JP2005229293A5 - - Google Patents

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JP2005229293A5
JP2005229293A5 JP2004035293A JP2004035293A JP2005229293A5 JP 2005229293 A5 JP2005229293 A5 JP 2005229293A5 JP 2004035293 A JP2004035293 A JP 2004035293A JP 2004035293 A JP2004035293 A JP 2004035293A JP 2005229293 A5 JP2005229293 A5 JP 2005229293A5
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Prior art keywords
image
distance
distance data
angle detection
points
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JP2004035293A
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Japanese (ja)
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JP4442242B2 (en
JP2005229293A (en
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Publication of JP2005229293A5 publication Critical patent/JP2005229293A5/ja
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Claims (6)

入力される画像信号に応じた画像を投影する投影手段と、
この投影手段による画像投影面上の３点以上の測定点に対する距離をそれぞれ測定する測距手段と、
この測距手段によって得られた各測定点の距離データの中で近点側の少なくとも２点の距離データを角度検出用として抽出するデータ抽出手段と、
このデータ抽出手段によって抽出された各距離データに基づいて画像投影面の傾き角度を検出する角度検出手段と
を具備したことを特徴とする投影装置。 Projecting means for projecting an image according to an input image signal;
Distance measuring means for measuring the distance to each of three or more measurement points on the image projection surface by the projection means,
Data extraction means for extracting distance data of at least two points on the near point side from among distance data of each measurement point obtained by the distance measurement means;
An angle detecting means for detecting an inclination angle of the image projection plane based on each distance data extracted by the data extracting means. 前記データ抽出手段は、前記測距手段によって得られた各測定点の距離データの中で遠点側を除く少なくとも２点の距離データを角度検出用として抽出することを特徴とする請求項１記載の投影装置。   2. The data extracting unit extracts distance data of at least two points excluding the far point side from the distance data of each measurement point obtained by the distance measuring unit for angle detection. Projection device. 前記データ抽出手段は、前記投影手段による画像投影面の水平方向および垂直方向のうちの少なくとも一方の方向の測距結果に対し、近点側の少なくとも２点の距離データを角度検出用として抽出することを特徴とする請求項１記載の投影装置。   The data extraction means extracts distance data of at least two points on the near point side for angle detection with respect to a distance measurement result in at least one of a horizontal direction and a vertical direction of the image projection plane by the projection means. The projection apparatus according to claim 1. 前記角度検出手段によって検出された画像投影面の傾き角度に基づいて、前記投影手段によって投影される画像が適正なアスペクト比の矩形となるように台形補正を行う台形補正手段をさらに具備したことを特徴とする請求項１記載の投影装置。   And a trapezoidal correction unit that performs a keystone correction so that an image projected by the projection unit becomes a rectangle having an appropriate aspect ratio based on an inclination angle of the image projection plane detected by the angle detection unit. The projection apparatus according to claim 1, wherein: 画像を投影する投影装置に用いられる角度検出方法であって、
入力される画像信号に応じた画像を投影するステップと、
その画像投影面上の３点以上の測定点に対する距離をそれぞれ測定するステップと、
前記各測定点の距離データの中で近点側の少なくとも２点の距離データを角度検出用として抽出するステップと、
前記角度検出用として抽出された各距離データに基づいて画像投影面の傾き角度を検出するステップと
を備えたことを特徴とする角度検出方法。 An angle detection method used in a projection apparatus that projects an image,
Projecting an image according to the input image signal;
Measuring each distance to three or more measurement points on the image projection plane;
Extracting the distance data of at least two points on the near point side from among the distance data of each measurement point for angle detection;
Detecting the tilt angle of the image projection plane based on each distance data extracted for angle detection. 画像を投影する投影装置に搭載されたコンピュータによって実行される角度検出用のプログラムであって、
前記コンピュータに、
入力される画像信号に応じた画像を投影する機能と、
その画像投影面上の３点以上の測定点に対する距離をそれぞれ測定する機能と、
前記各測定点の距離データの中で近点側の少なくとも２点の距離データを角度検出用として抽出する機能と、
前記角度検出用として抽出された各距離データに基づいて画像投影面の傾き角度を検出する機能と
を実現させることを特徴とするプログラム。 An angle detection program executed by a computer mounted on a projection device that projects an image,
In the computer,
A function of projecting an image according to an input image signal;
A function of measuring distances to three or more measurement points on the image projection plane,
A function of extracting distance data of at least two points on the near point side among the distance data of the respective measurement points for angle detection;
And a function of detecting an inclination angle of the image projection plane based on each distance data extracted for angle detection.
JP2004035293A 2004-02-12 2004-02-12 Projection apparatus, angle detection method, and program Expired - Fee Related JP4442242B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004035293A JP4442242B2 (en) 2004-02-12 2004-02-12 Projection apparatus, angle detection method, and program

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004035293A JP4442242B2 (en) 2004-02-12 2004-02-12 Projection apparatus, angle detection method, and program

Publications (3)

Publication Number Publication Date
JP2005229293A JP2005229293A (en) 2005-08-25
JP2005229293A5 true JP2005229293A5 (en) 2007-02-08
JP4442242B2 JP4442242B2 (en) 2010-03-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004035293A Expired - Fee Related JP4442242B2 (en) 2004-02-12 2004-02-12 Projection apparatus, angle detection method, and program

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JP (1) JP4442242B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5257616B2 (en) 2009-06-11 2013-08-07 セイコーエプソン株式会社 Projector, program, information storage medium, and trapezoidal distortion correction method

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