TWI244860B - Image projection method, projector, and computer-readable recording medium - Google Patents

Image projection method, projector, and computer-readable recording medium Download PDF

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Publication number
TWI244860B
TWI244860B TW093122958A TW93122958A TWI244860B TW I244860 B TWI244860 B TW I244860B TW 093122958 A TW093122958 A TW 093122958A TW 93122958 A TW93122958 A TW 93122958A TW I244860 B TWI244860 B TW I244860B
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Taiwan
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image
projected
rectangular
aforementioned
projection
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TW093122958A
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Chinese (zh)
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TW200603617A (en
Inventor
Kazuya Arakawa
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Sharp Kk
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3185—Geometric adjustment, e.g. keystone or convergence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3191—Testing thereof
    • H04N9/3194—Testing thereof including sensor feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
    • H04N7/0122—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal the input and the output signals having different aspect ratios

Abstract

A method for projecting an image automatically to the center of an object to which the image is to be projected (screen) when a projecting image is smaller than the dimensions of the object to which the image is to be projected. When it is decided that the size of a projecting image PJ not subjected to correction of trapezoidal distortion is smaller than the dimensions of the screen S, based on an image (3I) picked up at a camera section, a virtual contraction screen Vs having an aspect ratio identical to that of the projecting image is set in the center of the screen S and then adjustment of size and correction of trapezoidal distortion are carried out such that the projecting image coincides with the virtual contraction screen Vs.

Description

1244860 九、發明說明： 【發明所屬之技術領域】 本發明係關於在投射準備階段可自動調整投射之圖像尺 寸，並且可修正梯形失真之圖像投射方法，及藉由此種圖 像投射方法投射圖像之投影機，以及此種投影機之控制電 路用或以通用電腦控制投影機用之電腦程式。 【先前技術】 在螢幕、白牆及白板等之被投射體上投射圖像之投影 機為求可自彳又影機之设置位置進行適切之投射，首先須 调整投射相關之數個設定項目來實施投射準備。 上述之設定項目如：焦點調整、色質修正、圖像尺寸調 整（變焦调整）及梯形失真修正（Keystone修正）等。此等項目 之設定，先前通常係構成自投影機依序投射依據各項目之 ’貝J π式圖案圖像，藉由以拍攝裝置拍攝投射於被投射體上之 測试圖案圖像之狀態，加以反饋，來進行調整及修正。如 變焦調整時’係依據使用者之指示或投影機之自動判斷， 調整投射透鏡之變焦功能，放大或縮小投射圖像，使投射 於被投射體上之尺寸調整用之測試圖案圖像適切收納於被 才又射體。另外，投影機通常係對於投射通過投射透鏡之透 鏡中心之光軸之圖像中心偏置（不一致），變焦調整通常係以 透鏡中心（通過透鏡中心之光軸）作為調整之基準。有關此種 才又影機之投射準備係揭不於下述之專利文獻1中。 專利文獻1 :特開2000-241874號公報 【發明内容】 95112-940805.doc 1244860 再者，上述之先前投影機之投射準備通常係在投影機侧 瞭解被投射體（如螢幕）之四個角位置及投射之圖像（投射圖 像）四個角之位置，並調整投射圖像之大小及梯形失真，使 投射之圖像四個角與被投射體之四個角之位置一致。但 是’在無法取得足夠之投影機與被投射體間之距離情況 下，即使以最大尺寸投射圖像，有時仍無法投射大於被投 射體之尺寸，此種情況下，無法使投射之圖像四個角與被 投射體四個角之位置一致。 在上述丨月況下’宜調整成投射圖像在被投射體之中央部 分’不過先前並無自動進行此種調整之投影機。因此存在， 在此種情況下’須人工進行圖像之投射位置之設定及梯形 失真修正（Keystone修正）等之問題。 有鑑於以上之問題，本發明主要目的在提供一種因被投 射體與投影機之間無法取得足夠距離，而僅可以小於被投 射體之尺寸投射圖像時，在被投射體之中央部自動設定虛 擬投射框，投射圖像至該虛擬投射框之圖像投射方法，及 藉由此種圖像投射方法來投射圖像之投影機。 此外，本發明除上述目的之外，在提供一種修正投射圖 像之梯形失真，可投射圖像至虛擬之投射框之圖像投射方 法及藉由此種圖像投射方法來投射圖像之投影機。 再者，本發明除上述目的之外，在提供一種以最大尺寸 設定虛擬之投射框之圖像投射方法及藉由此種圖像投射方 法來投射圖像之投影機。此時，#由使用熟知之二維投影 轉換，可輕易設定虛擬之投射框。 p 95112-940805.doc 1244860 再者，本發明之目的在提供一種上述投影機之控制電路 用，或以通用電腦控制投影機用之電腦程式。 為求解決上述問題，本發明之圖像投射方法係依據顯示 投射至矩形狀被投射體之矩形狀投射圖像之資訊，使空間 光凋制機構生成調制光，使投射透鏡投射前述空間光調制 機構生成之調制光至前述矩形狀之被投射體時，依據顯示 將刚述矩形狀之投射圖像變形後之圖像之資訊，使前述空 間光調制機構生成調制光，而在前述矩形狀之被投射體上 投射成矩形狀之圖像，其特徵為··在前述空間光調制機構 上設定具有與前述矩形狀之投射圖像相同之縱橫尺寸比， 於投射至則述矩开> 狀之被投射體時，在小於前述矩形狀被 才又射體之尺寸，並使中心與前述矩形狀被投射體之中心一 致狀態下’成為矩形狀之虛擬投射框。 為求解決上述問題，本發明之投影機具備··空間光調制 機構’其係依據顯示投射至矩形狀被投射體之矩形狀投射 圖像之資訊生成調制光；及投射透鏡，其係將該空間光調 制機構生成之調制光投射至前述矩形狀之被投射體；並依 據顯示將前述矩形狀之投射圖像變形後之圖像之資訊，使 前述空間光調制機構生成調制光，而在前述矩形狀之被投 射體上投射成矩形之圖像，其特徵為具備虛擬投射框設定 機構，其係在前述空間光調制機構上設定具有與前述矩形 狀之投射圖像相同之縱橫尺寸比，於投射至前述矩形狀之 被投射體時，在小於前述矩形狀被投射體之尺寸，並使中 心與前述矩形狀被投射體之中心一致狀態下，成為矩形狀 95112-940805.doc 1244860 之虛擬投射框。 此種本發明之圖像投射方法及投影機，係在空間光調制 機構上設定投射至被投射體時具有與投射圖像相同縱橫尺 寸比，小於被投射體之尺寸，並使中心與被投射體之中心 一致之矩形狀虛擬投射框。 此外，本發明之圖像投射方法係依據顯示投射至矩形狀 被投射體之矩形狀投射圖像之資訊，使空間光調制機構生 成調制光’使投射透鏡投射該空間光調制機構生成之調制 光至前述矩形狀被投射體時，依據顯示將前述矩形狀之投 射圖像變形後之圖像之資訊，使前述空間光調制機構生成 调制光’而在前述被投射體上投射成矩形之圖像，其特徵 為：在前述空間光調制機構上設定具有與前述矩形狀之投 射圖像相同之縱橫尺寸比，於投射至前述矩形狀之被投射 體時，在小於前述矩形狀被投射體之尺寸，並使中心與前 述矩形狀被投射體之中心一致狀態下，成為矩形狀之虛擬 才又射框’運弄則述空間光調制機構上之前述矩形狀投射圖 像之變形量，使設定於前述空間光調制機構上之虛擬投射 框之四個角與前述矩形狀投射圖像之四個角一致。 此外，本發明之投影機具備：空間光調制機構，其係依 據顯示投射至矩形狀被投射體之矩形狀投射圖像之資訊生 成調制光；及投射透鏡，其係將該空間光調制機構生成之 調制光投射至前述矩形狀之被投射體；並依據顯示將前述 矩形狀之投射圖像變形後之圖像之資訊，使前述空間光調 制機構生成調制光，而在前述矩形狀之被投射體上投射成 95112-940805.doc 1244860 矩形之圖像，其特徵為具備：虛擬投射框設定機構，其係 在前述空間光調制機構上設定具有與前述矩形狀之投射圖 像相同之縱橫尺寸比，於投射至前述矩形狀之被投射體 時，在小於前述矩形狀被投射體之尺寸，並使中心與前述 矩形狀被投射體之中心一致狀態下，成為矩形狀之虛擬投 射框；及運算機構，其係運算前述空間光調制機構上之前 述矩形狀投射圖像之變形量，而使該虛擬投射框設定機構 設定於前述空間光調制機構上之虛擬投射框之四個角與前 述矩形狀投射圖像之四個角一致。 此種本發明之圖像投射方法及投影機，係在空間光調制 機構上設定投射至被投射體時具有與投射圖像相同縱橫尺 寸比，小於被投射體之尺寸，並使中心與被投射體之中心 一致之矩形狀虛擬投射框。而後，運算投射圖像之變形量， 在使设定於該空間光調制機構上之虛擬投射框四個角與投 射圖像之四個角一致狀態下投射，並依據該運算結果將投 射圖像予以變形後投射至被投射體。 此外，本發明之圖像投射方法之特徵為：在上述圖像投 射方法之發明中，係以拍攝機構拍攝圖像，該圖像包含： 依據顯示未變形之前述投射圖像之資訊，使前述空間光調 制機構生成調制光，將前述空間光調制機構生成之調制 光l過别述投射透鏡而以最大尺寸投射至前述被投射體 時之前述投射圖像之四個角位置；及前述被投射體之四個 ^ 自成述拍攝機構拍攝之圖像，在設定於前述拍攝 機構之座標I統上指定前述被投射冑之四個角&置及前述 95112-940805.doc 1244860 投射圖像之四個角位置’在前述座標系統上指定之前述被 投射體之四個角位置内之至少一個存在於前述座標系統上 指定之前述投射圖像之四個角位置之外側時，在前述空間 光調制機構上設定前述虛擬投射框。 此外，本發明之投影機之特徵為：在上述投影機之發明 中具備··拍攝機構，其係拍攝圖像，該圖像包含··將依據 顯示未變形之前述投射圖像之資訊，使前述空間光調制機 構生成之調制光通過前述投射透鏡，而以最大尺寸投射至 鈾述被投射體時之前述投射圖像之四個角位置；及前述被 投射體之四個角位置；及指定機構，其係自該拍攝機構拍 攝之圖像，在設定於前述拍攝機構之座標系統上指定前述 被投射體之四個角位置及前述投射圖像之四個角位置；前 述虛擬投射框設定機構於前述指定機構在前述座標系統上 指定之前述被投射體之四個角位置内之至少一個存在於前 述指定機構在前述座標系統上指定之前述投射圖像之四個 角位置之外側時，在前述空間光調制機構上設定前述虛擬 投射框。 此種本發明之圖像投射方法及投影機，係在上述圖像投 射方法及投影機之發明中，進一步藉由拍攝機構拍攝圖 像，忒圖像包含：依據顯示未變形之矩形狀投射圖像之資 Λ，通過投射透鏡，而以最大尺寸投射至被投射體時之投 射圖像之四個角位置；及被投射體之四個角位置。而後自 該拍攝機構拍攝之圖像，在設定於拍攝機構之座標系統上 指定被投射體之四個角位置及投射圖像之四個角位置，在 95112-940805.doc -10- 1244860 該座標系統上指定之被投射體之四個角位置内之至少一個 位於投射圖像之四個角位置之外側時，設定虛擬投射框。 再者，本發明之圖像投射方法之特徵為：在上述圖像投 射方法之發明中’係依據在前述座標系統上指定之前述被 投射體之四個角位置及前述投射圖像之四個角位置，在前 述空間光調制機構上設定最大尺寸之虛擬投射框。 再者，本發明之投影機之特徵為：在上述發明中，前述 虛擬投射框設定機構係依據前述指定機構在前述座標系統 上指定之前述被投射體之四個角位置及前述投射圖像之四 個角位置，在前述空間光調制機構上設定最大尺寸之虛擬 投射框。 此種本發明之圖像投射方法及投影機，係在上述圖像投 射方法及投影機之發明中，依據前述座標系統上指定之被 投射體之四個角位置及投射圖像之四個角位置來設定最大 尺寸之虛擬投射框。 此外’本發明之圖像投射方法之特徵為：在上述圖像投 射方法之發明中，藉由階段性縮小將前述座標系統上指定 之前述被投射體之縱橫尺寸比轉換成前述投射圖像之縱橫 尺寸比之虛擬投射框，依據階段性縮小之虛擬投射框之全 部四個角位於前述座標系統上指定之前述投射圖像之範圍 内時之縮小比，在前述空間光調制機構上設定最大尺寸之 虛擬投射框。 此外，本發明之投影機之特徵為：在上述發明中，前述 虛擬投射框設定機構藉由階段性縮小前述指定機構在前述 95112-940805.doc 1244860 座標系統上指定之前述被投射體之縱橫尺寸比轉換成前述 · 才又射圖像之縱橫尺寸比之虛擬投射框，依據階段性縮小之 虛擬投射框之全部四個角位於前述指定機構在前述座標系 統上指定之前述投射圖像之範圍内時之縮小比，在前述空 間光調制機構上設定最大尺寸之虛擬投射框。 1 此種本發明之圖像投射方法及投影機，在上述圖像投射 方法及投影機之發明中，係階段性縮小前述座標系統上指 疋之被投射體之縱橫尺寸比轉換成投射圖像之縱橫尺寸比 之虛擬投射框。而後，依據階段性縮小之虛擬投射框之全 · 部四個角位於前述座標系統上指定之投射圖像範圍内時之 縮小比，來設定最大尺寸之虛擬投射框。 再者，本發明之圖像投射方法之特徵為··在前述圖像投 射方法之發明中，係藉由以前述被投射體之中心為中心， 使用一維之投影轉換，將前述被投射體之四個角之位置關 係轉換成具有與前述投射圖像相同縱橫尺寸比之矩形四個 角之位置關係，在前述空間光調制機構上設定虛擬投射框。 再者，本發明之投影機之特徵為··在前述發明中，前述 _ 虛擬投射框設定機構係藉由以前述被投射體之中心為中 〜，使用一維之投影轉換，將前述被投射體之四個角之位 置關係轉換成具有前述投射圖像之縱橫尺寸比之矩形四個 角之位置關係，在前述空間光調制機構上設定前述虛擬投 射框。 此種本發明t圖像投射方法及投影機係在上述圖像投射 方法及投影機之發明中，藉由以被投射體之中心為中心， 95112-940805.doc 1244860 使用二維之投影轉換，將被投射體之四個角之位置關係轉 換成具有與投射圖像相同縱橫尺寸比之矩形四個角之位置 關係’來設定虛擬投射框。 此外，本發明之投影機具備：空間光調制機構，其係依 據顯示投射至矩形狀被投射體之矩形狀投射圖像之資訊而 生成調制光；投射透鏡，其係將該空間光調制機構生成之 調制光投射至前述矩形狀之被投射體；及拍攝裝置；並依 據前述拍攝裝置拍攝之圖像，設定依據顯示前述矩形狀投 射圖像變形後之圖像之資訊，使前述空間光調制機構生成 調制光’而在前述被投射體上投射成矩形狀圖像用之具有 與前述矩形狀投射圖像相同縱橫尺寸比，且比前述被投射 體尺寸小，並使中心與前述被投射體之中心一致之矩形狀 虛擬投射框’其特徵為具備以下機構··使前述空間光調制 機構生成顯示測試圖案之調制光，該測試圖案顯示前述矩 形狀投射圖像之四個角，並自前述投射透鏡向前述矩形狀 之被投射體投射；使前述拍攝裝置拍攝前述測試圖案向前 述矩形狀被投射體投射之狀態；在前述拍攝裝置拍攝之圖 像上檢測前述矩形狀被投射體之四個角位置；在前述拍攝 裝置拍攝之圖像上檢測前述投射之測試圖案之四個角位 置，祆查刚述拍攝裝置拍攝之圖像上之前述矩形狀被投射 體之四個角與測試圖案四個角之相對位置關係；及在前述 拍攝裝置拍攝之圖像上，前述矩形狀被投射體四個角内之 至少一個未在被前述投射之測試圖案之四個角包圍之範圍 内時，決定虛擬投射框之四個角。 95112-940805.doc -13 - 1244860 此種本發明之投影機係向被投射體投射顯示投射圖像之 四個角之測試圖案，藉由拍攝裝置拍攝該狀態，而在該圖 像上^双測被技射體之四個角位置，並且檢測投射之測試圖 案之四個角位置。而後檢查拍攝裝置拍攝之圖像上之被投 射體之四個角與測試圖案之四個角之相對位置關係，依據 該結果’於被投射體四個角内之至少一個未在被投射之測 試圖案四個角包圍之範圍内時，決定虛擬投射框之四個角。 此外，本發明之電腦程式之特徵為：在電腦内，該電腦 具備：空間光調制機構，其係依據顯示投射至矩形狀被投 射體之矩形狀投射圖像之資訊而生成調制光；投射透鏡， 其係將該空間光調制機構生成之調制光投射至前述矩形狀 之被投射體；及拍攝裝置；並依據顯示前述矩形狀投射圖 像變形後之圖像之資訊，使前述空間光調制機構生成調制 光，而在前述被投射體上投射成矩形狀之圖像，依據前述 拍攝裝置拍攝之圖像，設定具有與前述矩形狀投射圖像相 同縱橫尺寸比，且比前述矩形狀被投射體之尺寸小，並使 中心與前述矩形狀被投射體之中心一致之矩形狀之虛擬投 射框’且使前述電腦執行以下步驟··使前述空間光調制機 構生成顯示測試圖案之調制光，該測試圖案顯示前述矩形 狀才又射圖像之四個角，並自前述投射透鏡向前述矩形狀之 被投射體投射；使前述拍攝裝置拍攝前述測試圖案向前述 矩形狀被投射體投射之狀態；在前述拍攝裝置拍攝之圖像 上檢測前述矩形狀被投射體之四個角位置；在前述拍攝裝 置拍攝之圖像上檢測前述投射之測試圖案之四個角位置； 95112-940805.doc -14- 1244860 檢查前述拍攝裝置拍攝之圖像上之前述矩形狀被投射體之 四個角與測試圖案之四個角之相對位置關係；及在前述拍 攝裝置拍攝之圖像上，於前述矩形狀被投射體之四個角内 之至少一個未在被前述投射之測試圖案之四個角包圍之範 圍内時，決定虛擬投射框之四個角。 此種本發明之電腦程式之控制係向被投射體投射顯示投 射圖像之四個角之測試圖案，藉由拍攝裝置拍攝該狀態， 而在該圖像上檢測被投射體之四個角位置，並且檢測投射 之測試圖案之四個角位置。而後，電腦控制成檢查拍攝裝 置拍攝之圖像上之被投射體四個角與測試圖案之四個角之 相對位置關係，並依據該結果，於被投射體之四個角内之 至少一個未在被投射之測試圖案之四個角包圍之範圍内 時，決定虛擬投射框之四個角。 採用以上本發明之圖像投射方法及投影機時，由於係在 空間光調制機構上設定投射至被投射體時，具有與投射圖 像相同之縱橫尺寸比，且比被投射體尺寸小，並使中心與 被投射體之中心一致之矩形狀之虛擬投射框，因此可輕易 投射投射圖像成比被投射體小。 此外，採用本發明之圖像投射方法及投影機時，由於係 在空間光調制機構上設定投射至被投射體時，具有與投射 圖像相同之縱橫尺寸比，且比被投射體尺寸小，並使中心 與被投射體之中心一致之矩形狀之虛擬投射框，在投射圖 像一致狀態下投射至該虛擬投射框，因此，在無法取得足 夠之被投射體與投影機間之距離時，可自動進行先前僅能 95112-940805.doc -15- 1244860 以人工進行之調整。 、此外’才木用本發明之圖像投射方法及投影機時，係在上 述發月中it步自包含依據顯示未變形之矩形狀之投射 圖像之資訊，通過投射透鏡’而以最大尺寸投射至被投射 體時之四個角位置與被投射體之四個角位置之拍攝裝置所 :攝之圖I’自動判斷上述調整之必要性，因此，完全不 而要人工即可自動進行無法取得足夠之被投射體與投影 機間距離時之調整。 再者’採用本發明之圖像投射方法及投影機時，在上述 發明中，於投射至被投射體上時，不需要人工，而可自動 設定最大尺寸之虛擬投射框。 此外，採用本發明之圖像投射方法及投影機時，於上述 發明中’依據階段性縮小之虛擬投射框之全部四個角位於 在月）述座“系統上指定之投射圖像之範圍内時之縮小比， 不而要人工而可自動在空間光調制機構上設定最大尺寸之 虛擬投射框。 此外，採用本發明之圖像投射方法及投影機時，於上述 發明中’肖由使用熟知之運算方法之二維投影轉換來轉換 被投射體之四個角之位置關係’即可輕易設定虛擬投射框。 此外’採用本發明之投影機時，藉由檢查拍攝裝置拍攝 之圖像上之被投射體之四個角與測試圖案之四個角之相對 位置關係’於被投射體之四個角之至少—個未在被投射之 α»式圖木四個角包圍之範圍内時’投影機自動進行決定产 擬投射框四個角之處理，因此即使無法取得；I夠之投影: 95112-940805.doc • 16 - 1244860 與被投射體之間隔時’仍可自動進行先前僅能以人工進行 之調整。 此外，採用本發明之電腦程式時，藉由控制上述之投影 機，或是以通用電腦自外部控制投影機，即可實現上述之 圖像投射方法。 【實施方式】 以下參照顯示最佳實施形態之圖式來說明本發明。圖i 係顯示本發明之投影機一種實施形態之内部構造例之區塊 圖。另外，以下說明係以本發明之投影機實施本發明之圖 像技射方法之情況為例，不過本發明之圖像投射方法除作 為投影機而構成之裝置外，亦可適用於兼具投影機功能之 裝置’或在僅具有投射圖像功能之投影機上如連接個人電 腦來控制之情況。 本實施形態之投影機1具有可自動進行投射準備之自動 調整功能。所謂自動調整功能，具體而言係指在投射準備 時自投射透鏡2投射測試圖案圖像至被投射體之螢幕s，以 攝影機部3拍攝投射至螢幕s之測試圖案圖像之狀態，依據 拍攝結果所獲得之螢幕S之四個角位置及測試圖案圖像之 四個角位置，自動進行投射之圖像（投射圖像）尺寸、位置、 梯形失真（Keystone)修正等投射準備之功能。另外，自動調 整功能中，其他亦有色修正及焦點調整等，不過與本發明 無直接關係，因此省略關於此等之說明。 投影機1具備主要對自外部輸入之投射用之圖像進行處 理部分之外部連接部4及圖像轉換部5。此外，投影機丨還具 95112-940805.doc -17· 1244860 2要進行投射相關處理部分之色控制部6、測試圖案圖像 、邛7、投射裝置部8、投射透鏡驅動部9及投射透鏡2。 再者^影機1還具備主要進行自動調整功能相關處理部分 之攝影機部3及檢測部n。再者，投影機#備：作為受理 使用者操作機構之操作部12 ;及遙控器（以下稱遙控器）2〇 之遙控裔受光部13。另外投影機1之整體控制係由系統控制 部10來進行。 外部連接部4與輸出投射用圖像之外部機器連接，輸入自 邛機器輸出之矩形狀圖像，並傳送至圖像轉換部5。圖像 轉換°卩5依據系統控制部1 〇之控制，進行A/D轉換等必要之 轉換處理，並將實施轉換處理後之圖像傳送至投射裝置部 8 〇 色控制部6進行調整投射圖像顏色之處理。具體而言，色 控制部6係依據系統控制部1〇之控制，藉由調整R(紅）、 G(綠）、B(藍）各色之平衡，來進行投射圖像之色修正。此 外’測試圖案圖像切換部7係依據系統控制部丨〇之控制生成 自動調整功能上所需之各種測試圖案，並作為測試圖案圖 像而傳送至投射裝置部8。 投射裝置部8將須投射之圖像資訊（數位圖像資料）内藏 於光調制之空間光調制裝置8&内。而後，投射裝置部8生成 將自圖像轉換部5、測試圖案圖像切換部7及後述之系統控 制部10傳送之各種圖像之數位圖像資料經空間光調制裝置 8a予以光調制後之調制光。如此，投射裝置部8之空間光調 制裝置8a生成之調制光通過投射透鏡2而投射至外部之螢 95112-940805.doc -18- 1244860 幕s。結果在螢幕s上放映須投射之圖像。 另外，空間光調制裝置8a通常係使用液晶面板或DMD(數 位微反射鏡裝置）。使用液晶面板作為空間光調制裝置 時，係藉由在對應於須投射之圖像之數位資料之點單位之 各像素顯示圖像各點之狀態下使來自光源之光線透過，整 體投射顯示圖像之調制光，最後在螢幕s上放映圖像。此 外，使用DMD作為空間光調制裝置8&時，係藉由切換對應 於須投射之圖像之數位資料之點單位之微小反射鏡 (Micromirrow)之反射角，並使來自光源之光線反射，在以 整個反射光（调制光）顯示之狀態下投射須投射之圖像，最後 在螢幕S上放映圖像。 另外’本實施形態係採用使用液晶面板作為空間光調制 裝置8a之構造，在以下之說明中，亦係將須投射之圖像顯 示於作為空間光調制裝置8a之液晶面板上作為圖像，在所 顯示之圖像上使來自光源之光線透過，藉由自投射透鏡2 投射而投射圖像在螢幕S上。但是，如上所述，使用dmd 時，亦係藉由切換對應於數位圖像資料之像素之微小反射 鏡之反射角，整個反射光（調制光）顯示圖像。因此，與在液 晶面板上’可對應於數位圖像資料之點來指定各個像素時 同樣地，在DMD中亦可對應於數位圖像資料之點來指定各 個微小反射鏡。 圖2係顯示上述投射裝置部8具有之液晶面板製之空間光 調制裝置（以下簡稱為面板）8a之像素構造之模式圖。本實施 形態一種例子係面板8a具備在水平方向上為1〇24像素，在 95112-940805.doc •19- 1244860 垂直方向上為768像素，亦即依XGA規袼之矩形狀之顯示範 圍’將左上角之座標值（0, 0)之像素作為原點，設定水平方 向為X軸，垂直方向為y軸之面板座標系統。因此，對應於 水平方向及垂直方向之各像素之面板座標系統之座標值自 系統控制部1 0送至投射裝置部8時，投射裝置部8依據該面 板座標系統之座標值，在面板座標系統上指定顯示於面板 8a之顯示範圍之圖像位置及尺寸。如自系統控制部丨〇分別 指定「127」作為水平方向之座標值，及指定「127」作為 垂直方向之座標值時，投射裝置部8係將面板8&之左上角之 像素作為原點’而在水平方向及垂直方向上分別為第128 個像素之位置上顯示點。 另外，使用DMD作為空間光調制裝置8&時，亦可設定與 使用上述液晶面板時相同之面板座標系統。但是，如前述， 由於本實形態係採用使用液晶面板作為空間光調制裝置 8a之構造，因此，在以下說明中，亦係說明使用液晶面板 作為空間光調制裝置8a之構造，不過面板座標系統之相關 概念，不論係使用液晶面板或使用DMD作為空間光調制裝 置8a’基本上均相同。 才又射透鏡2除擴大透過面板8&之光線（調制光）而投射至螢 幕S上作為圖像用之必要之原本透鏡之外，還由變焦（圖像 尺寸）調整用透鏡及焦點調整用透鏡等數個透鏡構成，不過 圖上亚未顯示。投射透鏡驅動部9具有使投射透鏡2之變焦 周王用透鏡及焦點調整用透鏡之位置變更之致動器。而投 射透鏡驅動部9係依據系統控制部1〇之控制，藉由驅動致動 95112-940805.doc -20- 1244860 器來進行變焦調整及焦點調整。 此外，圖1所示之攝影機部3於投射準備之自動調整時， 係拍攝投射至螢幕S之各種測試圖案圖像，並將拍攝之圖像 傳送至檢測部11。另外，自投影機丨投射之測試圖案圖像， 除前述之色修正用之測試圖案圖像及圖上未顯示之焦點調 整用測試圖案之外，還備有兼具圖3之模式圖所示之變焦調 整及梯形失真修正（Keystone修正）用之測試圖案圖像25。該 測試圖案圖像25具有對應於投射之圖像外輪廓而設於周圍 之粗框之測試圖案（以下稱粗框部25b)。 另外，以下之說明，關於使用色修正用之測試圖案圖像 及焦點調整用測試圖案圖像之色修正及焦點調整之處理， 基本上與本發明無關，因此不說明此等之處理。 松測部11分析自攝影機部3送達之拍攝圖像。該圖像分析 係在攝影機座標系統上進行。所謂攝影機座標系統係指設 於=影機部3内之座標系統。更具體而言，攝影機座標系統 係:於攝影機部3之拍攝視野之座標系統，與設定於前述空 間光調制裝置8a之面板座標系統同樣地，係將攝影機部3之 攝視予之左上角作為原點，水平方向為X軸，垂直方向為 y軸之座標系統。但是，實際上攝影機座㈣統係設定攝影 機部3之拍攝元件之面板（CCD面板）之左上角作為原點，此 可視為係在攝影機部3拍攝之圖像上設定攝影機座標。 口此，檢測部11依據攝影機部3拍攝之圖像，藉由先前熟 ▲方法铋測攝影機座標系統上之螢幕S之四個角位置之 Λ軚值以及圖3之測試圖案圖像25之粗框部25b依據當時 95112-940805.doc -21 - 1244860 投影機1之狀況而投射之圖像之四個角位置之座標值。此 外’檢測此等座標值日夺，螢幕s及投射圖像（測試圖案圖像 25 =粗框心5b)之梯形失真之狀料，當然亦可依據其結 果錯由運算而分別求出。檢測部11將如上之檢測結果傳送 至系統控制部1 〇。 汉於投影機1之操作部12具有數個按鈕及開關等，使用者 #作此等按鈕及開關等時，受理依據所操作之按鈕及開關 專之操作才曰示，並傳送至系統控制部10。此外，遙控器受 光部13受理來自投影機丨之遙控諸之操作信號，並傳送至 系統控制部10。圖4係顯示遙控器2〇外觀之模式圖。如圖4 所不，遙控器20係採用GUI方式，其係除數個按鈕之外，還 具有上下左右之選擇鍵20a〜2〇d及確定鍵2〇e，藉由選擇鍵 20a〜20d及確定鍵20e之操作，使用者可自顯示於自投影機1 才又射之OSD(螢幕上顯示）之選單圖像上之數個項目中選擇 所需之項目。 另外’操作部12中亦設有與遙控器2〇相同之上下左右之 選擇鍵及確定鍵。因此，以操作部12與遙控器20執行相同 操作時，係對系統控制部1〇下達相同之指示。 進行上述各部控制之系統控制部10具有：ROM 10a及 HAM 1 Ob。R〇Ml〇a内預先記憶有規定系統控制部1〇進行之 控制内容之程式l〇p(本發明之電腦程式），與顯示包含圖3 所不之測試圖案圖像25之各種測試圖案圖像及各種選單圖 像用之育料。RAM1〇b暫時記憶藉由系統控制部1〇控制時產 生之各種資料等。 95112-940805.doc -22- 1244860 上述構造之本實施形態之投影機1之系統控制部1〇於一 般自動調整時，係藉由圖5之流程圖所示之處理，進行使投 射圖像與螢幕S—致之調整。另外，以下之處理係系統控制 部1〇依據收納於ROMlOa之程式10p來執行。 首先’系統控制部10如投射全白之圖像（步驟Sl)。藉由 檢測部11分析以攝影機部3拍攝該狀態之圖像，來檢測螢幕 s之四個角在攝影機座標系統上之位置（步驟S2)。這從螢幕 S之反射率與其周圍（如壁面）等之反射率之差異即可輕易 檢測。 其次’系統控制部1 〇投射包含圖3所示之投射圖像框檢測 用之測試圖案之粗框部251)之投射圖像框檢測用之測試圖 案圖像25(步驟S3)。藉由檢測部11分析以攝影機部3拍攝該 狀態之圖像，檢測投射圖像框檢測用之測試圖案之粗框部 25b四個角在攝影機座標系統上之位置（步驟S4)。這從投射 圖像框檢測用之測試圖案之粗框部25b部分之反射率與其 周圍反射率之差異即可輕易檢測。其次，系統控制部丨〇依 據螢幕S及投射圖像框檢測用之測試圖案之粗框部25b各個 四個角在攝影機座標系統上之位置關係，進行變焦調整（步 驟S5)。該變焦調整如投射圖像框檢測用之測試圖案之粗框 郤2 5 b藉由變焦而達到螢幕s之端點，藉由放大或縮小投射 圖像框檢測用之測試圖案之粗框部25b來進行。 進行該變焦調整後，檢測部u再度自藉由攝影機部3拍攝 之圖像，來分析、檢測投射圖像框檢測用之測試圖案之粗 框部25b四個角在攝影機座標系統上之位置（步驟％”從步 95112-940805.doc -23· 1244860 驟S2檢測出之螢幕s四個角在攝影機座標系統上之位置，與 在V驟S 6仏測出之變焦修正後之粗框部2 5 b四個角在攝影 機座標系統上之位置之關係，來決定變焦修正後之投射圖 像框檢測用之測試圖案之粗框部25b四個角在面板座標系 統上之位置，亦即決定座標值（步驟S7)。結果在面板8a上， 須投射之圖像與投射至螢幕S之形狀相反地變形來顯示。 藉由系統控制部1 〇依序執行上述一連串處理，投射裝置 4 8依據系統控制部1〇提供之座標值，在面板“上顯示圖像 而投射該圖像情況下，係與螢幕S之尺寸完全相符地投射梯 形失真經修正之矩形圖像。藉由以上動作，投影機1之投射 準備自動完成。 以上藉由系統控制部10之處理係在先前一般性投射條 件’亦即取得足夠之螢幕8與投影機1間之距離時，具體而 言’係在投射圖像在螢幕S上之大小遠大於螢幕S之尺寸， 而在修正梯形失真狀態下，至少可投射全部螢幕s之尺寸 時’可自動進行之投射準備之處理。但是，在無法取得足 夠之螢幕S與投影機1間之距離狀況下，有時修正投射圖像 之梯形失真後之螢幕S上之最大尺寸小於螢幕s之尺寸，因 此無法進行上述之準備處理。 因此，本發明之投影機1由於在與螢幕s之間，因某種情 況而無法取得足夠之距離，導致修正投射之圖像（投射圖像） 之梯形失真後之螢幕S上之最大尺寸小於螢幕S之尺寸時， 具體而言，即使測試圖案圖像25之粗框部25b以最大尺寸投 射，螢幕S之全部四個角，或是其中一個位於投射之測試圖 95112-940805.doc -24- 1244860 案圖像25之粗框部25b之外側時，係構成在螢幕s之中央 部’具體而言係使中心一致，可以小於螢幕S之尺寸投射修 正梯形失真後之圖像。 圖6及圖7係具體說明上述狀態用之模式圖。圖6係自螢幕 S之正面觀察投射測試圖案圖像25之粗框部25b至螢幕S狀 態時之模式圖。由於投影機1並未正對螢幕S而設置，因此 係在投射之圖像（以下稱投射圖像PJ)之外輪廓，此時係測試 圖案圖像25之粗框部25b產生梯形失真之狀態下投射。圖7 係顯示以投影機1之攝影機部3拍攝圖6所示之狀態之圖 像’亦即在攝影機座標系統上觀察之狀態之模式圖。在拍 攝圖像31上，投射圖像PJ外輪廓之測試圖案圖像25之粗框 部25b拍攝成大致矩形狀，不過，係在螢幕s大，並產生梯 形失真之狀態下拍攝。 圖6所示之狀態係投射圖像pj以最大尺寸投射時，無法投 射投射圖像PJ，具體而言，無法在修正梯形失真狀態下使 測試圖案圖像25之粗框部25b與螢幕S之尺寸一致來投射。 因此，在此種情況下，本發明之投影機i如圖8之模式圖所 示，係藉由在面板座標系統上，對登幕S之四個角的座標 值’應用熟知之二維投影轉換，使中心與螢幕S —致，以小 於瑩幕S之尺寸，設定具有與面板8 3之縱橫尺寸比相同縱橫 尺寸比之虛擬螢幕（以下稱虛擬縮小螢幕VS)。而後，與該 虛擬縮小螢幕Vs尺寸一致地投射修正梯形失真後之投射圖 像PJ。 具體而言，對於以攝影機部3拍攝之圖像上之螢幕S之四 95112-940805.doc -25- 1244860 個角位置（以下稱攝影機座標系統上之座標值），藉由應用熟 知之一維投景> 轉換，求出虛擬縮小螢幕Vs四個角之位置（攝 〜機座彳示系統之座標值）’作為縮小比之函數，決定虛擬縮 小螢幕Vs四個角之座標值，使依據縮小比之虛擬縮小螢幕 Vs之四個角位置（攝影機座標系統之座標值）與修正梯形失 真後之最大尺寸之投射圖像PJ之四個角位置（攝影機座標 系統之座標值）一致。而後，進行熟知之二維投影轉換使投 射圖像PJ之四個角與決定之虛擬縮小螢幕Vs之四個角一 致。 首先，說明決定虛擬縮小螢幕Vs四個角座標值之運算方 法。當然该運异係依據檢測部Π分析攝影機部3拍攝之圖像 之結果，藉由系統控制部1 0來執行。輸入參數係在攝影機 座標系統上之螢幕S四個角之座標值，投射圖像PJ(具體而 石，係投射圖像框檢測用之測試圖案之粗框部25b)之四個 角之座標值，以及投影機1之投射装置部8之面板8aix方向 及y方向解像度，分別定義如下（參照圖7)。 •攝影機座標系統上之螢幕s四個角之座標值·· (sxl，syl)，（sx2, sy2)，(sx3, sy3)，(sx4, sy4) •攝影機座標系統上之投射圖像PJ四個角之座標值： (pjxl，pjyl)，(pjx2, pjy2)，(pjx3, pjy3)，(pjX4, pjy4) •面板之x方向解像度·· col(如XGA時為1〇24 ••參照圖2) •面板之y方向解像度：row(如XGA時為768 ••參照圖2) 再者，如圖2所示，投射裝置部8之面板8a四個角（ρι，ρ2, P3, P4)之座標值（面板座標系統上之座標值）如下所示，可 95112-940805.doc -26- 1244860 以解像度（本實施形態係依XGA規格之解像度）來表示，將 各個轉換後座標值（攝影機座標系統上之螢幕S之座標值）1244860 IX. Description of the invention: [Technical field to which the invention belongs] The present invention relates to an image projection method that can automatically adjust the size of the projected image and correct keystone distortion during the projection preparation stage, and by using such an image projection method A projector that projects an image, and a computer program for the control circuit of such a projector or for controlling the projector with a general-purpose computer. [Previous technology] In order to project the image on the projected object such as the screen, white wall, white board, etc., it is necessary to adjust the projection settings to adjust the projection settings. Implement projection preparation. The above setting items include: focus adjustment, color quality correction, image size adjustment (zoom adjustment), and keystone correction (Keystone correction). The setting of these items has previously been generally constituted by a state in which a projector's J π pattern image according to each item is sequentially projected from the projector, and the test pattern image projected on the projected object is captured by the shooting device. Give feedback to make adjustments and corrections. If the zoom adjustment is based on the user's instructions or the automatic judgment of the projector, adjust the zoom function of the projection lens to enlarge or reduce the projected image, so that the test pattern image used for size adjustment projected on the projected object is appropriately stored. Yu Beicai shot again. In addition, the projector is usually offset (inconsistent) from the image center of the optical axis projected through the lens center of the projection lens, and the zoom adjustment is usually based on the lens center (optical axis through the lens center) as the reference. The preparation of such a projector is not disclosed in Patent Document 1 described below. Patent Document 1: JP-A-2000-241874 [Summary of the Invention] 95112-940805. doc 1244860 In addition, the previous projection preparation of the previous projector is usually on the projector side to understand the four corner positions of the projected object (such as the screen) and the four corner positions of the projected image (projected image), and adjust The size and trapezoidal distortion of the projected image make the four corners of the projected image coincide with the four corners of the projected object. However, in the case where a sufficient distance between the projector and the object cannot be obtained, even if the image is projected at the maximum size, sometimes it cannot be projected larger than the size of the object. In this case, the projected image cannot be made. The four corners coincide with the four corners of the projected object. Under the above-mentioned conditions of the month, 'it is advisable to adjust the projected image to the central part of the projected object', but there has not been a projector which performs such adjustment automatically before. Therefore, there are problems such as setting the projection position of the image and keystone correction (Keystone correction) manually in this case. In view of the above problems, the main object of the present invention is to provide an automatic setting in the center of the projected object when the projected image can only be smaller than the size of the projected object because a sufficient distance cannot be obtained between the projected object and the projector. A virtual projection frame, an image projection method that projects an image onto the virtual projection frame, and a projector that projects an image by using this image projection method. In addition, the present invention provides an image projection method that corrects the trapezoidal distortion of a projected image, can project an image to a virtual projection frame, and projects an image by such an image projection method. machine. Furthermore, in addition to the above objects, the present invention provides an image projection method in which a virtual projection frame is set at a maximum size, and a projector that projects an image by such an image projection method. At this time, # is converted from a well-known two-dimensional projection, and a virtual projection frame can be easily set. p 95112-940805. doc 1244860 Furthermore, the object of the present invention is to provide a computer program for controlling the projector, or a computer program for controlling the projector with a general-purpose computer. In order to solve the above problems, the image projection method of the present invention is based on displaying information of a rectangular projection image projected onto a rectangular projected object, so that the spatial light withering mechanism generates modulated light, and the projection lens projects the aforementioned spatial light modulation. When the modulated light generated by the mechanism reaches the projected object in the rectangular shape, the spatial light modulation mechanism generates modulated light in accordance with the information displayed on the image after the rectangular projected image is deformed. The image projected into a rectangular shape on the object is characterized in that the aspect ratio is set on the aforementioned spatial light modulation mechanism to have the same aspect ratio as that of the rectangular projected image. When the projected object is smaller than the size of the rectangular object and the center is consistent with the center of the rectangular projected object, the object becomes a rectangular virtual projection frame. In order to solve the above-mentioned problems, the projector of the present invention is provided with a spatial light modulation mechanism that generates modulated light based on information that displays a rectangular projection image projected onto a rectangular projection object; and a projection lens that The modulated light generated by the spatial light modulation mechanism is projected onto the aforementioned rectangular projected object; and based on the displayed information of the transformed image of the rectangular projected image, the aforementioned spatial light modulation mechanism is used to generate modulated light. A rectangular image projected on a rectangular projected object is provided with a virtual projection frame setting mechanism, which is set on the aforementioned spatial light modulation mechanism to have the same aspect ratio as the aforementioned rectangular projected image. When projecting onto the aforementioned rectangular projected object, it becomes a rectangular shape 95112-940805 in a state smaller than the size of the aforementioned rectangular projected object and the center is consistent with the center of the aforementioned rectangular projected object. doc 1244860 virtual projection frame. The image projection method and projector of the present invention are set on a spatial light modulation mechanism to have the same aspect ratio as the projected image when projected onto the projected object, which is smaller than the size of the projected object, and the center and projected A rectangular virtual projection frame with the same center of the body. In addition, the image projection method of the present invention is based on displaying information of a rectangular projection image projected onto a rectangular projected object, so that the spatial light modulation mechanism generates modulated light, and the projection lens projects the modulated light generated by the spatial light modulation mechanism. When the rectangular projected object is reached, the spatial light modulation mechanism generates modulated light according to the information of the transformed image of the rectangular projected image, and projects a rectangular image on the projected object. It is characterized in that the aspect ratio is set on the aforementioned spatial light modulation mechanism to have the same aspect ratio as that of the rectangular projected image, and when projecting onto the rectangular projected object, it is smaller than the size of the rectangular projected object In the state where the center is consistent with the center of the rectangular projected object, a rectangular virtual frame is shot again. "Working with the above-mentioned spatial projection of the rectangular light on the spatial light modulation mechanism, the deformation amount is set to The four corners of the virtual projection frame on the spatial light modulation mechanism are consistent with the four corners of the rectangular projection image. In addition, the projector of the present invention includes: a spatial light modulation mechanism that generates modulated light based on information that displays a rectangular projection image projected onto a rectangular projected object; and a projection lens that generates the spatial light modulation mechanism. The modulated light is projected onto the rectangular projected object; and based on the displayed information of the transformed image of the rectangular projected image, the spatial light modulation mechanism generates modulated light and is projected on the rectangular projected object. On-body projection into 95112-940805. doc 1244860 A rectangular image is provided with a virtual projection frame setting mechanism which sets the same aspect ratio as the aforementioned rectangular projection image on the aforementioned spatial light modulation mechanism, and projects the image onto the aforementioned rectangular shape. When the projected object is smaller than the size of the rectangular projected object and the center is consistent with the center of the rectangular projected object, it becomes a rectangular virtual projection frame; and an arithmetic mechanism for calculating the aforementioned spatial light The amount of deformation of the rectangular projection image on the modulation mechanism, so that the four corners of the virtual projection frame set by the virtual projection frame setting mechanism on the spatial light modulation mechanism are consistent with the four corners of the rectangular projection image . The image projection method and projector of the present invention are set on a spatial light modulation mechanism to have the same aspect ratio as the projected image when projected onto the projected object, which is smaller than the size of the projected object, and the center and projected A rectangular virtual projection frame with the same center of the body. Then, the amount of deformation of the projected image is calculated, and the projection is performed in a state where the four corners of the virtual projection frame set on the spatial light modulation mechanism coincide with the four corners of the projected image, and the projected image is calculated according to the calculation result. After being deformed, it is projected onto the projected object. In addition, the image projection method of the present invention is characterized in that: in the above-mentioned invention of the image projection method, an image is captured by a shooting mechanism, and the image includes: The spatial light modulation mechanism generates modulated light, and the modulated light 1 generated by the aforementioned spatial light modulation mechanism passes through the other projection lens and is projected to the four corner positions of the projected image at the maximum size when projected onto the object; and Four images of the body ^ Self-described image taken by the shooting mechanism, the coordinates set on the aforementioned shooting mechanism I designated the aforementioned four angles of the projected 胄 & set and the aforementioned 95112-940805. doc 1244860 Four angular positions of the projected image 'At least one of the four angular positions of the aforementioned projected object specified on the aforementioned coordinate system exists outside the four angular positions of the aforementioned projected image specified on the aforementioned coordinate system At this time, the virtual projection frame is set on the spatial light modulation mechanism. In addition, the projector of the present invention is characterized in that: in the above invention of the projector, a photographing mechanism is provided, which captures an image, and the image includes ... The modulated light generated by the aforementioned spatial light modulation mechanism passes through the aforementioned projection lens, and is projected at the maximum size to the four angular positions of the projected image when the projected object is uranium; and the four angular positions of the projected object; and the designation Mechanism, which is an image taken from the shooting mechanism, and specifies the four angular positions of the projected object and the four angular positions of the projected image on the coordinate system set in the aforementioned shooting mechanism; the virtual projection frame setting mechanism When at least one of the four angular positions of the projected object designated by the aforementioned designating agency on the aforementioned coordinate system exists outside the four angular positions of the aforementioned projected image designated by the aforementioned designating agency on the aforementioned coordinate system, The virtual projection frame is set on the spatial light modulation mechanism. The image projection method and the projector of the present invention are in the above-mentioned image projection method and the invention of the projector, and the image is further captured by the shooting mechanism. The image includes: a rectangular projection image that is not deformed according to the display. The image asset Λ is projected through the projection lens to the four corner positions of the projected image when projected to the projected object at the maximum size; and the four corner positions of the projected object. The images taken from the shooting mechanism are then designated on the coordinate system of the shooting mechanism to specify the four angular positions of the projected object and the four angular positions of the projected image at 95112-940805. doc -10- 1244860 When at least one of the four angular positions of the projected object specified on the coordinate system is located outside the four angular positions of the projected image, a virtual projection frame is set. Furthermore, the image projection method of the present invention is characterized in that: in the above-mentioned invention of the image projection method, 'is based on the four angular positions of the projected object and the four projected images specified on the aforementioned coordinate system. For the angular position, a virtual projection frame of the largest size is set on the aforementioned spatial light modulation mechanism. Furthermore, the projector of the present invention is characterized in that: in the above invention, the virtual projection frame setting mechanism is based on the four angular positions of the projected object and the projected image specified by the designation mechanism on the coordinate system. At the four angular positions, a virtual projection frame of the largest size is set on the aforementioned spatial light modulation mechanism. Such an image projection method and a projector of the present invention are based on the above-mentioned image projection method and the invention of the projector, according to the four angular positions of the object to be projected and the four corners of the projected image specified on the aforementioned coordinate system. Position to set the maximum size of the virtual projection frame. In addition, the feature of the image projection method of the present invention is that in the invention of the image projection method described above, the aspect ratio of the projected object specified on the coordinate system is converted into the projected image by stepwise reduction. The aspect ratio of the virtual projection frame, based on the reduction ratio when all four corners of the progressively reduced virtual projection frame are within the range of the aforementioned projection image specified on the aforementioned coordinate system, the maximum size is set on the aforementioned spatial light modulation mechanism Virtual projection frame. In addition, the projector of the present invention is characterized in that: in the above invention, the aforementioned virtual projection frame setting mechanism reduces the aforementioned designated mechanism in the aforementioned 95112-940805 by stepwise reduction. doc 1244860 The aspect ratio of the aforementioned projected object specified on the coordinate system is converted into the aforementioned virtual projection frame of the aspect ratio of the projected image, and all four corners of the virtual projection frame that are gradually reduced are located in the aforementioned designated mechanism. When the reduction ratio is within the range of the aforementioned projected image specified on the aforementioned coordinate system, a virtual projection frame having a maximum size is set on the aforementioned spatial light modulation mechanism. 1 In the image projection method and projector of the present invention, in the above image projection method and projector invention, the aspect ratio of the projected object referred to on the coordinate system is gradually reduced into a projected image. The aspect ratio of the virtual projection frame. Then, the maximum size of the virtual projection frame is set according to the reduction ratio when all four corners of the virtual projection frame that are gradually reduced are within the projection image range specified on the aforementioned coordinate system. Furthermore, the image projection method of the present invention is characterized in that, in the invention of the image projection method described above, the projected object is transformed by using the one-dimensional projection transformation around the center of the projected object as the center. The positional relationship of the four corners is converted into the positional relationship of the four corners of the rectangle having the same aspect ratio as the aforementioned projected image, and a virtual projection frame is set on the aforementioned spatial light modulation mechanism. Furthermore, the feature of the projector of the present invention is that in the aforementioned invention, the aforementioned _ virtual projection frame setting mechanism is based on using the center of the projected body as a center to transform the projected object using one-dimensional projection conversion. The positional relationship of the four corners of the body is converted into the positional relationship of the four corners of the rectangle having the aspect ratio of the projected image, and the virtual projection frame is set on the spatial light modulation mechanism. This t image projection method and projector of the present invention are in the above-mentioned image projection method and projector invention, by centering on the center of the object to be projected, 95112-940805. doc 1244860 uses two-dimensional projection transformation to convert the positional relationship of the four corners of the projected object into the positional relationship of the four corners of a rectangle with the same aspect ratio as the projected image 'to set the virtual projection frame. In addition, the projector according to the present invention includes: a spatial light modulation mechanism that generates modulated light based on information that displays a rectangular projection image projected onto a rectangular projection body; and a projection lens that generates the spatial light modulation mechanism. The modulated light is projected onto the rectangular projected object; and a photographing device; and based on the image captured by the photographing device, setting and displaying information of the deformed image of the rectangular projected image is set to make the spatial light modulation mechanism Generate modulated light 'and project a rectangular image on the projected object to have the same aspect ratio as the rectangular projected image, smaller than the size of the projected object, and centering the center and the projected object. The center-aligned rectangular virtual projection frame is characterized by having the following mechanisms: The aforementioned spatial light modulation mechanism generates modulated light that displays a test pattern that displays the four corners of the rectangular projection image and projects from the aforementioned projection The lens is projected onto the rectangular object to be projected; the imaging device is used to photograph the test pattern toward the rectangular shape; The state of the projection of the projection body; detecting the four corner positions of the rectangular projected object on the image captured by the aforementioned shooting device; detecting the four corner positions of the projected test pattern on the image captured by the aforementioned shooting device, 祆Check the relative positional relationship between the four corners of the rectangular projected object and the four corners of the test pattern on the image captured by the shooting device; and When at least one of the corners is not within the range surrounded by the four corners of the projected test pattern, the four corners of the virtual projection frame are determined. 95112-940805. doc -13-1244860 This type of projector of the present invention projects a test pattern showing the four corners of the projected image onto the projected object, and the state is captured by the photographing device, and the measured image is double-shot on the image. The four corner positions of the body, and the four corner positions of the projected test pattern are detected. Then check the relative positional relationship between the four corners of the projected object and the four corners of the test pattern on the image captured by the shooting device. According to the result, at least one of the four corners of the projected object is not being tested in the projection When within the range surrounded by the four corners of the pattern, the four corners of the virtual projection frame are determined. In addition, the computer program of the present invention is characterized in that the computer is provided with: a spatial light modulation mechanism that generates modulated light based on displaying information of a rectangular projection image projected onto a rectangular projection body; a projection lens It is to project the modulated light generated by the spatial light modulation mechanism to the aforementioned rectangular projected object; and a photographing device; and make the aforementioned spatial light modulation mechanism according to the information displaying the deformed image of the rectangular projected image. Generate modulated light and project a rectangular image on the projected object. Based on the image captured by the imaging device, set the same aspect ratio as the rectangular projected image, and set it to be larger than the rectangular projected object. It has a small size and a rectangular virtual projection frame whose center is the same as the center of the aforementioned rectangular projected object, and causes the aforementioned computer to perform the following steps: · The aforementioned spatial light modulation mechanism generates modulated light that displays a test pattern. The test The pattern displays the four corners of the image before the rectangular shape, and is projected from the projection lens to the rectangular shape. Projection; causing the camera to shoot the test pattern onto the rectangular projected object; detecting four corner positions of the rectangular projected object on the image captured by the camera; Detect the four corner positions of the projected test pattern on the image; 95112-940805. doc -14- 1244860 checks the relative positional relationship between the four corners of the rectangular projected object and the four corners of the test pattern on the image captured by the aforementioned shooting device; and When at least one of the four corners of the rectangular projected object is not within the range surrounded by the four corners of the test pattern projected above, the four corners of the virtual projection frame are determined. The control of the computer program of the present invention is to project a test pattern showing the four corners of the projected image to the projected object, and the state is captured by the shooting device, and the four corner positions of the projected object are detected on the image. And detect the four corner positions of the projected test pattern. Then, the computer controls to check the relative positional relationship between the four corners of the projected object and the four corners of the test pattern on the image captured by the shooting device, and based on the result, at least one of the four corners of the projected object is not When within the range surrounded by the four corners of the projected test pattern, the four corners of the virtual projection frame are determined. When the image projection method and the projector of the present invention are adopted, when the projection is set on the spatial light modulation mechanism to the projected object, it has the same aspect ratio as the projected image, and is smaller than the projected object size, and The rectangular virtual projection frame with the center consistent with the center of the projected object can easily project a projected image smaller than the projected object. In addition, when the image projection method and the projector of the present invention are used, when the projection is set on the spatial light modulation mechanism to the projected object, the aspect ratio is the same as that of the projected image and smaller than the projected object size. A rectangular virtual projection frame whose center is consistent with the center of the projected object is projected to the virtual projection frame with a consistent projection image. Therefore, when a sufficient distance between the projected object and the projector cannot be obtained, Can automate previously only 95112-940805. doc -15- 1244860 manual adjustment. In addition, when using the image projection method and projector of the present invention by Caimu, it is self-contained based on the information of the projected image that is not deformed in a rectangular shape in the above-mentioned step. The four corner positions when projecting onto the projected object and the four corner positions of the projected object are taken by the photographing device: the picture I 'automatically judges the necessity of the above adjustments. Therefore, it can be performed automatically without manual work. Adjustment when sufficient distance between the projected object and the projector is obtained. Furthermore, when the image projection method and the projector of the present invention are used, in the above-mentioned invention, when projecting onto the object to be projected, no manual work is required, and a maximum projection virtual frame can be automatically set. In addition, when using the image projection method and the projector of the present invention, in the above invention, all four corners of the virtual projection frame according to the phase reduction are located within the range of the projected image specified on the system. The reduction ratio of time can be set manually on the spatial light modulation mechanism without manually setting the maximum size of the virtual projection frame. In addition, when the image projection method and the projector of the present invention are used, the above-mentioned invention is well-known for the use of Xiao You The two-dimensional projection conversion of the calculation method is used to convert the positional relationship of the four corners of the projected object, and the virtual projection frame can be easily set. In addition, when the projector of the present invention is used, the image on the image captured by the shooting device is checked. The relative positional relationship between the four corners of the projected object and the four corners of the test pattern is 'at least one of the four corners of the projected object is not within the range surrounded by the four corners of the projected α »-type figure' The projector automatically performs the processing to determine the four corners of the intended projection frame, so even if it cannot be obtained; I can project enough: 95112-940805. doc • 16-1244860 The distance from the projected object ’can still be adjusted automatically by manual adjustment. In addition, when the computer program of the present invention is used, the above-mentioned image projection method can be realized by controlling the above-mentioned projector, or controlling the projector from the outside with a general-purpose computer. [Embodiment] The present invention will be described below with reference to the drawings showing the best mode. Fig. I is a block diagram showing an example of the internal structure of an embodiment of the projector of the present invention. In addition, the following description is based on the case where the projector of the present invention implements the image shooting method of the present invention as an example. However, the image projection method of the present invention can be applied to a combination of projections in addition to a device constructed as a projector. Device with a camera function 'or a projector connected to a personal computer to control it only with a projected image function. The projector 1 of this embodiment has an automatic adjustment function capable of automatically performing projection preparation. The so-called automatic adjustment function specifically refers to a state in which a test pattern image is projected from the projection lens 2 to the screen s of the object when the projection is prepared, and the test pattern image projected to the screen s is shot by the camera unit 3, according to the shooting As a result, the four corner positions of the screen S and the four corner positions of the test pattern image can automatically perform projection preparation functions such as the size, position, and keystone correction of the projected image (projected image). In addition, in the automatic adjustment function, other colored corrections, focus adjustments, and the like are also not directly related to the present invention, and therefore descriptions thereof are omitted. The projector 1 includes an external connection portion 4 and an image conversion portion 5 mainly for processing an image for projection input from the outside. In addition, the projector also has 95112-940805. doc -17 · 1244860 2 The color control section 6, test pattern image, 邛 7, projection device section 8, projection lens driving section 9, and projection lens 2 to be subjected to projection-related processing. Furthermore, the camera 1 is further provided with a camera section 3 and a detection section n that mainly perform processing related to the automatic adjustment function. In addition, the projector # is provided with an operation section 12 as a mechanism for receiving user operations; and a remote control light receiving section 13 of a remote controller (hereinafter referred to as a remote controller) 20. The overall control of the projector 1 is performed by the system control unit 10. The external connection unit 4 is connected to an external device that outputs an image for projection, inputs a rectangular image output from the device, and transmits the rectangular image to the image conversion unit 5. Image conversion ° 卩 5 Performs necessary conversion processing such as A / D conversion according to the control of the system control unit 10, and transmits the converted image to the projection device unit 8 The color control unit 6 adjusts the projection image Like color processing. Specifically, the color control unit 6 performs color correction of the projected image by adjusting the balance of each color of R (red), G (green), and B (blue) in accordance with the control of the system control unit 10. In addition, the test pattern image switching section 7 generates various test patterns required for the automatic adjustment function according to the control of the system control section 丨, and transmits the test patterns to the projection device section 8 as test pattern images. The projection device section 8 contains the image information (digital image data) to be projected in the spatial light modulation device 8 & for light modulation. Then, the projection device section 8 generates digital image data of various images transmitted from the image conversion section 5, the test pattern image switching section 7, and a system control section 10 described later, and performs light modulation on the spatial light modulation device 8a. Modulated light. In this way, the modulated light generated by the spatial light modulation device 8a of the projection device section 8 is projected to the external fluorescent light 95112-940805 through the projection lens 2. doc -18- 1244860 Acts. As a result, an image to be projected is projected on the screen s. The spatial light modulation device 8a usually uses a liquid crystal panel or a DMD (digital micromirror device). When a liquid crystal panel is used as a spatial light modulation device, the light from a light source is transmitted through each pixel in a state where each pixel corresponding to a point unit of digital data of an image to be projected is transmitted, and the entire image is projected and displayed. Modulated light, and finally project the image on the screen s. In addition, when DMD is used as the spatial light modulation device 8 &, the reflection angle of the micromirrow corresponding to the point unit of the digital data of the image to be projected is switched, and the light from the light source is reflected. The image to be projected is projected with the entire reflected light (modulated light) displayed, and finally the image is projected on the screen S. In addition, this embodiment adopts a structure using a liquid crystal panel as the spatial light modulation device 8a. In the following description, an image to be projected is also displayed as an image on a liquid crystal panel as the spatial light modulation device 8a. The displayed image transmits light from the light source, and is projected on the screen S by being projected from the projection lens 2. However, as described above, when dmd is used, the entire reflected light (modulated light) is displayed by switching the reflection angle of the tiny mirror corresponding to the pixels of the digital image data. Therefore, in the same manner as when the pixels are designated on the liquid crystal panel to correspond to the points of the digital image data, the DMD can also be designated to correspond to the points of the digital image data. Fig. 2 is a schematic diagram showing a pixel structure of a spatial light modulation device (hereinafter simply referred to as a panel) 8a made of a liquid crystal panel which the projection device section 8 has. An example of this embodiment is that the panel 8a is provided with 1024 pixels in the horizontal direction at 95112-940805. doc • 19- 1244860 is 768 pixels in the vertical direction, that is, the rectangular display range according to the XGA standard 'uses the pixel with the coordinate value (0, 0) in the upper left corner as the origin, and sets the horizontal direction as the X axis and vertical Panel coordinate system with y-axis orientation. Therefore, when the coordinate value of the panel coordinate system corresponding to each pixel in the horizontal direction and the vertical direction is sent from the system control section 10 to the projection device section 8, the projection device section 8 uses the coordinate value of the panel coordinate system in the panel coordinate system. The position and size of the image displayed on the display range of the panel 8a are specified above. If “127” is designated as the horizontal coordinate value from the system control section and “127” is designated as the vertical coordinate value, the projection device section 8 uses the upper left pixel of the panel 8 & as the origin point. Dots are displayed at the 128th pixel in the horizontal and vertical directions. In addition, when DMD is used as the spatial light modulation device 8 &, the same panel coordinate system as in the case of using the above-mentioned liquid crystal panel can be set. However, as described above, since the present embodiment adopts a structure using a liquid crystal panel as the spatial light modulation device 8a, in the following description, the structure using a liquid crystal panel as the spatial light modulation device 8a is also described, but the panel coordinate system The related concepts are basically the same whether a liquid crystal panel or a DMD is used as the spatial light modulation device 8a '. In addition to enlarging the lens 2, the light (modulated light) transmitted through the panel 8 & is projected onto the screen S as the original lens necessary for the image, and the lens for zoom (image size) adjustment and the focus adjustment are used. The lens is composed of several lenses, but it is not shown in the figure above. The projection lens driving unit 9 includes an actuator for changing the positions of the zoom king lens and the focus adjustment lens of the projection lens 2. The projection lens driving unit 9 is actuated by driving according to the control of the system control unit 10, 95112-940805. doc -20- 1244860 for zoom adjustment and focus adjustment. In addition, the camera section 3 shown in FIG. 1 captures various test pattern images projected on the screen S during automatic adjustment of projection preparation, and transmits the captured images to the detection section 11. In addition, the test pattern image projected from the projector, in addition to the aforementioned test pattern image for color correction and the test pattern for focus adjustment not shown in the figure, is also provided with a pattern diagram that also includes FIG. 3 Test pattern image 25 for zoom adjustment and keystone correction (Keystone correction). This test pattern image 25 has a test pattern (hereinafter referred to as a thick frame portion 25b) provided with a thick frame in the periphery corresponding to the outer contour of the projected image. In the following description, the color correction and focus adjustment processing using the test pattern image for color correction and the test pattern image for focus adjustment are basically irrelevant to the present invention, and therefore such processing is not described. The loose measurement section 11 analyzes a captured image delivered from the camera section 3. The image analysis was performed on a camera coordinate system. The camera coordinate system refers to a coordinate system provided in the camera section 3. More specifically, the camera coordinate system is a coordinate system of the shooting field of view of the camera section 3, and is the same as the panel coordinate system set in the aforementioned spatial light modulation device 8a, and the upper left corner of the camera section 3 is Origin coordinate system with X axis in horizontal direction and y axis in vertical direction. However, in fact, the camera base system is to set the upper left corner of the panel (CCD panel) of the imaging element of the camera unit 3 as the origin. This can be regarded as setting the camera coordinates on the image captured by the camera unit 3. In other words, based on the image taken by the camera section 3, the detection section 11 measures the Λ 軚 values of the four corner positions of the screen S on the camera coordinate system and the thickness of the test pattern image 25 in FIG. The frame portion 25b is based on 95112-940805 at that time. doc -21-1244860 The coordinates of the four angular positions of the image projected by the projector 1. In addition, it is necessary to detect these coordinates, such as the trapezoidal distortion of the screen s and the projected image (test pattern image 25 = thick frame center 5b). Of course, it can also be obtained by calculation based on the results. The detection unit 11 transmits the above detection results to the system control unit 10. The operating unit 12 of the projector 1 has several buttons and switches. When the user # makes these buttons and switches, he / she will receive instructions based on the operation of the operated buttons and switches, and send them to the system control unit. 10. In addition, the remote control light receiving section 13 receives operation signals from the remote control of the projector and transmits it to the system control section 10. FIG. 4 is a schematic diagram showing the appearance of the remote controller 20. As shown in Fig. 4, the remote controller 20 adopts a GUI method. In addition to several buttons, it also has up, down, left, right, and left selection keys 20a to 20d and an OK key 20e. With the selection keys 20a to 20d and With the operation of the OK key 20e, the user can select a desired item from among several items displayed on the menu image of the OSD (displayed on the screen) that was shot again from the projector 1. In addition, the 'operation section 12 is also provided with selection keys and determination keys, which are the same as those of the remote control 20. Therefore, when the operation section 12 and the remote controller 20 perform the same operation, the same instruction is given to the system control section 10. The system control unit 10 that performs the control of each of the above units includes a ROM 10a and a HAM 1 Ob. The ROM 10a stores in advance a program l0p (the computer program of the present invention) that specifies the control content performed by the system control unit 10, and displays various test pattern diagrams including the test pattern image 25 shown in FIG. 3 Feed for images and various menu images. The RAM 10b temporarily stores various data and the like generated under the control of the system control unit 10. 95112-940805. doc -22- 1244860 The system control unit 10 of the projector 1 of the present embodiment configured as described above, during normal automatic adjustment, performs the process shown in the flowchart of FIG. 5 to cause the projected image and the screen S to be the same. Of adjustment. The following processing is executed by the system control unit 10 based on the program 10p stored in the ROM 10a. First, the system control unit 10 projects a completely white image (step S1). The position of the four corners of the screen s on the camera coordinate system is detected by the detection section 11 analyzing the image captured by the camera section 3 in this state (step S2). This can be easily detected from the difference between the reflectance of screen S and its surroundings (such as the wall). Next, the 'system control unit 10' projects a test pattern image 25 for detecting the projected image frame including the thick frame portion 251) of the test pattern for projected image frame detection shown in Fig. 3 (step S3). The detection section 11 analyzes the image captured by the camera section 3 in this state, and detects the positions of the four corners of the thick frame section 25b of the test pattern for detecting the projected image frame on the camera coordinate system (step S4). This can be easily detected from the difference between the reflectance of the thick frame portion 25b of the test pattern for detecting the projected image frame and the surrounding reflectance. Next, the system control section performs zoom adjustment based on the positional relationship of the four corners of the thick frame section 25b of the test pattern for detecting the projected image frame on the camera coordinate system (step S5). The zoom adjustment, such as the thick frame of the test pattern for projected image frame detection, is 2 5 b. The end of the screen s is reached by zooming, and the thick frame part 25b of the test pattern for projected image frame detection is enlarged or reduced. Come on. After the zoom adjustment is performed, the detection unit u again analyzes and detects the positions of the four corners of the thick frame portion 25b of the test pattern for detecting the projected image frame on the camera coordinate system by using the image captured by the camera portion 3 ( Step% "from steps 95112-940805. doc -23 · 1244860 The position of the four corners of the screen s detected in step S2 on the camera coordinate system, and the thick frame 2 5 b after the zoom correction measured in step V 6 仏 are in the camera coordinate system. The positions of the four corners of the thick frame portion 25b of the test pattern for detecting the projected image frame after the zoom correction are determined on the panel coordinate system, that is, the coordinate values are determined (step S7). As a result, the image to be projected on the panel 8a is deformed and displayed opposite to the shape projected on the screen S. The system control unit 10 sequentially executes the above-mentioned series of processing. The projection device 48, according to the coordinate values provided by the system control unit 10, displays the image on the panel "and projects the image, which is the size of the screen S. Projection of a rectangular image with a trapezoidal distortion corrected in perfect conformity. With the above action, the projection preparation of the projector 1 is automatically completed. The above processing by the system control unit 10 is based on the previous general projection conditions, that is, a sufficient screen is obtained. When the distance between the projector 8 and the projector 1, specifically, 'the size of the projected image on the screen S is much larger than the size of the screen S, and when the keystone distortion is corrected, at least the size of the entire screen s can be projected' Processing of projection preparation that can be performed automatically. However, in the case where a sufficient distance between the screen S and the projector 1 cannot be obtained, the maximum size on the screen S after correcting the trapezoidal distortion of the projected image is sometimes smaller than the size of the screen s Therefore, the above-mentioned preparation process cannot be performed. Therefore, the projector 1 of the present invention cannot obtain a sufficient distance due to some circumstances between the projector 1 and the screen s. When the maximum size on the screen S after trapezoidal distortion of the projected image (projected image) is corrected is smaller than the size of the screen S, specifically, even if the thick frame portion 25b of the test pattern image 25 is projected at the maximum size, the screen S All four corners, or one of them is in the projected test pattern 95112-940805. doc -24- 1244860 When the thick frame portion 25b of the image 25 is outside, it is formed at the center portion of the screen s. Specifically, the center is uniform, and the image after correction of trapezoidal distortion can be projected smaller than the size of the screen S. 6 and 7 are schematic diagrams for specifically explaining the above-mentioned states. Fig. 6 is a pattern diagram when the thick frame portion 25b of the test pattern image 25 is projected from the front of the screen S to the state of the screen S. Since the projector 1 is not directly facing the screen S, the outline is outside the projected image (hereinafter referred to as the projected image PJ). At this time, it is a state where the thick frame portion 25b of the test pattern image 25 is trapezoidally distorted. Downcast. Fig. 7 is a schematic diagram showing a state where an image of the state shown in Fig. 6 is taken by the camera section 3 of the projector 1, that is, a state observed on the camera coordinate system. On the captured image 31, the thick frame portion 25b of the test pattern image 25 of the outer contour of the projected image PJ is photographed in a substantially rectangular shape, but it is photographed in a state where the screen s is large and trapezoidal distortion occurs. The state shown in FIG. 6 is that the projected image PJ cannot be projected when the projected image pj is projected at the maximum size. Specifically, the thick frame portion 25b of the test pattern image 25 and the screen S Projected with the same size. Therefore, in this case, the projector i of the present invention is shown in the schematic diagram of FIG. 8 by applying a well-known two-dimensional projection to the coordinate values of the four corners of the screen S on the panel coordinate system. Switch to make the center and screen S match, and set a virtual screen with the same aspect ratio as the aspect ratio of panel 83 (hereinafter referred to as the virtual reduced screen VS) with a size smaller than the screen S. Then, the projected image PJ after correcting the keystone distortion is projected in accordance with the size of the virtual reduced screen Vs. Specifically, for the fourth screen S on the image taken by the camera section 3 95112-940805. doc -25- 1244860 angular positions (hereinafter referred to as the coordinate values on the camera coordinate system), by applying a well-known one-dimensional projection scene > transformation, find the positions of the four corners of the virtual reduced screen Vs (camera ~ camera base 彳Coordinates of the display system) 'as a function of the reduction ratio, determine the coordinates of the four corners of the virtual reduction screen Vs, so that the four corner positions of the virtual reduction screen Vs (the coordinates of the camera coordinate system) and the correction trapezoid according to the reduction ratio The four angular positions (the coordinate values of the camera coordinate system) of the projected image PJ of the largest size after distortion are the same. Then, the well-known two-dimensional projection conversion is performed so that the four corners of the projected image PJ coincide with the four corners of the decided virtual reduction screen Vs. First, a description will be given of a calculation method for determining the four corner coordinate values of the virtual reduction screen Vs. Of course, this operation is performed by the system control unit 10 based on the result of analyzing the image captured by the camera unit 3 according to the detection unit Π. The input parameters are the coordinates of the four corners of the screen S on the camera coordinate system, and the coordinates of the four corners of the projected image PJ (specifically, the thick frame part 25b of the test pattern for the projected image frame detection). The resolutions of the panel 8aix and the y-direction of the projection unit 8 of the projector 1 are defined as follows (see FIG. 7). • The coordinates of the four corners of the screen s on the camera's coordinate system ... (sxl, syl), (sx2, sy2), (sx3, sy3), (sx4, sy4) • The projected image PJ on the camera's coordinate system Coordinates of the corners: (pjxl, pjyl), (pjx2, pjy2), (pjx3, pjy3), (pjX4, pjy4) • Resolution in the x direction of the panel · col (such as 1024 in XGA • • Refer to the figure 2) • Resolution in the y-direction of the panel: row (768 when XGA is used • Refer to Figure 2) Furthermore, as shown in Figure 2, the four corners of the panel 8a of the projection unit 8 (ρι, ρ2, P3, P4) The coordinate values (coordinate values on the panel coordinate system) are shown below, which can be 95112-940805. doc -26- 1244860 is expressed in the resolution (this embodiment is based on the resolution of the XGA standard), and each coordinate value after conversion (the coordinate value of the screen S on the camera coordinate system)

设為（Pxl，Pyl)，（Px2, Py2)，(Px3, Py3)，(Px4, Py4)。另外，PX 表示面板8a上任思位置之座標值（面板座標系統上之座標 值）’將其轉換後’亦即在攝影機座標系統上之座標值定義 為（LXX，LYY)。 面板四個角之面板—轉換後座標值 座標系統上之座標值（攝影機座標系統上之螢幕之座標 值） P1=(0, 0) — (Pxl， Pyl) P2 = (col，0) — (PX2, Py2) P3=(col, row) 一 (Px35 Py3) P4 = (0, row) — (Px4, Py4) PX=(LX，Ly) — (LXX，LYY) 但是，由於上述面板8a四個角之面板座標系統上之座標 值之轉換後座標值，係攝影機座標系統上之螢幕S之座標 值，因此以下之關係成立。Set to (Pxl, Pyl), (Px2, Py2), (Px3, Py3), (Px4, Py4). In addition, PX represents the coordinate value of the Rensie position on the panel 8a (the coordinate value on the panel coordinate system) ‘converted’, that is, the coordinate value on the camera coordinate system is defined as (LXX, LYY). Panels at the four corners of the panel—The coordinate values on the coordinate system after conversion (the coordinate values of the screen on the camera coordinate system) P1 = (0, 0) — (Pxl, Pyl) P2 = (col, 0) — ( PX2, Py2) P3 = (col, row)-(Px35 Py3) P4 = (0, row) — (Px4, Py4) PX = (LX, Ly) — (LXX, LYY) However, since the panel 8a above has four The converted coordinate value of the coordinate value on the panel coordinate system of the angle is the coordinate value of the screen S on the camera coordinate system, so the following relationship is established.

Pxl=sxl? Pyl=Syl Px2=sx2? Py2=sy2 Px3=sx3, Py3=sy3 Px4=sx4, Py4=sy4 八人將用於计异而規格化之座標值（計算用作標值）， 亦即將面板8a四個角之座標值（面板座標系統）轉換成χ，y軸 均係0與1間之值來求出規格化之值，上述轉換後座標值（攝 95112-940805.doc -27- 1244860 影機座標系統上之座標值）亦同樣地規格化。面板座標系統 上規袼化之座標值表示之面板四個角之位置pl，p2， 及面板上規格化之任意位置px之座標值作為原座標值（面 板座標值），將該原座標值與將轉換後座標值（攝影機座標系 統之座標值）規格化後之座標值表示如下。 原座標值：轉換後座標值 pl:(〇, 0):(xl，yl)其中（xl，yl) = (〇, 〇) p2:(l? 0):(x25 y2) p3:(l，1):(χ3, y3) p4:(0，1):(χ4, y4) px:(x，y):(xx，yy) 上述關係係使轉換後之1點（XI，yl)偏置成原座標系統 對應之1點（0,0)，使計算單純化者，係熟知之二維投影轉 換中一般之方法。規格化之轉換後座標值之χ，y之值χΐ， x2, χ3, χ4及yl，y2, y3, y4分別使用依據前述攝影機座標 系統上之螢幕s四個角之座標值（Pxl，Pyl)，（Px2，py2) (PX3，Py3)，（PX4，Py4)而表示如下。另外，w係轉換後座標 寬度（在攝影機座標系統上之螢幕S之寬度：乂方向之長 度），h係該高度（在攝影機座標系統上之螢幕s之高度：y 方向之長度）。 xl=0其中，xl=(Pxl —Pxl)/W x2 = (Px2— Pxl)/w x3 = (Px3 — Pxl)/w x4 = (Px4— Pxl)/w 95112-940805.doc -28- 1244860 yl=0其中 ’ yl=(Pyl —Pyl)/h y2 = (Py2- Pyl)/h y3 = (Py3 — Py l)/h y4 = (Py4 — Py l)/h 從上述關係求出將原座標值（面板座標系統上之座標值） 轉換成轉換後座標值（攝影機座標系統上之螢幕S之座標 值）用之轉換係數a，b，c，al，a2, bl，b2, a0, b0, c〇求出如 下。但是，此時由於係將原座標值（面板座標值）轉換成轉換 後座標值用之轉換係數，因此係求出正轉換係數。另外， a，b，c在熟知之二維投影轉換中，亦係為求減少重複計算而 使用之中間常數。 a=(x3 * y4 — x4 * y3)·•中間常數 b = (x2*y3 —x3*y2):中間常數 c = (x2 * y4 — X4 * y2):中間常數 al=a 氺 x2 a2 = a 木 y2 bl=b 氺 x4 b2=b * y4 a0= — b + c b0= — a+c c0=b + a— c ’、乂 求出對應於虛擬縮小螢幕Vs之四個角位置之投射 裝置部8之面板8&上之位置，亦即求出面板座標系統上之座 標值。另外，分別將對應於面板8a上之虛擬縮小螢幕％之 95112-940805.doc -29- 1244860 四個角位置之位置的座標俏中M / t 、值疋義為（small xi，small yi)(參 照圖2)，並將其正轉換座標佶旦 " 值（攝影機座標系統上之座標值） 定義成（virtual xi，virtual yi)(參照圖7)。其中，丨係丨，2, 3, 4， 所謂100%座標值，係指對應於螢幕s四個角位置之面板 上之位置之座標值，具體而言，係指面板8a之四個角之座 標值。 100 /。座私值—虛擬縮小螢幕之座標值—正轉換座標值 (面板上）座標值（面板座標系統）(攝影機座標系統） P1:(0, 〇)-(small xl5 small yl)-(virtual xl5 virtual yl) P2:(col5 0)-(small x25 small y2)-> (virtual x2, virtual y2) P3:(col, row)-(small x3, small y3)-(virtual x3, virtual y3) P4:(0，row)—(small x4，small y4)-> (virtual x4，virtual y4) 為求便於計算，設定為係數ctrx=c〇i/2，係數ctry=row/2， 進一步將虛擬縮小螢幕Vs之縮小比（可變值）設定為 scale(0G/◦…100%)時，面板8a上之，亦即面板座標系統上之 虛擬縮小勞幕Vs四個角之座標值（small xi，small yi)分別表 示如下。此時，由於虛擬縮小螢幕Vs之縮小比scale係 0%〜100%間之可變值，因此面板座標系統上之虛擬縮小螢 幕Vs四個角之座標值（small xi，small yi)形成縮小比SCale之 函數。 small xl=(0— ctrx)氺 scale/100 + ctrx small x2 = (col — ctrx) * scale/100 + ctrx small x3 = (col— ctrx)氺 scale/100+ctrx 95112-940805.doc -30- 1244860 small x4 = (0 — ctrx)本 scale/100 + ctrx small yl=(0— ctrx)氺 scale/100 + ctrx small y2 = (0— ctrx) * scale/100 + ctrx small y3 = (row— ctrx)* scale/100 + ctry small y4 = (row— ctrx)* scale/100 + ctry 其次，求出藉由攝影機部3拍攝之攝影機圖像31上之虛擬 縮小螢幕Vs四個角之座標值，亦即求出攝影機座標系統上 之虛擬縮小螢幕Vs四個角之座標值（virtual xi，virtual yi)。 具體而言，藉由對於上述獲得之面板8a上之面板座標系 統之虛擬縮小螢幕Vs四個角之座標值（small xi，small yi)分 別進行正轉換，來求出攝影機圖像上之，亦即攝影機座標 系統上之虛擬縮小螢幕Vs四個角之座標值（virtual xi， virtual yi)。其中，將面板座標（原座標）之任意點PX之座標 值LX，LY分別作為虛擬縮小螢幕Vs四個角之座標值small xl〜small x4，small yl〜small y4，將該面板座標（原座標）之 任意點PX之轉換後座標（攝影機座標系統上）之座標值LXX， LYY分別予以正轉換，作為攝影機座標系統上之虛擬縮小 營幕Vs四個角之座標值virtual xl〜virtual x4，virtual yl〜virtual y4，最後獲得攝影機座標系統上之虛擬縮小螢幕 Vs四個角之座標值LXX，LYY如下。 LX : small xl, small x2? small x3, small x4 LY : small yl，small y2，small y3，small y4 LXX : virtual xl，virtual x2，virtual x3，virtual x4 LYY : virtual yl, virtual y2, virtual y3? virtual y4 95112-940805.doc -31- 1244860 x=LX/col 其中，LX=0··· col y=LY/row 其中，LY=0 …rowPxl = sxl? Pyl = Syl Px2 = sx2? Py2 = sy2 Px3 = sx3, Py3 = sy3 Px4 = sx4, Py4 = sy4 Eight people will use the coordinate values that are different and normalized (the calculation is used as the standard value), also That is, the coordinates of the four corners of the panel 8a (panel coordinate system) are converted into χ, and the y-axis are all values between 0 and 1 to find the normalized value. -1244860 Coordinate values on the camera coordinate system) are also normalized. The coordinate values of the four corners of the panel indicated by the normalized coordinate values on the panel coordinate system are the original coordinate values (panel coordinate values). The normalized coordinate values (the coordinate values of the camera coordinate system) are expressed as follows. Original coordinate value: transformed coordinate value pl: (〇, 0): (xl, yl) where (xl, yl) = (〇, 〇) p2: (l? 0): (x25 y2) p3: (l, 1) :( χ3, y3) p4: (0,1) :( χ4, y4) px: (x, y) :( xx, yy) The above relationship offsets one point (XI, yl) after conversion The 1 point (0,0) corresponding to the original coordinate system makes the calculation simpler, which is a well-known general method in two-dimensional projection conversion. Normalized transformed coordinate values χ, y values χΐ, x2, χ3, χ4 and yl, y2, y3, y4 use the coordinate values (Pxl, Pyl) of the four corners of the screen s on the aforementioned camera coordinate system respectively (Px2, py2) (PX3, Py3), (PX4, Py4) are expressed as follows. In addition, w is the coordinate width after conversion (the width of the screen S on the camera coordinate system: the length in the 乂 direction), and h is the height (the height of the screen s on the camera coordinate system: the length in the y direction). xl = 0 where xl = (Pxl —Pxl) / W x2 = (Px2— Pxl) / w x3 = (Px3 — Pxl) / w x4 = (Px4— Pxl) / w 95112-940805.doc -28- 1244860 yl = 0 where 'yl = (Pyl —Pyl) / h y2 = (Py2- Pyl) / h y3 = (Py3 — Py l) / h y4 = (Py4 — Py l) / h Coordinate values (coordinates on the panel coordinate system) Conversion coefficients a, b, c, al, a2, bl, b2, a0, b0 for conversion to transformed coordinate values (coordinates of the screen S on the camera coordinate system) c0 is calculated as follows. However, at this time, since the original coordinate value (panel coordinate value) is converted into a conversion coefficient for the converted coordinate value, a positive conversion coefficient is obtained. In addition, in the well-known two-dimensional projection transformation, a, b, and c are also intermediate constants used to reduce repetitive calculations. a = (x3 * y4 — x4 * y3) · • Intermediate constant b = (x2 * y3 —x3 * y2): Intermediate constant c = (x2 * y4 — X4 * y2): Intermediate constant al = a 氺 x2 a2 = a wood y2 bl = b 氺 x4 b2 = b * y4 a0 = — b + c b0 = — a + c c0 = b + a— c ', 乂 find the projection corresponding to the four corner positions of the virtual reduced screen Vs The position on the panel 8 & of the device section 8 is to obtain the coordinate value on the panel coordinate system. In addition, the coordinates corresponding to the positions of the four corner positions of 9512-940805.doc -29- 1244860 on the panel 8a are respectively M / t and the value is defined as (small xi, small yi) ( (Refer to FIG. 2), and define its positive conversion coordinate value (the coordinate value on the camera coordinate system) as (virtual xi, virtual yi) (refer to FIG. 7). Among them, 丨 are 丨, 2, 3, 4, and the so-called 100% coordinate values refer to the coordinate values of the positions on the panel corresponding to the four corner positions of the screen s. Specifically, they refer to the four corners of the panel 8a. Coordinate value. 100 /. Coordinate private value—the coordinate value of the virtual reduced screen—positive conversion coordinate value (on the panel) coordinate value (panel coordinate system) (camera coordinate system) P1: (0, 〇)-(small xl5 small yl)-(virtual xl5 virtual yl) P2: (col5 0)-(small x25 small y2)-> (virtual x2, virtual y2) P3: (col, row)-(small x3, small y3)-(virtual x3, virtual y3) P4: (0, row) — (small x4, small y4)-> (virtual x4, virtual y4) For ease of calculation, set the coefficients ctrx = c〇i / 2, and the coefficients ctry = row / 2. When the reduction ratio (variable value) of the screen Vs is set to scale (0G / ◦ ... 100%), the coordinates on the panel 8a, that is, the coordinates of the four corners of the virtual reduction screen Vs (small xi, small yi) are shown below. At this time, since the reduction ratio scale of the virtual reduction screen Vs is a variable value between 0% and 100%, the coordinate values (small xi, small yi) of the four corners of the virtual reduction screen Vs on the panel coordinate system form a reduction ratio. SCale functions. small xl = (0— ctrx) 氺 scale / 100 + ctrx small x2 = (col — ctrx) * scale / 100 + ctrx small x3 = (col— ctrx) 氺 scale / 100 + ctrx 95112-940805.doc -30- 1244860 small x4 = (0 — ctrx) scale / 100 + ctrx small yl = (0— ctrx) 氺 scale / 100 + ctrx small y2 = (0— ctrx) * scale / 100 + ctrx small y3 = (row— ctrx ) * scale / 100 + ctry small y4 = (row— ctrx) * scale / 100 + ctry Second, find the coordinates of the four corners of the virtual reduced screen Vs on the camera image 31 captured by the camera section 3, and also That is, the coordinates (virtual xi, virtual yi) of the four corners of the virtual reduced screen Vs on the camera coordinate system are obtained. Specifically, the coordinate values (small xi, small yi) of the four corners of the virtual reduced screen Vs of the panel coordinate system on the panel 8a obtained above are respectively subjected to positive conversion to obtain the values on the camera image. That is, the coordinate values (virtual xi, virtual yi) of the four corners of the virtual reduced screen Vs on the camera coordinate system. Among them, the coordinate values LX, LY of any point PX of the panel coordinates (original coordinates) are used as the coordinates of the four corners of the virtual reduced screen Vs small xl ~ small x4, small yl ~ small y4, respectively, and the panel coordinates (original coordinates) The coordinate values LXX and LYY of the transformed coordinates (on the camera coordinate system) of PX at any point are positively converted, respectively, as the coordinate values of the four corners of the virtual zoom screen Vs on the camera coordinate system virtual xl ~ virtual x4, virtual yl ~ virtual y4. Finally, the coordinate values LXX and LYY of the four corners of the virtual reduced screen Vs on the camera coordinate system are obtained as follows. LX: small xl, small x2? Small x3, small x4 LY: small yl, small y2, small y3, small y4 LXX: virtual xl, virtual x2, virtual x3, virtual x4 LYY: virtual yl, virtual y2, virtual y3? virtual y4 95112-940805.doc -31- 1244860 x = LX / col where LX = 0 ··· col y = LY / row where LY = 0… row

z=a0 氺 x+bO 氺 y+cO xx=(al * x+bl * y)/z yy=(a2 氺 x+b2 木 y)/z 因此， LXX=col 氺 xx+Pxl LYY=row* yy+Pyl 亦即，藉由使LX為small xi(i為1，2, 3, 4)，來求出virtual xi作為LXX，並藉由使LY為small yi，來求出virtual yi作為 LYY。其中，如此求出之座標值（virtual xi，virtual yi)係縮 小比scale之函數。因此，不決定縮小比scaie，具體而言， 不決定虛擬縮小螢幕Vs對螢幕S之縮小比，即無法求出具體 之值。縮小比scale之決定進行如下。 在攝影機座標系統上，虛擬縮小螢幕Vs之四個角存在於 投射圖像PJ(具體而言係測試圖案圖像25之粗框部25b)之内 側日守’換5之’分別對應之座標值virtuai xi與pjxi之關係， 及virtual yi與pjyi之關係同時滿足下述全部8個條件時，即 可修正投射圖像PJ之梯形失真（參照圖7)。 (virtual xl - pjxi)> 〇， (virtual x2- pjx2)< 〇， (virtual x3- pjx3)< 〇， (virtual x4 — pjx4)> 〇， (virtual yl - pjyi)> 〇， 95112-940805.doc -32- 1244860 (virtual y2 — pjy2) > 0， (virtual y3 — pjy3) < 0，及 (virtual y4 — pjy4) < 0 o 同時滿足上述全部8個條件時，表示在攝影機座標系統 上’虛擬縮小螢幕VS之全部四個角均位於投射圖像pj内 側’反之’只要不滿足上述8個條件中之其中一個時，則表 示虛擬縮小螢幕Vs四個角之至少一個位於投射圖像pj外 側。因此，將縮小比scale自1〇〇〇/。起依序，如以，5%之 刻度階段性逐漸縮小’藉由反覆計算來求出前述攝影機座 標系統上之虛擬縮小螢幕Vs之座標值（Virtuai xi，virtual yi) ’換a之’向攝影機座標系統上之虛擬縮小螢幕Vs尺寸 階段性變小之側反覆進行上述計算時，即可求出滿足上述全 部8個條件之最大縮小比scale，同時亦可求出其縮小比 在攝衫機座}示糸統上之虛擬縮小榮幕V §四個角之座標值。 藉由以上方式求出攝影機座標系統上之虛擬縮小螢幕Vs 四個角之座標值（virtual xi，virtual yi)，另外，進行二維投 影轉換，使攝影機座標系統上之投射圖像pj(具體而言係測 試圖案圖像25之粗框部2513)之四個角（座標值為（pjxi，pjyi) 一致。藉此，投射圖像PJ修正梯形失真，並且以與虛擬縮 小螢幕Vs尺寸相同之大小，換言之，係在投射圖像^修正 梯形失真，並且其四個角與虛擬縮小螢幕Vs之四個角一致 狀態下進行投射。圖9係顯示其狀態之模式圖。另外，該二 維投影轉換係熟知之技術。 具體而言，藉由進行如下之運算，可使投射圖像pJ之四 95112-940805.doc -33· 1244860 個角與虛擬縮小螢幕Vs之四個角一致地進行投射。當然， 該運算係依據檢測部11分析攝影機部3拍攝之圖像的結 果，藉由系統控制部10來執行。 輸入參數係攝影機座標系統上之虛擬縮小螢幕Vs四個角 之座標值，投射圖像PJ四個角之座標值，以及面板8a之x方 向及y方向解像度。並分別定義如下。 •攝影機座標系統上之虛擬縮小螢幕Vs四個角（vp j， VP2, VP3, VP4)之座標值： (virtual xl, virtual yl),(virtual x2, virtual y2),(virtual χ3 virtual y3)，（virtual x4，virtual y4) •攝影機座標系統上之投射圖像PJ(粗框部25b)四個角之 座標值： (pjxl，pjyl)，(pjx2, pjy2)，(pjx3, pjy3)，(pjx4, pjy4) •面板之X方向解像度：col •面板之y方向解像度：row 其中一種面板解像度，於XGA時係col=1024, row=768(參 照圖2)。 此時，將攝影機座標系統上之虛擬縮小螢幕V s四個角 (VP1，VP2，VP3，VP4)之座標值（virtual xl，virtual yl)， (virtual x2? virtual y2), (virtual x3? virtual y3), (virtual x45 virtual y4)設為（Pxl，Pyl)，（Px2，Py2)，（Px3，Py3)，（Px4, Py4)，將各個轉換後座標值（面板座標系統上之座標值）設為 (0，0)，（col, 〇)，（col，row)，（0，row)。另外，PX係攝影機座 標系統上之任意位置之座標值。 95112-940805.doc -34- 1244860 攝影機座標系統上之虛擬縮小螢幕之座標值―轉換後座 ， 標值（面板座標系統上之座標值） VPl=(Pxl，Pyl)->(0, 0) VP2 = (Px2, Py2)—(col，0) VP3 = (Px35 Py3)->(col? row) VP4 = (Px4，Py4)->(0，row) PX=(LXX，LYY卜（LX，LY) 但是，由於上述攝影機座標系統上之虛擬縮小螢幕％四 個角（VP1，VP2, VP3, VP4)之座標值須與攝影機座標系統 # 上之投射圖像PJ四個角之座標一致，因此，以下之關係成 立。z = a0 氺 x + bO 氺 y + cO xx = (al * x + bl * y) / z yy = (a2 氺 x + b2 wood y) / z Therefore, LXX = col 氺 xx + Pxl LYY = row * yy + Pyl That is, by making LX small xi (i is 1, 2, 3, 4), find virtual xi as LXX, and by making LY small yi, find virtual yi as LYY. Among them, the coordinate value (virtual xi, virtual yi) obtained in this way is a function of the reduction ratio scale. Therefore, the reduction ratio scaie is not determined, specifically, the reduction ratio of the virtual reduction screen Vs to the screen S is not determined, that is, a specific value cannot be obtained. The determination of the reduction ratio scale is performed as follows. On the camera coordinate system, the four corners of the virtual reduced screen Vs exist on the inside of the projected image PJ (specifically, the thick frame portion 25b of the test pattern image 25). When the relationship between virtuai xi and pjxi and the relationship between virtual yi and pjyi simultaneously satisfy all eight conditions described below, the trapezoidal distortion of the projected image PJ can be corrected (see FIG. 7). (virtual xl-pjxi) > 〇, (virtual x2- pjx2) < 〇, (virtual x3- pjx3) < 〇, (virtual x4-pjx4) > 〇, (virtual yl-pjyi) > 〇, 95112-940805.doc -32- 1244860 (virtual y2 — pjy2) > 0, (virtual y3 — pjy3) < 0, and (virtual y4 — pjy4) < 0 o When all 8 conditions are met at the same time, it means On the camera coordinate system, 'all four corners of the virtual reduced screen VS are located inside the projected image pj.' Conversely 'as long as one of the above 8 conditions is not met, it means that at least one of the four corners of the virtual reduced screen Vs Located outside the projected image pj. Therefore, the ratio will be reduced from 1000 /. In order, for example, the 5% scale is gradually reduced gradually. Through repeated calculations, the coordinate value of the virtual zoom screen Vs on the aforementioned camera coordinate system (Virtuai xi, virtual yi) is changed to the camera. When the above calculation is repeated on the side of the virtual reduction screen Vs size that is gradually reduced on the coordinate system, the maximum reduction ratio scale that meets all the above 8 conditions can be obtained, and the reduction ratio can also be obtained on the camera base. } Show the virtual reduction of the glory V on the system § The coordinates of the four corners. The coordinates of the four corners (virtual xi, virtual yi) of the virtual reduced screen Vs on the camera coordinate system are obtained in the above manner, and two-dimensional projection conversion is performed to make the projected image pj on the camera coordinate system (specific and The four corners (coordinate values of (pjxi, pjyi)) of the thick frame portion 2513) of the test pattern image 25 are the same. In this way, the projected image PJ corrects the trapezoidal distortion and has the same size as the virtual reduced screen Vs size In other words, the projection is performed in a state where the projected image is corrected with trapezoidal distortion and its four corners coincide with the four corners of the virtual reduced screen Vs. Fig. 9 is a schematic diagram showing the state. In addition, the two-dimensional projection conversion It is a well-known technology. Specifically, by performing the following calculations, the four corners of the projected image pJ 95112-940805.doc -33 · 1244860 can be projected in unison with the four corners of the virtual reduced screen Vs. Of course This calculation is based on the result of analyzing the image captured by the camera section 3 based on the detection section 11 and executed by the system control section 10. The input parameters are the four corners of the virtual reduction screen Vs on the camera coordinate system. Coordinate values of the four corners of the projected image PJ, and the x- and y-direction resolutions of the panel 8a. They are defined as follows. • The virtual zoom screen Vs four corners (vp j, VP2, VP3, VP4) coordinate values: (virtual xl, virtual yl), (virtual x2, virtual y2), (virtual χ3 virtual y3), (virtual x4, virtual y4) • Projection image PJ (rough on the camera coordinate system) Frame 25b) Coordinate values of the four corners: (pjxl, pjyl), (pjx2, pjy2), (pjx3, pjy3), (pjx4, pjy4) • Resolution in the X direction of the panel: col • Resolution in the y direction of the panel: row One of the panel resolutions is col = 1024 and row = 768 at XGA (see Figure 2). At this time, the coordinates of the four corners (VP1, VP2, VP3, VP4) of the virtual zoom screen Vs on the camera coordinate system are coordinated. The values (virtual xl, virtual yl), (virtual x2? Virtual y2), (virtual x3? Virtual y3), (virtual x45 virtual y4) are set to (Pxl, Pyl), (Px2, Py2), (Px3, Py3) , (Px4, Py4), set each transformed coordinate value (the coordinate value on the panel coordinate system) to (0, 0), (col, 〇), col, row), (0, row). In addition, PX is the coordinate value of any position on the camera coordinate system. 95112-940805.doc -34- 1244860 The coordinate value of the virtual zoom-out screen on the camera coordinate system-after conversion, the coordinate value (the coordinate value on the panel coordinate system) VPl = (Pxl, Pyl)-> (0, 0 ) VP2 = (Px2, Py2) — (col, 0) VP3 = (Px35 Py3)-> (col? Row) VP4 = (Px4, Py4)-> (0, row) PX = (LXX, LYY (LX, LY) However, due to the above-mentioned virtual reduction screen on the camera coordinate system, the coordinates of the four corners (VP1, VP2, VP3, VP4) must match the coordinates of the four corners of the projected image PJ on the camera coordinate system # They agree, so the following relationship holds.

Pxl=pjxl，Pyl=pjylPxl = pjxl, Pyl = pjyl

Px2=pjx2，Py2=pjy2 Px3=pjx3, Py3=pjy3 Px4=pjx4, Py4=pjy4 其次，將用於計算而規格化之座標值（計算用作標值）， 亦即將攝影機座標系統上之虛擬縮小螢幕Vs四個角之座標修 轉換成x，y軸均係〇與1間之值來求出規格化之值，上述轉換 後座標值之面板座標值亦同樣地規格化。將如此規格化之 座標值表示之攝影機座標系統上之虛擬縮小螢幕Vs四個角 P1’ p2’ p3，p4及攝影機座標系統上之規格化之任意點^乂之 座標值作為原座標（攝影機座標系統），將該原座標之座標值 與轉換後座標值（面板座標系統之座標值）予以規格化後之 座標值表示如下。 95112-940805.doc -35- 1244860 原座標值：轉換後座標值 pl:(0, 0):(xl，yl)其中（xl，yl) = (〇, 〇) p2:(l，0):(x2, y2) ρ3:(1，1):(χ3, y3) ρ4:(0，1):(χ4, y4) ρχ··(χ，y):(xx，yy) 上述關係係使轉換後之Ui(xl，yl)偏置成原座標系統上 對應之1點（0, 0)，使計算單純化者，係熟知之二維投影轉 換中一般之方法。規格化之轉換後座標值之X，y之值xl， x3, x4及yl，y2, y3, y4分別使用前述攝影機座標系統上之虛 擬縮小螢幕Vs四個角之座標值（Ρχ1，pyl)，（ρχ2, py2)，（ρχ3, Py3)，（Px4, Py4)而表示如下。Px2 = pjx2, Py2 = pjy2 Px3 = pjx3, Py3 = pjy3 Px4 = pjx4, Py4 = pjy4 Secondly, the coordinate values normalized for calculation (calculation is used as the standard value) will also be the virtual reduction on the camera coordinate system The coordinates of the four corners of the screen Vs are converted into x and y axes. The values are between 0 and 1 to find the normalized values. The panel coordinate values of the converted coordinates are also normalized. The virtual reduced screen Vs four corners P1 'p2' p3, p4 on the camera coordinate system represented by such normalized coordinate values and the normalized arbitrary points on the camera coordinate system ^ 乂 coordinate values are used as the original coordinates (camera coordinates System), the coordinate value of the original coordinate value and the transformed coordinate value (the coordinate value of the panel coordinate system) are standardized as follows. 95112-940805.doc -35- 1244860 Original coordinate value: coordinate value after conversion pl: (0, 0) :( xl, yl) where (xl, yl) = (〇, 〇) p2: (l, 0): (x2, y2) ρ3: (1,1) :( χ3, y3) ρ4: (0,1) :( χ4, y4) ρχ · (χ, y) :( xx, yy) The subsequent Ui (xl, yl) is offset to the corresponding 1 point (0, 0) on the original coordinate system, so that the simplification of the calculation is a well-known general method in two-dimensional projection conversion. The normalized transformed coordinate values of X, y, xl, x3, x4 and yl, y2, y3, y4 use the coordinate values (Pχ1, pyl) of the four corners of the virtual reduced screen Vs on the aforementioned camera coordinate system, respectively, (Ρχ2, py2), (ρχ3, Py3), (Px4, Py4) are expressed as follows.

Xl=0其中 ’ xl=(Pxl — pxl)/c〇l x2 = (Px2— Pxl)/c〇l x3=(Px3 — Pxl)/col x4 = (Px4- Pxl)/col yl=〇其中，y1==(Pyl — Pyl)/r〇w y2 = (Py2- Pyl)/r〇w y3 = (Py3-Pyl)/r〇w y4 = (Py4- Pyl)/r〇w 從上述關係求出將原座標值（攝影機座標系統）轉換成轉 換後座標值（面板座標系統上之虛擬縮小螢幕化之座標值） 用之轉換係數a，b，c，a1，a2, bl，b2, a〇, b〇, c〇求出如下。但 是，此時由於係將原座標值（攝影機座標系統上之虛擬縮小 95112-940805.doc -36- !244860 螢幕Vs之座標值）轉換成轉換後座標值（面板座標系統）用之 · 轉換係數，因此係求出正轉換係數。此外，同時亦求出逆 轉換係數11&0，1113〇，11(：0，11&1，11131，11&2，1162。另外，&13， c在熟知之二維投影轉換中，亦係為求減少重複計算而使用 · 之中間常數。 •正轉換係數 a=(x3 * y4 — x4 * y3):中間常數 b=(x2 * y3 - x3 * y2):中間常數 c=(x2 * y4 — x4 * y2):中間常數 _ al=a * x2 a2 = a 氺 y2 bl=b 氺 x4 b2=b * y4 aO= — b + c bO= — a+c cO=b + a— c •逆轉換係數 · n aO: (aO* b2 — a2* b2) n bO = (al * bO — aO* bl) n c0 = (a2* bl — al * b2) 其次，藉由將攝影機座標系統上之虛擬縮小螢幕％四個 角之座標值予以逆轉換，算出面板座標系統上對應之座標 值。但是，將攝影機座標系統上（原座標）之任意點？又之座 標值LXX，LYY分別作為虛擬縮小螢幕％四個角之座標值 95112-940805.doc -37- 1244860 sxi，syi，藉由將其予以逆轉換，最後獲得對應於攝影機座 標系統上之虛擬縮小螢幕Vsw個角之面板座標系統上四個 角之座標值LX，LY如下。 xx=(LXX-Pxl)/c〇l其中，lxx=0…c〇1 yy=(LYY—Pyl)/row其中，LYY=0.“row zz=n a0 氺 χχ+η b0 氺 yy+n e0 x=(n al * χχ+n bl * yy)/zz y=(n a2 * xx+n b2 * yy)/zz 因此， LX=col 氺 x LY=row 木 y 藉由以上方式，可使投射圖像PJ與虛擬縮小螢幕％一致 地，更具體而言，可使投射圖像Pj之四個角與虛擬縮小螢 幕Vs之四個角一致地投射。 圖10係顯示本發明之投影機自動調整時之系統控制部之 處理步驟之流程圖。亦即，如上述，圖1 〇係在將投射圖像 PJ亦經過梯形失真修正狀態下，在螢幕s上以與虛擬縮小螢 幕Vs—致之尺寸，具體而言，係在投射圖像PJ之四個角亦 經過修正狀態下，亦包含顯示成與螢幕S上之虛擬縮小螢幕 Vs之四個角一致之處理之系統控制部10之處理步驟之流程 圖。另外，該流程圖顯示之控制係依據收納於ROM 10a之程 式1 Op進行處理。 另外’本實施形態之系統控制部1 0係構成依據收納於 ROMlOa之程式l〇p處理各步驟，不過，本發明之投影機當 95112-940805.doc -38- 1244860 二α如用刀別以專用之硬體（專用電路）處理此等步驟内 —部分或全部之構造。 12:先’使用者將投影機1設置於螢幕S前方，操作操作部 /遙控器20’將進行投射準備之自動調整之指示送至投 敕幾系統控制部10監視是否受理進行投射準備之自動調 '敕彳日不及其他指不（步驟SU)。受理進行投射準備之自動 肩整之指*以外之指示時（在步驟si i中為n〇)，系統控制部 10執仃對應於受理指示之處理（步驟S12)。受理進行投射準 2之自動調整之指示時（步驟Su中為YES)，系統控制部Μ 田然係進订對色修正及焦點調整項目之自動調整，並開始 進仃使投射圖像PJ，具體而言係使測試圖案圖像25之粗框 部2讣之四個角與上述虛擬縮小螢幕VS之四個角一致之調 整（步驟S13)。另外，在以下說明中省略色修正及焦點調整 之相關說明。 開始自動調整時，系統控制部1〇首先自攝影機部3拍攝之 圖像檢測螢幕S四個角在攝影機座標系統上之位置（座標 值）（步驟S 14)，其次，檢測投射圖像框檢測用之測試圖案之 粗框部25b四個角在攝影機座標系統上之位置（座標值）（步 驟S15) 查兩者之關係，亦即檢查攝影機座標系統上之 螢幕S四個角之位置與投射圖像框檢測用之測試圖案之粗 框部25b四個角之位置之關係（步驟S16)。此等系統控制部 10檢測螢幕S及投射之粗框部25b四個角在攝影機座標系統 上之位置（座標值）之處理，與前述圖5之流程圖同樣地進 行。結果攝影機座標系統上之螢幕S全部四個角均位於投射 95112-940805.doc -39- 1244860 圖像框檢測用之測試圖案之粗框部25b内側時(步驟“7中 為NO)，系統控制部1G進行_般調整，亦即進行—般之自動 調整成使大於螢幕S之投射圖像pj與螢幕s之尺寸一致（變 焦調整及梯形失真修正）（步驟S21)。而後，可依據使用者之 指示將自外部連接部4輸入之各種圖像投射至螢幕s上之虛 擬縮小螢幕Vs上，因此係藉由檢測部丨丨之指示開始進行圖 像投射（步驟S20)。 另外，攝影機座標系統上之螢幕8四個角之其中一個位於 投射圖像框檢測用之測試圖案之粗框部25b外側時（步驟 S17中為YES)，系統控制部10係進行投射圖像至螢幕s中央 用之自動調整。亦即，系統控制部10首先如前述，在攝影 機座標糸統上’虛擬縮小螢幕V s之四個角存在於投射圖像 框檢測用之測試圖案圖像25之粗框部25b内側時，換言之， 各個對應之座標值virtual xi與pjxi之關係，及virtual yi與 pjyi之關係同時滿足下述全部8個條件時，即可修正投射圖 像PJ之梯形失真，因此係決定螢幕S上之虛擬縮小螢幕Vs 四個角成滿足此種條件（步驟S 18)。 而後，進行變焦調整及梯形失真修正，使投射圖像框檢 測用之測試圖案圖像25之粗框部25b之四個角與決定之虛 擬縮小螢幕Vs四個角一致（步驟S19)。而後，可依據使用者 之指示，將自外部連接部4輸入之各種圖像投射至螢幕S上 之虛擬縮小螢幕Vs，因此，係藉由檢測部11之指示開始投 射圖像（步驟S20)。 另外，上述實施形態係說明自一個投影機1投射投射圖像 95112-940805.doc -40 - 1244860 PJ至螢幕S中央之構造，不過藉由應用本發明，亦可自數個 投影機不重疊地並列投射投射圖像在一個螢幕上。 另外，上述實施形態係依據攝影機部3拍攝之圖像來設定 虛擬縮小螢幕Vs(虛擬投射框），不過，藉由構成關於螢幕 S(被投射體），如在螢幕S四個角設置光二極體等光檢測感 測器’來檢測螢幕S四個角之位置，關於投射圖像（具體而 吕係測試圖案25之粗框部25b)，係藉由變焦操作及透鏡移 位操作等來檢測四個角，亦可適用本發明。 此外，上述實施形態係藉由使投射圖像（具體而言係測試 圖案25之粗框部25b)之四個角與虛擬縮小螢幕vs(虛擬投 射框）之四個角一致，來修正投射圖像之梯形失真，不過當 然亦可利用虛擬縮小螢幕Vs在變焦調整上。此種情況下， 可在使投射圖像之中心與螢幕S(被投射體）中心一致狀態 下來進行變焦調整。 【圖式簡單說明】 圖！係顯示本發明之投影機一種實施形態之内部構造例 之區塊圖。 圖2係顯示本發明之投影機之投射裝置部具有之液晶面 板製之空間光調制裝置（面板）之像素構造之模式圖。 圖3係在本發明之投影機中兼具變焦調整及梯形失真修 正（Keystone修正）用之測試圖案圖像之模式圖。 置外觀之模式圖。 動調整時進行之處 圖4係顯示本發明之投影機之遙控I 圖5係顯示本發明之投影機在_ 理步驟之流程圖。 95112-940805.doc 1244860 圖6係自螢幕正面觀察投射測試圖案圖像之粗框部至螢 幕狀恶時之模式圖。 圖7係.、，、員示在攝影機座標系統上觀察圖6所示狀態之狀態 之模式圖。 圖8係顯示在面板座標系統上，對螢幕之四個角之座標 值使用热知之二維投影轉換，來設定虛擬縮小螢幕之座 標值之狀態之模式圖。 圖9係顯示進行二維投影轉換，使投射圖像之四個角與攝 影機座標m之虛擬縮小螢幕之四個角之座標值一致之 狀態之模式圖。 圖10係顯示本發明之投影機自動調整時系統控制部執行 本發明之電腦程式之處理步驟之流程圖。 【主要元件符號說明】 1 投影機 2 投射透鏡 3 攝影機部 8 投射裝置部 8a 空間光調制裝置（面板） 10 系統控制部 10p 程式 11 檢測部 12 操作部 25 測試圖案圖像 25b (測試圖案圖像之）粗框吾 95112-940805.doc •42- 1244860 s 螢幕 Vs 虛擬縮小螢幕 PJ 投射圖像Xl = 0 where 'xl = (Pxl — pxl) / c〇l x2 = (Px2 — Pxl) / c〇l x3 = (Px3 — Pxl) / col x4 = (Px4- Pxl) / col yl = 〇 where, y1 == (Pyl — Pyl) / r〇w y2 = (Py2- Pyl) / r〇w y3 = (Py3-Pyl) / r〇w y4 = (Py4- Pyl) / r〇w Calculated from the above relationship The conversion coefficients a, b, c, a1, a2, bl, b2, a〇, are used to convert the original coordinate values (camera coordinate system) into transformed coordinate values (virtual zoomed-out coordinate values on the panel coordinate system). b0, c0 were obtained as follows. However, at this time, the original coordinate value (the virtual reduction on the camera coordinate system 95112-940805.doc -36-! 244860 screen Vs coordinate value) is converted into the converted coordinate value (panel coordinate system). Conversion factor , So the positive conversion coefficient is obtained. In addition, the inverse conversion coefficients 11 & 0,1113〇, 11 (: 0,11 & 1,11131,11 & 2,1162) are also obtained at the same time. In addition, & 13, c is also known in the two-dimensional projection transformation, The intermediate constant used to reduce repetitive calculations. • Positive conversion coefficient a = (x3 * y4 — x4 * y3): intermediate constant b = (x2 * y3-x3 * y2): intermediate constant c = (x2 * y4 — x4 * y2): intermediate constant_ al = a * x2 a2 = a 氺 y2 bl = b 氺 x4 b2 = b * y4 aO = — b + c bO = — a + c cO = b + a— c • Inverse conversion coefficient · n aO: (aO * b2 — a2 * b2) n bO = (al * bO — aO * bl) n c0 = (a2 * bl — al * b2) Second, by The coordinates of the four corners of the virtual zoom-out screen are inversely converted to calculate the corresponding coordinate values on the panel coordinate system. However, any point on the camera coordinate system (original coordinates)? And the coordinate values LXX and LYY are used as virtual zoom-outs, respectively. The coordinates of the four corners of the screen% are 95112-940805.doc -37- 1244860 sxi, syi. By inversely converting them, we finally get the corresponding Vsw corners of the virtual reduced screen on the camera coordinate system. The coordinate values LX, LY of the four corners on the board coordinate system are as follows: xx = (LXX-Pxl) / c〇l where lxx = 0 ... c〇1 yy = (LYY-Pyl) / row where LYY = 0. "Row zz = n a0 氺 χχ + η b0 氺 yy + n e0 x = (n al * χχ + n bl * yy) / zz y = (n a2 * xx + n b2 * yy) / zz Therefore, LX = col 氺 x LY = row Wood y By the above method, the projected image PJ can be consistent with the virtual reduced screen%, more specifically, the four corners of the projected image Pj and the four of the virtual reduced screen Vs can be made consistent. The angles are projected uniformly. Fig. 10 is a flowchart showing the processing steps of the system control unit when the projector of the present invention is automatically adjusted. That is, as described above, Fig. 10 is a state in which the projected image PJ is also subjected to keystone distortion correction. Next, the size on the screen s is the same as the virtual reduction screen Vs. Specifically, the four corners of the projected image PJ are also corrected, and the virtual reduction screen Vs displayed on the screen S is also included. The flowchart of the processing steps of the system control unit 10 whose four corners are consistent. In addition, the control shown in the flowchart is processed according to the program 1 Op stored in the ROM 10a. In addition, the system control unit 10 of this embodiment is configured to process each step according to the program 10p stored in the ROM 10a. However, the projector of the present invention is 95112-940805.doc -38- 1244860. Dedicated hardware (dedicated circuitry) handles these steps—some or all of the construction. 12: First, "the user sets the projector 1 in front of the screen S, and operates the operation section / remote control 20" to send an instruction for automatic adjustment of projection preparation to the projection system control section 10 to monitor whether or not to accept automatic projection preparation Adjust the next day's time to others (step SU). When an instruction other than the automatic shoulder adjustment finger * for the projection preparation is accepted (no in step si i), the system control unit 10 executes a process corresponding to the acceptance instruction (step S12). When accepting the instruction for automatic adjustment of projection standard 2 (YES in step Su), the system control unit M Tian Ran has made automatic adjustments to the color correction and focus adjustment items, and started to make the projected image PJ. Specifically, In other words, the four corners of the thick frame portion 2 讣 of the test pattern image 25 are adjusted to coincide with the four corners of the virtual reduced screen VS (step S13). In addition, the description of color correction and focus adjustment is omitted in the following description. When automatic adjustment is started, the system control unit 10 first detects the positions (coordinate values) of the four corners of the screen S on the camera coordinate system from the image taken by the camera unit 3 (step S 14), and then detects the projected image frame detection. The position (coordinate value) of the four corners of the thick frame portion 25b of the test pattern on the camera coordinate system (step S15). Check the relationship between the two, that is, check the position and projection of the four corners of the screen S on the camera coordinate system The relationship between the positions of the four corners of the thick frame portion 25b of the test pattern for image frame detection (step S16). The processing of the system control unit 10 to detect the positions (coordinate values) of the four corners of the screen S and the projected thick frame portion 25b on the camera coordinate system is performed in the same manner as the flowchart of FIG. 5 described above. Result When all four corners of the screen S on the camera coordinate system are located inside the thick frame portion 25b of the test pattern for projecting the image frame detection 95112-940805.doc -39- 1244860 (NO in step "7), the system controls The unit 1G performs general adjustment, that is, automatic adjustment so that the projected image pj larger than the screen S is consistent with the size of the screen s (zoom adjustment and keystone correction) (step S21). Then, according to the user The instructions project various images input from the external connection section 4 to the virtual reduced screen Vs on the screen s, so the image projection is started by the instructions of the detection section 丨 (step S20). In addition, the camera coordinate system When one of the four corners of the upper screen 8 is located outside the thick frame portion 25b of the test pattern for detecting the projected image frame (YES in step S17), the system control unit 10 performs projected images to the center of the screen s That is, the system control unit 10 firstly, as described above, on the camera coordinate system, the four corners of the “virtual reduction screen V s” exist in the thick frame portion 25 b of the test pattern image 25 for detecting the projected image frame. In other words, in other words, the relationship between the corresponding coordinate values virtual xi and pjxi, and the relationship between virtual yi and pjyi simultaneously satisfy all 8 conditions described below, the trapezoidal distortion of the projected image PJ can be corrected, so the screen S is determined. The four corners of the virtual reduction screen Vs above satisfy this condition (step S 18). Then, the zoom adjustment and keystone correction are performed to make the four thick four portions 25b of the test pattern image 25 for projected image frame detection. The corners are consistent with the four corners of the determined virtual reduction screen Vs (step S19). Then, various images input from the external connection portion 4 can be projected onto the virtual reduction screen Vs on the screen S according to the instruction of the user. The image is projected by the instruction of the detection unit 11 (step S20). In addition, the above-mentioned embodiment describes the structure in which the projected image is projected from one projector 1 95112-940805.doc -40-1244860 PJ to the center of the screen S However, by applying the present invention, it is also possible to project a projected image on a screen in parallel from a plurality of projectors without overlapping. In addition, the above embodiment is based on the image captured by the camera section 3. The virtual reduction screen Vs (virtual projection frame) is set. However, by constituting the screen S (projected object), for example, light detection sensors such as light diodes are installed at the four corners of the screen S to detect the four corners of the screen S. For the position of the projected image (specifically, the thick frame portion 25b of the Lu system test pattern 25), the four angles are detected by a zoom operation, a lens shift operation, and the like, and the present invention is also applicable. The keystone distortion of the projected image is corrected by matching the four corners of the projected image (specifically, the thick frame portion 25b of the test pattern 25) with the four corners of the virtual reduced screen vs (virtual projected frame), But of course, you can also use the virtual reduction screen Vs for zoom adjustment. In this case, you can adjust the zoom with the center of the projected image aligned with the center of the screen S (projected body). [Schematic description] Figure! It is a block diagram showing an example of the internal structure of an embodiment of the projector of the present invention. Fig. 2 is a schematic diagram showing a pixel structure of a spatial light modulation device (panel) made of a liquid crystal panel provided in a projection device portion of the projector of the present invention. Fig. 3 is a schematic diagram of a test pattern image used for both zoom adjustment and keystone correction (Keystone correction) in the projector of the present invention. Set appearance pattern diagram. Fig. 4 shows the remote control of the projector of the present invention. Fig. 5 is a flowchart showing the processing steps of the projector of the present invention. 95112-940805.doc 1244860 Figure 6 shows the pattern from the thick frame of the projected test pattern image to the screen when viewed from the front of the screen. Fig. 7 is a schematic diagram showing the state shown in Fig. 6 on the camera coordinate system. Fig. 8 is a schematic diagram showing the state of setting the coordinates of the virtual screen by using the two-dimensional projection conversion of the heat of the coordinates of the four corners of the screen on the panel coordinate system. Fig. 9 is a pattern diagram showing a state in which two-dimensional projection conversion is performed to make the four corners of the projected image coincide with the four corners of the virtual reduction screen of the camera coordinate m. Fig. 10 is a flowchart showing the processing steps of the computer program of the present invention executed by the system control unit when the projector of the present invention is automatically adjusted. [Description of main component symbols] 1 Projector 2 Projection lens 3 Camera section 8 Projection device section 8a Spatial light modulation device (panel) 10 System control section 10p Program 11 Detection section 12 Operation section 25 Test pattern image 25b (Test pattern image (The) thick frame I 95112-940805.doc • 42- 1244860 s screen Vs virtual reduced screen PJ projected image

95112-940805.doc -43 -95112-940805.doc -43-

Claims (1)

1244860 十、申請專利範圍： 1 · 一種圖像投射方法，係依據顯示投射至矩形狀被投射體 之矩形狀投射圖像之資訊，使空間光調制機構生成調制 光’使投射透鏡投射前述空間光調制機構生成之調制光 至前述矩形狀之被投射體時，依據顯示將前述矩形狀之 投射圖像變形後之圖像之資訊，使前述空間光調制機構 生成調制光，而在前述被投射體上投射成矩形狀之圖 像，其特徵為： 在前述空間光調制機構上設定具有與前述矩形狀之投 射圖像相同之縱橫尺寸比，於投射至前述矩形狀之被投 射體時，在小於前述矩形狀被投射體之尺寸，並使中心 與前述矩形狀被投射體之中心一致狀態下，成為矩形狀 之虛擬投射框。 2· 一種圖像投射方法，係依據顯示投射至矩形狀被投射體 之矩形狀投射圖像之資訊，使空間光調制機構生成調制 光’使投射透鏡投射該空間光調制機構生成之調制光至 前述矩形狀被投射體時，依據顯示將前述矩形狀之投射 圖像變形後之圖像之資訊，使前述空間光調制機構生成 調制光，而在前述被投射體上投射成矩形之圖像，其特 徵為： 在前述空間光調制機構上設定具有與前述矩形狀之投 射圖像相同之縱橫尺寸比，於投射至前述矩形狀之被投 射體時，在小於前述矩形狀被投射體之尺寸，並使中心 與前述矩形狀被投射體之中心一致狀態下，成為矩形狀 95112-940805.doc 1244860 之虛擬投射框； 運异前述空間光調制機構上之前述矩形狀投射圖像之 麦形里’使W述矩形狀投射圖像之四個角與設定於前述 空間光調制機構上之虛擬投射框之四個角一致。 3·如請求項1或2之圖像投射方法，其中以拍攝機構拍攝圖 像，该圖像包含：依據顯示未變形之前述投射圖像之資 〇Tl使刖述空間光調制機構生成調制光，將前述空間光 凋制機構生成之調制光通過前述投射透鏡而以最大尺寸 扠射至前述被投射體時之前述投射圖像之四個角位置，· 及則述被投射體之四個角位置； 自則述拍攝機構拍攝之圖像，在設定於前述拍攝機構 之座標系統上指定前述被投射體之四個角位置及前述投 射圖像之四個角位置； 在前述座標系統上指定之前述被投射體之四個角位置 内之至少一個存在於在前述座標系統上指定之前述投射 圖像之四個角位置之外側時，在前述空間光調制機構上 設定前述虛擬投射框。 4.如請求項3之圖像投射方法，其中依據在前述座標系統上 指定之前述被投射體四個角之位置及前述投射圖像四個 角之位置，在前述空間光調制機構上設定最大尺寸之虛 擬投射框。 1 5.如請求項4之圖像投射方法，其中藉由階段性縮小將在前 述座標系統上指定之前述被投射體之縱橫尺寸比轉換成 刖述投射圖像之縱橫尺寸比之虛擬投射框，㊉據階段性 95112-940805.doc 1244860 縮小之虛擬投射框之全部四個角位於在前述座標系統上 指定之前述投射圖像之範圍内時之縮小比，在前述空間 光调制機構上設定最大尺寸之虛擬投射框。 6.如請求項4之圖像投射方法，其中藉由以前述被投射體之 中心為中心，使用二維之投影轉換，將前述被投射體之 四個角之位置關係轉換成具有與前述投射圖像相同縱橫 尺寸比之矩形四個角之位置關係，在前述空間光調制機 構上設定虛擬投射框。 7 · 一種技景> 機，其具備·空間光調制機構，其係依據顯示 投射至矩形狀被投射體之矩形狀投射圖像之資訊生成調 制光；及投射透鏡，其係將該空間光調制機構生成之調 制光投射至前述矩形狀之被投射體；並依據顯示將前述 矩形狀之投射圖像變形後之圖像之資訊，使前述空間光 調制機構生成調制光，而在前述矩形狀之被投射體上投 射成矩形之圖像，其特徵為： 具備虛擬投射框設定機構，其係在前述空間光調制機 構上設定具有與前述矩形狀之投射圖像相同之縱橫尺寸 比，於投射至前述矩形狀之被投射體時，在小於前述矩 形狀被投射體之尺寸’並使中心與前述矩形狀被投射體 之中心一致狀態下，成為矩形狀之虛擬投射框。 8· —種投影機，其具備··空間光調制機構，其係依據顯示 投射至矩形狀被投射體之矩形狀投射圖像之資訊生成調 制光；及投射透鏡，其係將該空間光調制機構生成之調 制光投射至前述矩形狀之被投射體；並依據顯示將前述 95112-940805.doc 1244860 矩形狀之投射圖像變形後之圖像之資訊，使前述空間光 調制機構生成調制光，而在前述矩形狀之被投射體上投 射成矩形之圖像，其特徵為具備： 虛擬投射框設定機構，其係在前述空間光調制機構上 設定具有與前述矩形狀之投射圖像相同之縱橫尺寸比， 於投射至前述矩形狀之被投射體時，在小於前述矩形狀 被投射體之尺寸，並使中心與前述矩形狀被投射體之中 心一致狀態下，成為矩形狀之虛擬投射框；及 運算機構，其係運算前述空間光調制機構上之前述矩 形狀投射圖像之變形量，而使該虛擬投射框設定機構係 前述矩形投射圖像之四個角與設定於前述空間光調制機 構上之虛擬投射框之四個角一致。 9·如請求項7或8之投影機，其中具備： 拍攝機構，其係拍攝圖像，該圖像包含：將依據顯示 未變形之前述投射圖像之資訊，使前述空間光調制機構 生成之調制光通過前述投射透鏡，而以最大尺寸投射至 前述被投射體時之前述投射圖像之四個角位置；及前述 被投射體之四個角位置；及 指定機構，其係自該拍攝機構拍攝之圖像，在設定於 月述拍攝機構之座標系統上指定前述被投射體之四個角 位置及前述投射圖像之四個角位置； 月’J述虛擬投射框設定機構於前述指定機構在前述座標 系統上指定之前述被投射體之四個角位置内之至少一個 存在於前述指定機構在前述座標系統上指定之前述投射 95112-940805.doc 1244860 圖像之四個角位置之外側時，在前述空間光調制機構上 没疋虛擬投射框。 10.如請求項9之投影機，其中前述虛擬投射框設定機構係依 據前述指定機構在前述座標系統上指定之前述被投射體 四個角之位置及前述投射圖像四個角之位置，在前述空 間光調制機構上設定最大尺寸之虛擬投射框。 11 ·如請求項10之投影機，其中前述虛擬投射框設定機構係 藉由階段性縮小將前述指定機構在前述座標系統上指定 之前述被投射體之縱橫尺寸比轉換成前述投射圖像之縱 橫尺寸比之虛擬投射框，依據階段性縮小之虛擬投射框 之全部四個角位於前述指定機構在前述座標系統上指定 之前述投射圖像之範圍内時之縮小比，在前述空間光調 制機構上設定最大尺寸之虛擬投射框。 12·如請求項1〇之投影機，其中前述虛擬投射框設定機構係 藉由以剞述被投射體之中心為中心，使用二維之投影轉 換，將前述被投射體之四個角之位置關係轉換成具有前 述投射圖像之縱橫尺寸比之矩形四個角之位置關係，在 前述空間光調制機構上設定虛擬投射框。 13· —種投影機，其具備··空間光調制機構，其係依據顯示 投射至矩形狀被投射體之矩形狀投射圖像之資訊而生成 調制光；投射透鏡，其係將該空間光調制機構生成之調 制光投射至前述矩形狀之被投射體；及拍攝裝置；並依 據前述拍攝裝置拍攝之圖像，設定依據顯示將前述矩形 狀投射圖像變形後之圖像之資訊，使前述空間光調制機 95112-940805.doc 1244860 構生成調制光’而在前述被投射體上投射成矩形狀圖像 用之具有與前述矩形狀投射圖像相同縱橫尺寸比，且比 前述被投射體尺寸小，並使中心與前述被投射體之中心 一致之矩形狀虛擬投射框，其特徵為具備以下機構： 使前述空間光調制機構生成顯示測試圖案之調制光， 該測試圖案顯示前述矩形狀投射圖像之四個角，並自前 述投射透鏡向前述矩形狀之被投射體投射； 使前述拍攝裝置拍攝前述測試圖案向前述矩形狀被投 射體投射之狀態； 在前述拍攝裝置拍攝之圖像上檢測前述矩形狀被投射 體之四個角位置； 在前述拍攝裝置拍攝之圖像上檢測前述投射之測試圖 案之四個角位置； 檢查前述拍攝裝置拍攝之圖像上之前述矩形狀被投射 體之四個角與測試圖案四個角之相對位置關係；及 在前述拍攝裝置拍攝之圖像上，前述矩形狀被投射體 四個角内之至少一個未位於被前述投射之測試圖案之四 個角包圍之範圍内時，決定虛擬投射框之四個角。 14. 一種電腦可讀取之記錄媒體，其記錄有一程式，其特徵 為：使具備下述機構之電腦執行下述步驟； 該電腦係具備下述機構： 空間光調制機構，其係依據顯示投射至矩形狀被投射 體之矩t狀&射圖像之資訊而生成調制^;投射透鏡， 其係將該空間光調制機構生成之調制光投射至前述矩形 95112-940805.doc 1244860 狀之被投射體，及拍攝裝置；並依據顯示將前述矩形狀 投射圖像變形後之圖像之資訊，使前述空間光調制機構 生成調制光’而在前述被投射體上投射成矩形狀之圖像 者，依據前述拍攝裝置拍攝之圖像，設定具有與前述矩 形狀投射圖像相同縱橫尺寸比，且比前述矩形狀被投射 體之尺寸小’並使中心與前述矩形狀被投射體之中心一 致之矩形狀之虛擬投射框； 該程式使前述電腦執行以下步驟： 使前述空間光調制機構生成顯示測試圖案之調制光， 該測試圖案顯示前述矩形狀投射圖像之四個角，並自前 述投射透鏡向前述矩形狀之被投射體投射； 使前述拍攝裝置拍攝前述測試圖案向前述矩形狀被投 射體投射之狀態； 在前述拍攝裝置拍攝之圖像上檢測前述矩形狀被投射 體之四個角位置； 在前述拍攝裝置拍攝之圖像上檢測前述投射之測試圖 案之四個角位置； 檢查前述拍攝裝置拍攝之圖像上之前述矩形狀被投射 體之四個角與測試圖案之四個角之相對位置關係；及 在前述拍攝裝置拍攝之圖像上，於前述矩形狀被投射 體之四個角内之至少一個未位於被前述投射之測試圖案 之四個角包圍之範圍内時，決定虛擬投射框之四個角。 95112-940805.doc1244860 10. Scope of patent application: 1. An image projection method, based on displaying information of a rectangular projection image projected onto a rectangular projected object, to cause the spatial light modulation mechanism to generate modulated light to cause the projection lens to project the aforementioned spatial light. When the modulated light generated by the modulation mechanism reaches the rectangular projected object, the spatial light modulation mechanism generates modulated light according to the information on the image obtained by deforming the rectangular projected image, and the modulated light A rectangular image projected upward is characterized in that the spatial light modulation mechanism is set to have the same aspect ratio as that of the rectangular projected image, and when projected onto the rectangular projected object, the ratio is smaller than When the size of the rectangular projected object is the same as the center of the rectangular projected object, it becomes a rectangular virtual projection frame. 2. An image projection method, based on the display of the information of the rectangular projection image projected onto the rectangular projected object, to cause the spatial light modulation mechanism to generate modulated light, and to cause the projection lens to project the modulated light generated by the spatial light modulation mechanism to When the rectangular projected object is displayed, the spatial light modulation mechanism generates modulated light based on the information of the transformed image of the rectangular projected image, and projects a rectangular image on the projected object. It is characterized in that: the spatial light modulation mechanism is set to have the same aspect ratio as that of the rectangular projected image, and when projected onto the rectangular projected object, the size is smaller than the rectangular projected object, In the state where the center is consistent with the center of the rectangular projected object, it becomes a rectangular virtual projection frame 95112-940805.doc 1244860; it is different from the rectangular shape of the rectangular projection image on the spatial light modulation mechanism. The four corners of the rectangular projection image are made to coincide with the four corners of the virtual projection frame set on the aforementioned spatial light modulation mechanism. 3. The image projection method according to claim 1 or 2, wherein the image is captured by the shooting mechanism, and the image includes: causing the described spatial light modulation mechanism to generate modulated light according to a resource that displays the aforementioned projected image without distortion. , The four angular positions of the projected image when the modulated light generated by the aforementioned spatial light withdrawing mechanism is projected to the projected object with the largest size through the aforementioned projection lens, and the four corners of the projected object are described Position; for the image captured by the shooting mechanism, specify the four angular positions of the projected object and the four angular positions of the projected image on the coordinate system set on the aforementioned shooting mechanism; When at least one of the four angular positions of the projected object exists outside the four angular positions of the projected image specified on the coordinate system, the virtual projection frame is set on the spatial light modulation mechanism. 4. The image projection method according to claim 3, wherein the maximum value is set on the spatial light modulation mechanism according to the positions of the four corners of the projected object and the positions of the four corners of the projected image specified on the coordinate system. The size of the virtual projection frame. 1 5. The image projection method according to claim 4, wherein the aspect ratio of the projected object specified on the aforementioned coordinate system is converted into a virtual projection frame describing the aspect ratio of the projected image by stepwise reduction. According to the reduction ratios when all four corners of the reduced virtual projection frame are within the range of the aforementioned projected image specified on the aforementioned coordinate system according to the stage 95112-940805.doc 1244860, the maximum value is set on the aforementioned spatial light modulation mechanism. The size of the virtual projection frame. 6. The image projection method according to claim 4, wherein the positional relationship of the four corners of the projected object is converted into the image projected by the projection using the two-dimensional projection transformation with the center of the projected object as the center. For the positional relationship of the four corners of a rectangle with the same aspect ratio of an image, a virtual projection frame is set on the aforementioned spatial light modulation mechanism. 7. A technical scene machine having a spatial light modulation mechanism that generates modulated light based on information showing a rectangular projection image projected onto a rectangular projected object; and a projection lens that converts the spatial light The modulated light generated by the modulation mechanism is projected onto the aforementioned rectangular projected object; and according to the displayed information of the transformed image of the rectangular projected image, the spatial light modulation mechanism generates the modulated light, and the modulated light is generated in the rectangular shape. A rectangular image projected on the subject is characterized by: a virtual projection frame setting mechanism is set on the aforementioned spatial light modulation mechanism to have the same aspect ratio as the rectangular projected image, and When the rectangular projected object is reached, it becomes a rectangular virtual projection frame in a state that the size is smaller than the rectangular projected object 'and the center is consistent with the center of the rectangular projected object. 8. A projector comprising: a spatial light modulation mechanism that generates modulated light based on information showing a rectangular projection image projected onto a rectangular projected object; and a projection lens that modulates the spatial light The modulated light generated by the mechanism is projected onto the aforementioned rectangular projected object; and based on the displayed information of the transformed image of the aforementioned 9512-940805.doc 1244860 rectangular projected image, the aforementioned spatial light modulation mechanism generates modulated light, The rectangular image projected on the rectangular projected object is characterized by: a virtual projection frame setting mechanism for setting the same aspect ratio as the rectangular projection image on the spatial light modulation mechanism; The size ratio is a rectangular virtual projection frame in a state where the size is smaller than the size of the rectangular projected object and the center is consistent with the center of the rectangular projected object when projected onto the rectangular projected object; And a calculation mechanism for calculating the deformation amount of the rectangular projection image on the spatial light modulation mechanism, so that the virtual projection frame is set Setting means based the four corners of the rectangular projection image consistent virtual block of the four corners of the projection of the spatial light modulation mechanism. 9. The projector as claimed in claim 7 or 8, comprising: a photographing mechanism for capturing an image, the image comprising: causing the aforementioned spatial light modulation mechanism to generate the The modulated light passes through the aforementioned projection lens and is projected at the maximum size to the four angular positions of the projected image when projected onto the projected object; and the four angular positions of the projected object; and the designated mechanism, which is derived from the photographing mechanism For the captured image, the four angular positions of the aforementioned projected object and the four angular positions of the aforementioned projected image are designated on the coordinate system set on the monthly photographing mechanism; When at least one of the four angular positions of the projected object designated on the aforementioned coordinate system exists outside the four angular positions of the aforementioned projected 95112-940805.doc 1244860 image designated by the aforementioned designation mechanism on the aforementioned coordinate system There is no virtual projection frame on the aforementioned spatial light modulation mechanism. 10. The projector according to claim 9, wherein the virtual projection frame setting mechanism is based on the positions of the four corners of the projected object and the positions of the four corners of the projected image specified by the designation mechanism on the coordinate system. A virtual projection frame with a maximum size is set on the aforementioned spatial light modulation mechanism. 11 · The projector according to claim 10, wherein the virtual projection frame setting mechanism converts the aspect ratio of the projected object specified by the specifying mechanism on the coordinate system into the aspect ratio of the projected image by stepwise reduction. The size reduction ratio of the virtual projection frame, according to the reduction ratio of all four corners of the virtual projection frame that is gradually reduced is within the range of the aforementioned projection image designated by the aforementioned designation system on the aforementioned coordinate system, on the aforementioned spatial light modulation mechanism Sets the maximum size of the virtual projection frame. 12. The projector as claimed in claim 10, wherein the aforementioned virtual projection frame setting mechanism uses the two-dimensional projection transformation with the center of the projected object as the center to position the four corners of the projected object. The relationship is converted into a positional relationship of the four corners of the rectangle having the aspect ratio of the aforementioned projected image, and a virtual projection frame is set on the aforementioned spatial light modulation mechanism. 13 · —A projector having a spatial light modulation mechanism that generates modulated light based on information showing a rectangular projection image projected onto a rectangular projected object; a projection lens that modulates the spatial light The modulated light generated by the mechanism is projected onto the aforementioned rectangular projected object; and a photographing device; and based on the image photographed by the aforementioned photographing device, information on an image obtained by deforming the rectangular projected image according to the display is set to make the aforementioned space Light modulator 95112-940805.doc 1244860 Generates modulated light to project a rectangular image on the projected object, which has the same aspect ratio as the rectangular projected image and is smaller than the projected object size The rectangular virtual projection frame with the center consistent with the center of the projected object is characterized by having the following mechanism: the aforementioned spatial light modulation mechanism generates modulated light displaying a test pattern, and the test pattern displays the aforementioned rectangular projection image The four corners, and project from the projection lens to the rectangular projected object; Test the state where the pattern is projected onto the rectangular projected object; Detect the four corner positions of the rectangular projected object on the image captured by the photographing device; Detect the projected test pattern on the image photographed by the photographing device The four corner positions; check the relative positional relationship between the four corners of the rectangular projected object and the four corners of the test pattern on the image captured by the aforementioned shooting device; and When at least one of the four corners of the projected object is not within the range surrounded by the four corners of the projected test pattern, the four corners of the virtual projection frame are determined. 14. A computer-readable recording medium having a program recorded therein, which is characterized in that a computer having the following mechanisms performs the following steps; the computer is provided with the following mechanisms: a spatial light modulation mechanism, which is based on a display projection Modulation generated by the moment t-shaped & image of the rectangular projected object, a projection lens, which projects the modulated light generated by the spatial light modulation mechanism onto the aforementioned rectangular 95112-940805.doc 1244860 quilt A projection body, and a photographing device; and according to the information of displaying the transformed image of the rectangular projection image, causing the spatial light modulation mechanism to generate modulated light, and projecting a rectangular image on the projected object According to the image taken by the aforementioned photographing device, set the aspect ratio and aspect ratio that are the same as those of the rectangular projected image and smaller than the size of the rectangular projected object, and make the center coincide with the center of the rectangular projected object. A rectangular virtual projection frame; the program causes the aforementioned computer to perform the following steps: causing the aforementioned spatial light modulation mechanism to generate a modulated light displaying a test pattern The test pattern displays the four corners of the rectangular projection image and is projected from the projection lens to the rectangular projected object; causing the photographing device to photograph the state where the test pattern is projected on the rectangular projected object; Detecting four corner positions of the rectangular projected object on the image captured by the photographing device; Detecting four corner positions of the projected test pattern on the image photographed by the photographing device; Checking the picture photographed by the photographing device The relative positional relationship between the four corners of the rectangular projective object and the four corners of the test pattern on the image; and at least four of the four corners of the rectangular projective object on the image captured by the photographing device; When one is not within the range surrounded by the four corners of the projected test pattern, the four corners of the virtual projection frame are determined. 95112-940805.doc
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