TWI222317B - Method for compensating image chromatism - Google Patents

Abstract

A method for compensating image chromatism is provided. In virtue of each RGB channel has different wavelength and refractive index, an image dispersion will always occur when capturing an image from a lens. If the image dispersion is excessive, it will produce an image chromatism more easily. In order to solve that, we can use said method to improve the image dispersion of each RGB channel when capturing said image from the lens by a computer program. So we can further achieve the goal of image chromatism compensating.

Description

1222317 五、發明說明（l) "一*1~ 【發明所屬之技術領域】 本發明係為一種有關於影像處理方法，特別係指一種 利用對擷取影像中之色散現象的調整校正，來達到補償影 像色差的方法。 【先前技術】 影像擷取裝置’往往在擷取影像上都會面臨到「影像 色散」的問題。擷取影像之所以會發生色散的原因，主要 係因為影像中的三原色頻道（即R、G、B頻道）原本即各自 擁有不同的波長和折射率，所以導致影像擷取裝置的鏡頭 在掏取到影像之後’經由感光元件的處理後必然會產生 「影像色散」的現象，當「影像色散」現象過於嚴重時， 則會造成最後所輸出的影像產生「影像色差」的問題，必 須進行「影像色差補償」處理。 因此，若要能夠徹底解決「影像色差」的問題，便要 回歸到如何有效改善「影像色散」的問題之上。過去，一 般較為人所習知的做法便是在影像擷取裝置的硬體上作精 密設計，通常是在鏡頭的聚焦能力上下工夫，盡量使感光 元件所能夠接收到的影像三原色頻道能夠集中在一起，以 降低「影像色散」的嚴重程度，如此便可以使最終所產生 的影像能夠避免產生「影像色差」的問題。但是，這樣的 方式仍有包含至少以下兩方面的缺失··（1)硬體設計之精 密度有限，主要係由於硬體的設計受限於現有技術發展的 速度跟不上精密度需求的腳步，因此目前即便係以最精岔 的製作技術來設計硬體鏡頭，仍然無法使「影像色散」問1222317 V. Description of the invention (l) " 一 * 1 ~ [Technical field to which the invention belongs] The present invention relates to an image processing method, and particularly refers to a method of adjusting and correcting the dispersion phenomenon in the captured image to To achieve compensation for image chromatic aberration. [Previous Technology] The image capture device 'often faces the problem of "image dispersion" in capturing images. The reason for the dispersion of the captured image is mainly because the three primary color channels (the R, G, and B channels) in the image originally have different wavelengths and refractive indices, so the lens of the image capture device is being extracted. "After the image", the phenomenon of "image dispersion" will inevitably occur after processing by the photosensitive element. When the "image dispersion" phenomenon is too serious, it will cause the problem of "image chromatic aberration" in the final output image. Chromatic aberration compensation "processing. Therefore, if we can completely solve the "image chromatic aberration" problem, we must return to the problem of how to effectively improve "image dispersion". In the past, the more commonly known practice is to make precise design on the hardware of the image capture device, usually focusing on the focusing ability of the lens, so that the three primary color channels of the image that the photosensitive element can receive can be concentrated on Together, to reduce the severity of "image dispersion", so that the resulting image can avoid the problem of "image chromatic aberration". However, this method still includes at least the following two shortcomings: (1) The precision of the hardware design is limited, mainly because the design of the hardware is limited by the speed of the development of the existing technology and cannot keep up with the pace of precision requirements. , So even if the hardware lens is designed with the most sophisticated production technology, it still cannot make the image dispersion problem.

第7頁 1222317 五、發明說明（2) -- 題獲得最佳化的改善；及（2 )硬體設計成本昂貴，由於硬 體成本本身非常高昂，再加上對於精密度的要求不斷的提 高，導致生產一個足以滿足解決「影像色散」問題需长 鏡頭’往往必須花費相當高的單位成本，也是造成在影像 擷取裝置應用上一直無法普及的最大因素。 〜 因此，如何透過電腦軟體的輔助來徹底有效地解決過 去採用硬體設計方式所解決的「影像色散」現象，最終能 夠進一步以更低成本及更咼精密的軟體方法來處理「影像 色差補償」的問題，應是目前許多相關影像處理領域人士 所需要努力去解決的問題。 【發明内容】 有鑑於前述問題所在，本發明提出一種影像色差補償 方法’主要係透過電腦軟體輔助的方式來解決r影像色 散」的現象，進而達到解決「影像色差補償」的問題。 本發明係於影像擷取裝置初始化啟動時，透過對預先 a又置在影像擷取裝置上之校正片（calibration sheet)進 行影像擷取的動作，然後根據擷取影像中r、G、B各頻道 (channel)相對於校正片中各參考點所產生的色散距籬， 利用電腦軟體的運算來取得固定之色散校正比例，目的在 於當實際影像擷取時使各頻道於擷取影像中所產生的點都 能夠一致，進而使最終所輸出的影像能夠避免產生「影像 色差」的問題，達到「影像色差補償」的最終目的和功 效。 本發明更透過將前述電腦軟體運算後的色散校正比例 〜〇 X / 〜〇 X / 五、發明說明（3) =儲存，錢便可於每次擷取影像時都能夠直接利用所 2的内容快速地執行「影像色散」t周校的動作，進而有 欢率的完成「影像色差」補償的程序。 如下有關本發明具體可行之實施方式，兹就配合圖式說明 【實施方式】 本發明係一種影像色差補償方法，直主要係可以藉由 ^善影像擷取裝置100在擷取影像時所產生之影像色散現 骏罢進達t色差的方法，此處所述之影像擷取 感 置10 0係指掃描器、數位相機，或者其他可藉由鏡頭、 光元件進行影像擷取的光學儀器裝置。 「第1 一 a圖」為習知影像擷取裝置1 〇 〇之示意圖。其中 =^ 一般影像擷取裝置1 0 0所具有的基本組成元件，如： =碩1 (Π、感光兀件1 0 2、類比/數位轉換元件丨〇 3、影像處 办凡件1 0 4、纟己憶το件1 〇 5及其他···。透過鏡頭1 〇丨將外部 =像（如：校正片10)擷取之後，便由感光元件1〇2加以轉 t為對應的類比訊號，然後經由類比/數位轉換元件103再 將類比訊號轉換為可供影像處理元件104所能夠接受的數 ，訊號，並接續交由其他元件（圖中未顯示）去執行各種需 未的影像處理程序，最後儲存於記憶元件105當中，此 基本的影像擷取處理過程。 …、 然而，這樣的影像擷取處理過程，一直都存在的 是··影像在被擷取之後都會因為影像中R、G、B各頻道 (channel之間所具有的波長、折射率之不同而造成於 1222317 五、發明說明（4)Page 7 1222317 V. Description of the invention (2)-Improvements in the optimization of the problem; and (2) The cost of the hardware design is expensive, because the hardware cost itself is very high, coupled with the increasing requirements for precision This leads to the production of a long lens that is sufficient to meet the "image dispersion" problem. Often, it must cost a relatively high unit cost, which is also the biggest factor that has not been able to popularize the application of image capture devices. ~ Therefore, how to completely and effectively solve the "image dispersion" phenomenon that was solved by hardware design in the past with the assistance of computer software, and finally can further deal with "image chromatic aberration compensation" with a lower cost and more sophisticated software method The problem should be a problem that many people in the related image processing field need to work hard to solve at present. [Summary of the Invention] In view of the foregoing problems, the present invention proposes an image chromatic aberration compensation method ', which mainly solves the phenomenon of "r image dispersion" through a computer software-assisted method, thereby achieving the problem of "image chromatic aberration compensation". In the invention, when the image capture device is initialized and started, the image capture operation is performed on a calibration sheet (a) placed on the image capture device in advance, and then according to r, G, and B in the captured image. Relative to the dispersion distance fence generated by each reference point in the calibration film, the channel uses a computer software operation to obtain a fixed dispersion correction ratio. The purpose is to make each channel generated in the captured image when the actual image is captured. The points can be consistent, so that the final output image can avoid the problem of "image chromatic aberration" and achieve the ultimate purpose and effect of "image chromatic aberration compensation". In the present invention, the dispersion correction ratio calculated by the aforementioned computer software is ~ 〇X / ~ 〇X / V. Explanation of the invention (3) = storage, money can directly use the content of 2 every time an image is captured Quickly perform the action of “Image Dispersion” t week calibration, and then complete the “Image Chromatic Aberration” compensation process with joy. The following is a specific and feasible implementation manner of the present invention, which will be described in conjunction with the drawings. [Embodiment] The present invention is an image color difference compensation method, which is mainly generated by the image capture device 100 when capturing images. The method of image dispersion is advanced to achieve t-color aberration. The image capture sensor 100 described here refers to a scanner, a digital camera, or other optical instruments that can capture images through a lens or an optical element. The "first a picture" is a schematic diagram of a conventional image capturing device 1000. Where = ^ The basic components of a general image capture device 1 0 0, such as: = Master 1 (Π, photosensitive element 1 0 2, analog / digital conversion element 丨 〇3, image processing office 1 0 4 , 纟 自 忆 τοpiece 1 〇5 and others ... After the external = image (such as the correction sheet 10) is captured through the lens 1 〇 丨, it is converted by the photosensitive element 10 to the corresponding analog signal Then, the analog signal is converted into a number and signal that can be accepted by the image processing element 104 through the analog / digital conversion element 103, and is then handed over to other components (not shown in the figure) to execute various required image processing programs. , And finally stored in the memory element 105, this basic image acquisition process... However, such an image acquisition process always exists ... After the image is captured, it will be because of the R, G in the image. Channels B and B (different wavelengths and refractive indices between channels caused by 1222317 V. Description of the invention (4)

光元件10 2中對於影像中同—點的輸出長度結果有所不 同，也就是所谓的「影像色散 重時，則最=出的影像將會進一步產生於: 問題二ΠΙ解決這個問題，-般係透過對鏡頭= 之硬體言又/方式來加以改善（如「第卜中虛線所示範 圍），也就疋S加鏡頭i 0丨的聚焦精密度，盡量使影 頻道所產生的輸出長度結果能夠接近，但是 的 ^ 本過高，難料相需求的高精密度。㈣^成 本發明則j利用電腦軟體輔助的方式來改善這樣的問 題。請參閱「第Ι—b圖」的部分，如同「第工-a圖」中所示 影像擷取I置1 〇 〇 ’然而本發明的特徵在於增加一調校The output length of the same point in the image in the optical element 10 2 is different, which is the so-called "when the image dispersion is heavy, the most output image will be further generated from: Problem 2 ΠI solve this problem,-general It is improved through the hardware language and method of the lens = (such as "the range shown by the dotted line in the second section), that is, 疋 S plus the focusing precision of the lens i 0 丨, so as to make the output length produced by the video channel as much as possible. The results can be approached, but the cost is too high, and it is difficult to meet the high precision required. The cost invention uses computer software to assist in improving such problems. Please refer to the section "Figure Ⅰ-b", As shown in "Figure-a", the image capture I is set to 1 00 '. However, the present invention is characterized by adding a calibration

之 模組1 0 6，用以於影像擷取裝置i 0 〇啟動初始化時或者是在 每次擷取影像時開始執行運作，「第1 -b圖」中虛線所示 則為本發明方法實際的運作範圍，實際的方法流程圖請同 時參考到「第2圖」的部分，以下作詳細的說明。The module 10 is used to execute the operation when the image capture device i 0 〇 is initialized or starts each time an image is captured. The dashed line in the "Figure 1 -b" shows the actual method of the present invention. Please refer to the "Figure 2" section for the actual method flow chart and the detailed description below.

首先，本方法係於影像擷取裝置1 0 0開機啟動進行校 $時=作執行的，因此當影像擷取裝置1 0 0進行初始化 喪會先自設置在影像擷取裝置1 〇 〇上之校正片1 〇擷取一 二考…I占衫像（步驟2 〇 〇 )，此校正片（c a 1 i b r a t i〇n s h e e t )具 取旦/ V兩個以上的參考點（r e f e r e n c e m a r k )被用以校正擷 w $位置’本發明則根據影像擷取裝置1 〇 〇所取得之參 點影像中的這些參考點位置，來處理影像中r、G、 、/ 巴政調校；以兩個參考點為例，當取得參考點影像 之後’可以得知r、G、B各頻道在雨參考點之色散距離大First of all, this method is performed when the image capture device 100 is turned on and started for calibration. Therefore, when the image capture device 100 is initialized, the funeral is first set on the image capture device 100. The correction sheet 1 〇 captures one or two exams ... I occupy a shirt image (step 2 00). This correction sheet (ca 1 ibrati〇nsheet) has two or more reference points (referencemark) for correction. w $ position 'In the present invention, the r, G,, / / political adjustment in the image is processed according to the reference point positions in the reference point image obtained by the image capture device 1000; taking two reference points as an example, When the reference point image is obtained, it can be known that the dispersion distance of each channel of r, G, and B at the rain reference point is large

第10頁 1222317 五、發明說明（5) 小（如「第 之預定頻道相 此一預定頻道 以G頻道作為^ (步驟 40〇)，： 距離之用，其 1 ·該預 之兩參考點間 -其他頻道之 其中，距 最後，再將所 6 0 0 )，儲存之 時，在每次進 差補償的作用 本發明所 常是影像掏取 可於實際影像 其他頻道之色 對於影像中同 以避免輸出影 調整的方 參考點間距離 可使各頻道再 度之色散距離 a圖」所ί )，此時將先開始求取預先所設定 對於兩參考點> & # vrr β ”、、 色政距離大小（步驟3 0 〇 )， 陪7定頻疋首v 、1頻迢中的任何一個（通常選擇 _气=，接著，計算所謂的色散校正比例 Λ上，例係用㈣^ 表不万式如下·· 定Ϊ道之兩參考點間距離/第一直他頻道 兩參考點間距離道之兩參考點間距離/第 像素點（pixel)為計量單位； i二1之色散校正比例加以儲存（步驟 後便可以在影像擷取裝置1 00未重新啟動 行影像操取時重新執行本方法來達到影像色 提出的方法係執行於實際影像擷取之前， :置的校正階⑨，所記錄之色散校正比例二 擷取階段時，透過固定的調整比例來進j 散距離的調整，其調整的目的在於使各對 —點的顯示結果都能夠集中一致，如二=道 像造成色差的問題。 式則係將影像擷取後各頻道所產生之相對兩 ，分別乘上所記錄的色散校正比例，如此便 影像擷取階段時能夠保有與預定頻道相同| 1222317 五、發明說明（6) I 本發明方法亦可具有其他實施態樣，如：直接記錄預 定頻道之相對兩參考點間距離，然後於實際影像擷取時直 接將其他頻道的相對兩參考點間距離更換為預定頻道之相 對兩參考點間距離亦可。此外，本發明方法亦可應用於當 校正片中具有兩個以上參考點的情況（如：「第4圖」中所 示）；此時可透過同樣的方式分別記錄每兩個參考點間距 I離之色散校玉比例，然後於實際影像擷取時針對不同位置 丨進行個別的色散校正，如此將可使校正的效果更加明顯， |也更能夠解決影像色差的問題。 「第3-a圖」及「第3-b圖」則係本發明方法之具體實 |施例示意圖，本實施例中以兩個參考點為例。「第3一a I圖」為校正前的參考點影像7 0 1及R、G、B三頻道（即7 〇 2、 7 0 3、7 0 4 )之色散狀況不意圖’由圖中可知參考點影像了 〇 1 與各頻道之色散距離長度均不同（分別為a、b、c、峰 素），如此將會造成最後影像的色差問題。因此必須要進 ^亍景〉像色差補償。此時，設定以G頻道7 0 3作為預定頻道， 然後分別計算R頻道7 0 2與罐道7 0 4之色散校正比例，'分別 為R頻道7 0 2色散校正比例為c / b，B頻道7 0 4之色散校正比 例為c/d，最後將該色散校正比例給儲存起來（即i : c/b : c/d)，而此色散校正比例將留待影像擷取時對各頻道之 |散距離的調整之用。 當實際影像擷取過程中，則請參考「第3 —b圖」的部 分，此時透過本發明方法事先所儲存預定頻道之色散校7正 |比例（即l:c/b: c/d)來進行對其他各頻道之色散距離的Page 10 1222317 V. Description of the invention (5) Small (for example, "the scheduled channel is the same as the scheduled channel with G channel as ^ (step 40)): for distance, 1 · between the two reference points -Among the other channels, from the end, the data is stored again, and the effect of compensation for each time difference is stored. The present invention is often used for image extraction. The color of other channels in the actual image can be used for the same in the image. The distance between the square reference points for avoiding the output shadow adjustment can make the dispersion distance a of each channel again. ""), At this time, the preset reference points > &# vrr β 、, color Political distance (step 3 0), accompany any one of 7 fixed frequency heads v, 1 frequency head (usually choose _qi =, then calculate the so-called dispersion correction ratio Λ, for example, ㈣ ^ The following formula is as follows: · The distance between two reference points of the fixed channel / the distance between the two reference points of the other channel / the distance between the two reference points of the channel / the pixel point (pixel) is the unit of measurement; Save (After the steps, you can download When the image operation is restarted, this method is re-executed to achieve the image color. The proposed method is performed before the actual image acquisition: the correction level is set, and the recorded dispersion correction ratio is adjusted during the second acquisition phase through a fixed adjustment. The proportion is adjusted by the j-distance. The purpose of the adjustment is to make the display results of each pair-point can be concentrated and consistent. For example, two = channel images cause the problem of color difference. The formula is generated by each channel after the image is captured. Relative to two, multiply the recorded dispersion correction ratio respectively, so that the same channel can be maintained during the image acquisition phase. 1222317 V. Description of the Invention (6) I The method of the present invention can also have other implementation aspects, such as: Record the distance between the two reference points of the predetermined channel, and then directly replace the distance between the two reference points of other channels with the distance between the two reference points of the predetermined channel during the actual image capture. In addition, the method of the present invention can also It is used when there are more than two reference points in the calibration sheet (such as shown in "Figure 4"); at this time, it can be divided in the same way. Record the dispersion correction ratio of the distance I between each two reference points, and then perform individual dispersion correction for different positions during the actual image capture. This will make the correction effect more obvious, and it can also solve the problem of image chromatic aberration. The problem. "Figure 3-a" and "Figure 3-b" are specific implementations of the method of the present invention | The schematic diagram of the embodiment. In this embodiment, two reference points are used as an example. "Figure 3-a a I" It is not intended that the dispersion of the reference point image 7 0 and the three channels of R, G, and B (ie, 702, 7 0, 3, 7 4) before correction is not intended. The dispersion distance lengths of the channels are all different (a, b, c, and peak factor respectively). This will cause the problem of chromatic aberration in the final image. Therefore, it is necessary to perform chromatic aberration compensation. At this time, set the G channel 7 0 3 as the predetermined channel, and then calculate the dispersion correction ratios of the R channel 7 0 2 and the tank channel 7 0 4 respectively, 'the dispersion correction ratios of the R channel 7 0 2 are c / b, and B respectively. The dispersion correction ratio of channel 704 is c / d. Finally, the dispersion correction ratio is stored (i: c / b: c / d), and this dispersion correction ratio is reserved for each channel when the image is captured. | Used to adjust the distance. During the actual image acquisition process, please refer to the part “Figure 3 —b”. At this time, the dispersion correction of the predetermined channel stored in advance by the method of the present invention is 7 positive | ratio (ie l: c / b: c / d ) For the dispersion distance of other channels

1222317 五、發明說明（7) 調整，亦即將R頻道7 0 2及B頻道7 0 4之色散距離（即b和d )分 別乘上先前所記錄之色散校正比例（即c/b和c/d)，最後形 成如「第3-b圖」中所示，使R頻道7 0 2及B頻道7 0 4之色散 距離均與G頻道7 0 3同樣為c，如此將可以使各頻道對於影 像中同一點的輸出結果一致，進而可以解決掉產生影像色 差的問題。 以上所述者，僅為本發明其中的較佳實施例而已，並 非用來限定本發明的實施範圍；即凡依本發明申請專利範 圍所作的均等變化與修飾，皆為本發明專利範圍所涵蓋。1222317 V. Description of the invention (7) Adjustment, that is, multiplying the dispersion distance (ie, b and d) of R channel 7 0 2 and B channel 7 0 4 by the previously recorded dispersion correction ratio (ie c / b and c / d), finally formed as shown in "Figure 3-b", so that the dispersion distances of R channel 7 0 2 and B channel 7 0 4 are the same as G channel 7 0 3, so that each channel can The output results of the same point in the image are consistent, which can solve the problem of image color difference. The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention; that is, all equivalent changes and modifications made in accordance with the scope of the patent application for the present invention are covered by the scope of the present invention .

第13頁 1222317 圖式簡單說明 第1 - a圖係習知所提之影像擷取裝置示意圖； 第1 -b圖係本發明所提之影像擷取裝置示意圖； 第2圖係本發明所提之影像色差補償方法流程圖； 第3-a圖係本發明所提之影像色差補償方法校正前實施例 不意圖， 第3-b圖係本發明所提之影像色差補償方法校正後實施例 示意圖；及 第4圖係本發明所提之影像色差補償方法具多參考點 (reference mark)之校正片（calibration sheet)示意 葡。 【圖式符號說明】 10 校正片 1 0 0 影像擷取裝置 101 鏡頭 10 2 感光元件 103 類比/數位轉換元件 104 影像處理元件 105 記憶元件 106 調校模組 701 參考點影像 7 0 2 R頻道 7 0 3 G頻道 7 0 4 B頻道 步驟 2 0 0 擷取一參考點影像1222317 on page 13 illustrates the diagram briefly. Figure 1-a is a schematic diagram of the image capturing device mentioned in the prior art; Figure 1-b is a schematic diagram of the image capturing device mentioned in the present invention; Figure 2 is a schematic diagram of the present invention. Flow chart of the image color difference compensation method; Figure 3-a is not intended for the embodiment of the image color difference compensation method of the present invention before correction, and Figure 3-b is a schematic diagram of the embodiment of the image color difference compensation method of the present invention after correction And FIG. 4 is a schematic diagram of a calibration sheet with multiple reference marks for the method for compensating image color difference according to the present invention. [Illustration of Symbols] 10 Correction Film 1 0 0 Image Acquisition Device 101 Lens 10 2 Photosensitive Element 103 Analog / Digital Conversion Element 104 Image Processing Element 105 Memory Element 106 Calibration Module 701 Reference Point Image 7 0 2 R Channel 7 0 3 G channel 7 0 4 B channel step 2 0 0 Capture a reference point image

第14頁 1222317 圖式簡單說明 步驟 3 0 0 求取該參考點影像中一預定頻道相對於兩參考 點之色散距離 步驟 4 0 0 計算一色散校正比例 步驟 5 0 0 儲存該色散校正比例Page 14 1222317 Brief description of the diagram Step 3 0 0 Find the dispersion distance of a predetermined channel from the two reference points in the reference point image Step 4 0 0 Calculate a dispersion correction ratio Step 5 0 0 Save the dispersion correction ratio

Claims (1)

1222317 六、申請專利範圍 1. 一種影像色差補償方法，係透過對影像擷取裝置所攝 取之影像中各頻道之色散距離進行調整校正，以能夠 達到影像色差補償的方法，該方法包含下列步驟： 擷取一參考點影像； 求取該參考點影像中一預定頻道相對於兩參考點 之色散距離； 計算一色散校正比例；及 儲存該色散校正比例。 2. 如申請專利範圍第1項所述之影像色差補償方法，其中 該影像擷取裝置係指掃描器。 3. 如申請專利範圍第1項所述之影像色差補償方法，其中 該影像擷取裝置係指數位相機。 4. 如申請專利範圍第1項所述之影像色差補償方法，其中 該參考點影像中至少包含兩個參考點（r e f e r e n c e mark) o 5. 如申請專利範圍第1項所述之影像色差補償方法，其中 該參考點影像係取自至少包含兩個參考點之校正片 (calibration sheet)0 6. 如申請專利範圍第1項所述之影像色差補償方法，其中 該參考點影像係取自該影像擷取裝置上至少包含兩個 參考點之校正片。 7. 如申請專利範圍第1項所述之影像色差補償方法，其中 該預定頻道係可選自R頻道、G頻道、B頻道的群組組合 中 01222317 VI. Application for Patent Scope 1. An image chromatic aberration compensation method is a method for adjusting the chromatic dispersion distance of each channel in an image captured by an image capturing device to achieve image chromatic aberration compensation. The method includes the following steps: Acquire a reference point image; obtain the dispersion distance of a predetermined channel from the two reference points in the reference point image; calculate a dispersion correction ratio; and store the dispersion correction ratio. 2. The method for compensating image color difference as described in item 1 of the scope of patent application, wherein the image capturing device refers to a scanner. 3. The method for compensating image chromatic aberration according to item 1 of the scope of patent application, wherein the image capturing device is an index camera. 4. The method for compensating image color difference as described in item 1 of the scope of patent application, wherein the reference point image includes at least two reference marks. 5. The method for compensating image color difference as described in item 1 of the scope of patent application. , Where the reference point image is taken from a calibration sheet containing at least two reference points. 6. The image color difference compensation method described in item 1 of the patent application scope, wherein the reference point image is taken from the image. The calibration device includes at least two reference points on the capture device. 7. The method for compensating image color difference according to item 1 of the scope of patent application, wherein the predetermined channel is selected from the group combination of R channel, G channel, and B channel. 0 第16頁 1222317 六、申請專利範圍 8. 如申請專利範圍第1項所述之影像色差補償方法，其中 該色散校正比例為： Γ :該預定頻道之兩參考點間距離 /第一其他頻 道之兩參考點間距離：該預定頻道之兩參考點間距離 /第二其他頻道之兩參考點間距離； 其中，距離均係以像素點（p i X e 1 )為計量單位。 9. 如申請專利範圍第8項所述之影像色差補償方法，其中 該第一其他頻道及第二其他頻道係分別表示R頻道、G 頻道、B頻道中不同於該預定頻道之頻道。Page 16 1222317 VI. Patent Application Range 8. The method of image color compensation as described in item 1 of the patent application range, wherein the dispersion correction ratio is: Γ: distance between two reference points of the predetermined channel / the first other channel Distance between two reference points: the distance between two reference points of the predetermined channel / the distance between two reference points of the second other channel; wherein the distances are measured in pixels (pi X e 1). 9. The method for compensating image color aberration according to item 8 of the scope of the patent application, wherein the first other channel and the second other channel represent channels other than the predetermined channel among the R channel, the G channel, and the B channel, respectively. 1 0 .如申請專利範圍第1項所述之影像色差補償方法，其中 該方法係於該影像擷取裝置開機啟動進行校正時運作 執行。10. The method for compensating image chromatic aberration as described in item 1 of the scope of patent application, wherein the method is executed when the image capturing device is started for calibration. 第17頁Page 17