A7 A7A7 A7
【本發明之背景】 、接，、現有傳統相機或數位相機之影像擴取設備的自動 動隹式大致刀為王動式與被動式二種’其中，主動式自 μ万式多為傻瓜相機所採用，其係延襲傳統相機，再 獨"^的自動對焦裝置，例如由紅外線發射端盘一红 ^接"㈣成之測距儀，俾利用制被攝體狀射回 來的光亮度，而推算出相機與被攝體之距離；而被動式自 1焦則係廣為中低階數位相機所採用，其利用數位相機 —身所具備的影像感測器來分析被攝體的焦距評估値等， 精以判斷相機與被攝體之距離。 二然而，採用主動式自動對焦的影像擷取設備需外加一 =乂的自動對焦裝置，其自動對焦之清晰度則因該測距儀 複雜私度而差異極大，且外加此測距儀將導致成本之拎 加與量產之不便；而採用被動式自動對焦的影像掏取設^ 只需利用本身所具備的影像感測器’即可直接在相機内部 進仃焦距評估㈣運算，大大減輕了成本與量產的問題. 但由於得依賴所判斯的焦距評估値，故當被攝體處於暗能 或被攝體過於單純的狀況τ，其表現便非常不理想，社二 照第】圖，其顯示在暗態與亮態時，焦距評估値對鏡頭月調 焦位置的變化，㈣中之曲線可知，在暗態（即光線不 -------h—*——MW---- (請先閱讀背面之注意事項再填寫本頁) ^---^---------_____ II ϋ n n flf ___ 丨丨[Background of the present invention] The automatic moving type of the conventional image capturing equipment of the conventional camera or digital camera is roughly the two types of the active type and the passive type. Among them, the active self-mode is mostly used by fool cameras. Adopted, it is a kind of autofocusing device that inherits the traditional camera and then "^", such as the infrared transmitter end plate is a red "connected" rangefinder, which uses the brightness of the object to shoot back. , And the distance between the camera and the subject is calculated; and the passive self-focus is widely used in low-to-medium-order digital cameras, which use the image sensor of the digital camera-body to analyze the focus evaluation of the subject Wait a minute to determine the distance between the camera and the subject. Second, image capture equipment that uses active autofocus requires an additional autofocus device. The sharpness of its autofocus varies greatly due to the complexity and privacy of the rangefinder, and the addition of this rangefinder will result in Increased cost and inconvenience of mass production; and the use of passive autofocus for image extraction settings ^ Only use the image sensor's own camera to perform focal length evaluation and calculation directly inside the camera, which greatly reduces costs The problem with mass production. However, because it depends on the focal length evaluation of the judgement, 表现, when the subject is in dark energy or the subject is too simple τ, its performance is very unsatisfactory. It shows that in the dark state and the bright state, the focal length assessment 値 changes in the monthly focus position of the lens. The curve in ㈣ shows that in the dark state (that is, the light is not ------- h-* ---- MW-- -(Please read the notes on the back before filling this page) ^ --- ^ ---------_____ II ϋ nn flf ___ 丨 丨
本紙張尺度適用^^^(cns)m規格⑽χ撕公爱） 五、發明說明（>) 即光線適當時)相比較下，在亮態下具有明 很容易找到正確的對焦位置，而在暗態下 义口…、點’故不易獲得最佳對焦位置。有鏗於 ’心習知影像擷取設備之自動對焦方式仍有諸多缺 天，而有待予以進一步改善。 、”發明人爰因於此’本於積極發明之精神，亟思一種可 1解決上相題之「利用防紅眼作為影像擴取設備之自動 广、、、補償裝置及其㈣」，幾經研时驗終至完成此項嘉 惠世人之發明。 【本發明之概述】 本發明之目的係在提供-種利用防紅眼作為影像擴取 設備之自動對焦補償裝置和方法，係以低成本的被動式自 動對焦方式為主體，利關紐發光前都會動作的防紅眼 裝置作為錢以獲得正補焦結果，錢純動式自動對 焦在暗態的缺點。 依據本發明之一特色，所提出之自動對焦補償裝置主 要包括：一影像感測器，係供擷取被攝體之影像；一焦距 調整器，係供調整該影像擷取設備之焦距；一防紅眼裝 置，可發光以提供防紅眼作用；一自動對焦模組，係依據 該影像感測器所擷取之被攝體的焦距評估値，來初步判斷 該被攝體與該影像擷取設備之距離，以驅動該焦距調整器 而粗略調整該影像擴取設備之焦距，且在該防紅眼裝i發 光以提供防紅眼作用時，再依據該影像感測器所掏取之被 A7 B7 五、發明說明（彡） ，體的焦距評估値，㈣—步_該被攝體與該影像類取 裝置<距離，以驅動該焦距調整器而微調該影像掏取裝置 爻焦距。 、依據本發明〈另-特色，所提出之自動對焦補償方法 要c括下述之步驟.（A )以影像感測器揭取被攝體之 注 影像，並依據所掏取之被攝體的焦距評估<直，以一自動對 焦模組來初步判斷該被攝體與該影像掏取設備之距離，俾 驅動一焦距調整器而粗略調整該影像擷取設備之声、距； ⑷驅動：防紅眼裝置發光至少一次以提供防紅眼作 用’（C )於|次孩p方紅眼裝置發光以提供防紅眼作用 時，以該影像感測器掏取被攝體之影像，並依據所撫取之 被攝體的焦距評估値，來進一步判斷該被攝體與該影㈣ 取設備之距離，以驅動該焦距調整器而微調該影像擴取設 備之焦距。 由於本發明構造新穎，能提供產業上利用，且確有增 進功效，故依法申請發明專利。 為使貴審查委員能進一步瞭解本發明之結構、特徵 經濟部智慧財產局員工消費合作社印製 及其目的，茲附以圖示及較佳具體實施例之詳細説明如 后： 【圖式簡單説明】 弟1圖·係顯示以習知影像擴取設備取像時之被攝體於暗 悲與π悲之焦距評估値對鏡頭調焦位置之變化。 I-------— 6 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公爱） A7 A7 (2 1 )鏡頭 (2 2 )影像感測器 (231)閃光燈管 (24 )自動對焦模組 (2 6 )被攝體 五、發明說明（今， 第2圖：係本發明之刹 f+# 防紅眼作為影像擷取設備之自動 片 對焦補償裝置的功能方塊圖。 第3圖：係為使用本發 自動對焦補償方法來進行擷取 影像的流程圖。 第4圖··=為本發明之自動對焦補償方法在閃光燈模組發 ^ I、Ά供防紅眼時之微調焦距的詳細流程。 第圖係'本《曰月之利用防紅眼作為影像類取設備之自動 對焦補償裝置於補光前後之焦距評純的變化。 【圖號説明] (2 0 )防紅眼裝置 (23 3 )比較器 (2 3 )閃光燈模組 (2 3 2 )光偵測器 (2 5 )焦距調整器 【較佳具體貫施例之詳細説明】 有關本發明之利用防紅眼作為影像擷取設備之自動對 焦補償裝置及其方法之一較佳實施例，請先參照第2圖所示該 裝置之功能方塊圖，其主要係由鏡頭21、影像感測器22、防紅 眼裝置2 0、自動對焦模組24、以及焦距調整器2 5等構件 所構成，其中，該防紅眼裝置20可為影像擷取裝置之閃光 燈模組，或為發光二極體（LED )模組等可發光之裝置， 於本較佳實施例，該防紅眼裝置2 〇為一閃光燈模組2 3， 本紙張尺度適用中國國家標準（CNS)A4規格（210 x 297公釐） #訂 i (請先閱讀背面之注意事項再填寫本頁) 線-冷. 經濟部智慧財產局員工消費合作社印製 486603 員 製 A7 B7 五、發明說明（孓） 其更包括閃光燈管23 1、光偵測器232、以及比較器23 3 等主要構件。 前述之鏡頭2 1係為影像擴取設備之輸入視窗，該影像 感測器2 2係透過鏡頭2 1為該影像擷取設備擷取被攝體2 6 之影像資訊，並將所擷取之影像資訊傳送至該自動對焦模 組2 4 ’以分析其焦距評估値來進行對焦調整，該閃光燈模 組23係為該影像擷取設備提供曝光輔助光源與防紅眼光 源，其中，當該閃光燈管23 1發出閃光以提供防紅眼光源 時’違光偵測器2 3 2並偵測該被攝體2 6之光度，並將所測 得之光度轉換為一電壓訊號v，以傳送至該比較器233， 而由該比較器23 3依此電壓訊號v之準位，來與預設之一 上限電壓vH與一下限電壓Vl比較，若電壓v大於Vh即代 表光度太亮，電壓V小於VL代表光度太暗，電壓V介於Vh 及V L之間則代表光度適中，該自動對焦模組2 4即依此比 較結果及由該影像感測器22所擴取之影像資訊，來判斷該 被攝眼26與孩影像擴取設備之距離，以驅動該焦距調整器 25來調整鏡頭21之位置，而達成自動對焦之作用。 第3圖顯示使用本發明之自動對焦補償方法來進行梅 取影像的流程圖，首先，合與儋炎 判斷…命 設備之自動曝光機制 断卜|冗度足夠時，無須使用閃光燈而 :調整(步驟S3〇"及自動焦距調整(步驟S30 = 曝::；(步_)，隨後進 m序，於步驟305中，進行自動焦距調 0-------^---------^ — —0— (請先閱讀背面之注意事項再填寫本頁) 486603 經濟部智慧財產局員工消費合作社印製 A7 B7 五、發明說明（A ) 整，以依據由影像感測器22所擷取被攝體26之焦距評估 値來初步判斷該被攝體2 6與該影像擷取設備之距離，俾驅 動該焦距調整器2 5而粗略調整該影像擷取設備之焦距（步 騾S306 )，然後，於該閃光燈模組23每次發光以提供防 紅眼作用時（步騾S3 07 )，則該影像感測器22再次擷取 被攝體2 6之影像，而由該自動對焦模組2 4再依據所擴取 之被攝體2 6的焦距評估値來進一步判斷該被攝體2 6與該 影像擷取設備之距離，以驅動該焦距調整器25而微調該影 像擷取設備之焦距（步騾S3 08 )。經執行前述步驟83〇7 及S 3 0 8至少一次之後，便可將影像擷取設備之焦距調整 至正確之位置，隨後，閃光燈正式發光（步驟S3 〇9 )而 進行拍攝（步驟S3 10 )。 第4圖進一步顯示當閃光燈模組23發光以提供防紅眼 時之微調焦距的詳細流程，其中，當閃光燈管2 3丨發光時 (步驟S401 )，該光偵測器232判斷亮度是否足夠（步驟 S 4 0 2 )，亦即，遠光偵測益2 3 2將由光度所轉換之電壓訊 號V與預設之上限電壓vH及下限電壓比較，當電壓V大 於Vh時，表示光度太亮而將焦距設在一預設之近距離點 (例如小於1公尺處）（步驟s 4 0 5 );若電壓V小於V L， 則表示光度太暗而將焦距設在一預設之遠距離點（例如大 於3公尺處）（步驟S406 );若電壓v介於^與^之間 則代表光度適中，而由該自動對焦模組24進行焦距評估値 運算（步驟S403 )，並驅動焦距調整器25進行焦距微調 (步驟 S 4 0 4 ) 〇 (請先閱讀背面之注意事項再填寫本頁) #·1 訂---------線丨· 9 A7 A7 經濟部智慧財產局員工消費合作社印製 五、發明說明（夕 服她、本發月之自動對焦補償裝置及方法可以現有之防紅 马制作為光源而獲得正確的對焦結I，第5圖即顯示— 。象技、取〃又備；^知用本發明之防紅眼機制來補光前後之焦 、平估値的又化’其中，A曲線係表示防紅眼機制發光前 "、、距#估値’ B曲線係為防紅眼機制發光後之焦距評估 =由凋焦位置M至N為粗調時之焦距範圍，調焦位置p 為微調後之焦距範圍，由圖可知經以防紅眼作為自動 、:":、補饧後’可輕易地找出合焦點而達成自動對焦之目 的。 由以上< 5兄明可知，本發明以低成本之被動式自動對 二、方弋為主，藉由閃光燈發光前都會動作的防紅眼機制 作為光源來獲得正確的對焦結果，故可免於被動式自動對 焦在暗態之缺失，而且當閃光燈會需要發光時，即表示被 攝體党度不足而可能會影響自動對焦準確性，故此時以防 紅眼光源來進行對焦補償，可不必等待軔體對於焦距評估 1_勺判斷便可以補光後的影像進行焦距評估値的運算虚 判斷，得到理想的對焦結果，又當所得影像太亮或太“ 無法補光時，亦可以依此來判斷被攝體的距離，而不再以 補光後的影像進行焦距評估値的運算與判斷。 综上所陳，本發明無論就目的、手段及功效，在在均 顧示其迥異於習知技術之特徵，為影像擴取設備之自動對 焦設計上的—大突破，懇請貴審查委員明察，早日賜准 專利，俾嘉惠社會，實感德便。惟應注意的是，上述諸多 貫施例僅係為了便於諸明而與/ 、况明而舉例而已，本發明所主張之權 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公爱— --------^---------線！ (請先閱讀背面之注意事項再填寫本頁) 486603 A7 _B7_ 五、發明說明（2 ) 利範圍自應以申請專利範圍所述為準，而非僅限於上述實 施例。 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐）This paper scale applies to ^^^ (cns) m specifications ⑽χTear public love) 5. Description of the invention (>) When the light is appropriate) In comparison, in the bright state, it is easy to find the correct focus position, and in the In the dark, the right mouth ..., click ', so it is not easy to get the best focus position. There are still many shortcomings in the auto-focus method of image acquisition equipment, and it needs to be further improved. Because of this, “the inventor is based on the spirit of active invention, and urgently thinks of a solution that can solve the above-mentioned problem,“ the use of red-eye reduction as an automatic widening device for image expansion and acquisition, and its compensation ” At the end of the test, the invention that benefited the world was completed. [Summary of the invention] The purpose of the invention is to provide an autofocus compensation device and method using red-eye reduction as an image expansion device, which is based on a low-cost passive autofocus method, and will operate before the light shines. The red-eye reduction device used as money to get a positive fill-focus result, the disadvantage of Qian pure motion autofocus in the dark state. According to a feature of the present invention, the proposed autofocus compensation device mainly includes: an image sensor for capturing an image of a subject; a focus adjuster for adjusting a focal length of the image capturing device; A red-eye reduction device that emits light to provide a red-eye reduction effect; an autofocus module based on the focal length evaluation of a subject captured by the image sensor to make a preliminary judgment of the subject and the image capture device Distance to drive the focus adjuster to roughly adjust the focal length of the image expansion device, and when the red-eye reduction device i emits light to provide a red-eye reduction effect, it is then A7 B7 according to the image sensor 2. Description of the invention (i), the evaluation of the focal length of the object, i—step__ The distance between the subject and the image acquisition device < to drive the focus adjuster to fine-tune the image extraction device ' s focal length. According to the present invention's "Additional-Features, the proposed auto-focus compensation method shall include the following steps. (A) Use the image sensor to extract the note image of the subject, and according to the extracted subject The focal length evaluation < straight, uses an autofocus module to determine the distance between the subject and the image extraction device, and drives a focus adjuster to roughly adjust the sound and distance of the image acquisition device; ⑷Drive : The red-eye reduction device emits light at least once to provide the red-eye reduction effect. (C) When the red-eye reduction device emits light to provide the red-eye reduction effect, the image sensor is used to extract the image of the subject, and according to the care Use the focal length evaluation of the subject to further determine the distance between the subject and the video capture device to drive the focus adjuster to fine-tune the focal length of the image expansion device. Since the present invention has a novel structure, can provide industrial use, and does have an increasing effect, it applies for an invention patent in accordance with the law. In order to enable your review committee to better understand the structure and characteristics of the present invention, the printing by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs and its purpose, the attached drawings and detailed description of the preferred embodiments are as follows: [Schematic description Figure 1 shows the evaluation of the focal length of the subject in dark sadness and π sadness when taking a picture with a conventional image expansion device, and the change of the focus position of the lens. I -------— 6 This paper size applies to China National Standard (CNS) A4 (210 X 297 public love) A7 A7 (2 1) Lens (2 2) Image sensor (231) Flash tube ( 24) Autofocus module (2 6) Subject 5. Description of the invention (now, Figure 2: is the functional block diagram of the present invention's brake f + # red-eye reduction as an automatic film focus compensation device of an image capture device. Figure 3: This is a flowchart of capturing an image using the autofocus compensation method of this hair. Figure 4 ·· = This is the fine adjustment of the autofocus compensation method of the present invention when the flash module sends ^ I, Ά for red-eye reduction The detailed process of the focal length. The picture shows the change in the focal length of the autofocus compensation device that uses red-eye reduction as an image acquisition device before and after fill light. [Illustration of the drawing number] (2 0) Red-eye reduction device (23 3) Comparator (2 3) Flash module (2 3 2) Light detector (2 5) Focal length adjuster [Detailed description of the preferred embodiment] The invention uses red-eye reduction as image capture For a preferred embodiment of the autofocus compensation device and method of the device, please refer to FIG. 2 first. The functional block diagram of the device is mainly composed of components such as the lens 21, the image sensor 22, the red-eye reduction device 20, the autofocus module 24, and the focus adjuster 25. Among them, the red-eye reduction device 20 may be a flash module of an image capturing device, or a light-emitting device such as a light emitting diode (LED) module. In the preferred embodiment, the red-eye reduction device 20 is a flash module 23. This paper size applies to China National Standard (CNS) A4 specifications (210 x 297 mm) #Order i (Please read the precautions on the back before filling this page) Wire-cold. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperatives 486603 Member system A7 B7 V. Description of the invention (孓) It also includes the main components such as the flash tube 23 1, the light detector 232, and the comparator 23 3. The aforementioned lens 2 1 is the input window of the image expansion device. The image sensor 2 2 captures the image information of the subject 2 6 through the lens 2 1 for the image capture device, and transmits the captured image information to the autofocus module 2 4 'to analyze its focal length. Evaluate 値 for focus adjustment. The flash The light module 23 provides an exposure auxiliary light source and a red-eye reduction light source for the image capture device. When the flash tube 23 1 emits a flash to provide a red-eye reduction light source, the light detector 2 3 2 detects the light source. The photometric value of the subject 26 is converted into a voltage signal v to be transmitted to the comparator 233, and the comparator 23 3 is used to preset the voltage signal v according to the level of the voltage signal v. An upper limit voltage vH is compared with a lower limit voltage Vl. If the voltage v is greater than Vh, it means that the light is too bright, the voltage V is less than VL, which means that the light is too dark, and the voltage V between Vh and VL means that the light is moderate. The autofocus module 2 4 That is, based on the comparison result and the image information acquired by the image sensor 22, determine the distance between the photographed eye 26 and the child image acquisition device to drive the focus adjuster 25 to adjust the position of the lens 21. , And achieve the role of autofocus. Figure 3 shows the flow chart of using the auto-focus compensation method of the present invention to acquire images. First, determine the combined exposure of the inflammation ... The automatic exposure mechanism of the life equipment is judged. When the redundancy is sufficient, you do not need to use the flash and adjust: Step S3 " and automatic focus adjustment (step S30 = exposure ::; (step _), then proceed to m sequence, in step 305, perform automatic focus adjustment 0 ------- ^ ----- ---- ^ — —0— (Please read the notes on the back before filling out this page) 486603 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of Invention (A), based on image sensing The focal length evaluation of the captured object 26 captured by the camera 22 is used to make a preliminary judgment on the distance between the subject 26 and the image capture device, and to drive the focus adjuster 25 to roughly adjust the focus of the image capture device ( Step S306), and then each time the flash module 23 emits light to provide a red-eye reduction effect (Step S3 07), the image sensor 22 captures an image of the subject 26 again, and the image The autofocus module 2 4 further judges the focal length of the subject 2 6 according to the focal length evaluation 値. The distance between the subject 26 and the image capture device to drive the focus adjuster 25 to fine-tune the focus of the image capture device (step S3 08). After performing the foregoing steps 8307 and S 3 0 8 at least After one time, the focal length of the image capture device can be adjusted to the correct position, and then the flash light is formally illuminated (step S3 09) and shooting is performed (step S3 10). Figure 4 further shows when the flash module 23 emits light to Provide a detailed flow of fine focus adjustment during red-eye reduction, in which, when the flash tube 2 3 丨 emits light (step S401), the light detector 232 judges whether the brightness is sufficient (step S402), that is, the high-light detection Measure 2 compares the voltage signal V converted from photometric value with the preset upper limit voltage vH and lower limit voltage. When the voltage V is greater than Vh, it indicates that the photometric value is too bright and the focal length is set at a preset close distance point (for example, less than 1 meter) (step s 4 0 5); if the voltage V is less than VL, it means that the brightness is too dark and the focal length is set at a preset long distance point (for example, greater than 3 meters) (step S406); The voltage v between ^ and ^ means that the brightness is moderate, The autofocus module 24 performs the focus evaluation and calculation (step S403), and drives the focus adjuster 25 to fine-tune the focus (step S4 0 4) 〇 (Please read the precautions on the back before filling this page) # · 1 Order --------- line 丨 · 9 A7 A7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (Xi Fu her, this month ’s autofocus compensation device and method can be used to prevent redness. Ma made the correct focus knot I for the light source. Figure 5 shows-. It is known that the red-eye reduction mechanism of the present invention is used to fill the focus before and after the light, and the level is reduced. Among them, the A curve represents the red-eye reduction mechanism before the light is emitted. 'The B curve is the evaluation of the focal length after the red-eye reduction mechanism emits light = from the focal position M to N is the focal length range during coarse adjustment, and the focal position p is the focal length range after fine adjustment. It can be seen from the figure that red-eye reduction is used as an automatic, : ":, after supplementing, you can easily find the focus and achieve the purpose of autofocus. As can be seen from the above < 5 brothers, the present invention mainly adopts a low-cost passive automatic pairing of two and squares, and uses the red-eye reduction mechanism that will act before the flash fires as a light source to obtain correct focusing results, so it can be avoided from the passive type. The lack of autofocus in the dark state, and when the flash will need to light, it means that the subject is insufficient and may affect the accuracy of the autofocus. Therefore, at this time, focus compensation is performed with a red-eye prevention light source. Focal distance evaluation 1_ Judgment can be used to perform the focus evaluation of the image after the light is supplemented. The calculation of the virtual distance is achieved, and the ideal focus result is obtained. When the obtained image is too bright or too "cannot fill the light, you can also use this to determine the subject Distance, instead of the calculation and judgment of the focal length evaluation based on the image after fill light. In summary, the present invention, regardless of the purpose, means and effect, shows its characteristics that are quite different from the conventional technology. This is a major breakthrough in the design of the autofocus of image magnification equipment. I urge your reviewing committee to make a clear observation and grant a quasi-patent at an early date. Note that many of the above-mentioned embodiments are merely examples for the sake of convenience and clarity. The paper size claimed in the present invention is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297). -------- ^ --------- line! (Please read the notes on the back before filling this page) 486603 A7 _B7_ V. Description of the invention (2) The scope of benefits shall be applied for patent The scope is subject to change, not limited to the above examples. (Please read the precautions on the back before filling this page) The paper size printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs is printed in accordance with Chinese National Standard (CNS) A4 specifications 210 X 297 mm)