經Μ部中夾掠準杓兵Η消先合竹.·^印製 A7 _____B7___ 五、發明説明（I ) 發明領域 丨本發明係有關於能進行補償形變(di s tor Uon)之一種影像讀取 裝置（image reading apparatus)與方法,其可應用於任何影像感測元 件的光電產品，例如傳真機(Fax)和掃瞄器(Scanner)等。 發明背景 影像掃描裝置今日已廣爲運用於許多領域。近來，同時擁有反射 式（reflective)模式及穿透（transparent)模式的掃描裝置已被 發展出來。這類掃描裝置的基本原理及詳細構造可參酌美國專利號 4879604, 5514864, 5278674, 5185673。 進行影像掃描裝置前，須先對影像所依附之介質（original)施 以照明(illumination)。而照明所用之光源(light source)可爲一熱 1 陰極（hot cathode)或冷陰極（cold cathode)螢光燈管（fluorescent lamp)或光電二極体_)。 就像其他的光源一樣，掃描裝置內所安置之燈管於使用一段時間 後，其品質、性能及光源強度（intensi ty)就開紿變差 (deteriorate)。因此，掃描裝置的掃描品質就會比原先新光源的品質 差。另外一方面，透光性材質有不同的透光性，一個預設的光源強度對 另一種原件材質而言，有可能太亮或太暗。如此，將導致掃描的效果不 如預期。在此種情形下，目前影像讀取設備的感測器元腿乍時，都利 用一校正白片(calibration white plate)進行白準位補償。 但是，一般影像讀取設備除了光源不均勻(i n- homogeneous)的缺 失外，另有因光學系統，包含承載玻璃(platenglass) ι透鏡〇ens)、 反射鏡（reflective mirror)' 感測元件（photo sensors)等等，所造 080-pl74,PGR-9812-5 -1- 本紙張尺度进州中K 家榡彳(rNS：IA4^J&(210x297At) (請先閲讀背面之注f項再填寫本頁) 袭.The quasi-soldier soldiers are eliminated by the M part. · ^ Print A7 _____B7___ 5. Description of the invention (I) Field of the invention 丨 The present invention relates to an image reading capable of compensating deformation (di s tor Uon) Image reading apparatus and method, which can be applied to any optoelectronic products of image sensing elements, such as fax and scanner. BACKGROUND OF THE INVENTION Image scanning devices are widely used in many fields today. Recently, a scanning device having both a reflective mode and a transparent mode has been developed. The basic principle and detailed structure of this type of scanning device can refer to US Patent Nos. 4879604, 5514864, 5278674, 5185673. Before performing the image scanning device, illumination on the medium to which the image is attached must be performed. The light source used for lighting can be a hot cathode or a cold cathode fluorescent lamp or a photodiode. Just like other light sources, the quality, performance, and intensity of the light source (intensi ty) of the lamp tube installed in the scanning device will deteriorate and deteriorate after a period of use. Therefore, the scanning quality of the scanning device is inferior to that of the original new light source. On the other hand, translucent materials have different translucency. A preset light source intensity may be too bright or too dark for another original material. Doing so will cause the scanning results to be worse than expected. In this case, the sensor of the current image reading device uses a calibration white plate to compensate for the white level at the first time. However, in addition to the lack of inhomogeneous light sources in general image reading equipment, there are also optical systems including platen glass (lens), reflective mirrors, and sensing elements ( photo sensors) and so on, made 080-pl74, PGR-9812-5 -1- This paper is scaled into K homes in the state (rNS: IA4 ^ J & (210x297At) (Please read the note f on the back before (Fill in this page).
.1T 經滅部中决梂隼局β-T消资含作社印繁 A7 _ B7 五、發明説明（2 ) 成形變之缺失《針對這些光學元件，習知技術僅針對個別元件分別做 檢測篩選，以減少形變量。當影像醜裝廳裝完成後，光學系統造成 的形變量就會一直影響每一次的影像醜操作。 簡要說明 有鑑於此，本發明之目的即在於提供一種能補償影像形變之影像 裝置與方法。 因此，本發明提供一具形變補償能力的影像讀取裝置及方法，於 讀取影像前，讓本發明先讀取一校正片，此校正片上具有預定數量之 黑白相間條紋(stripes)圖案(pattern),此些黑讎圖案之精確位置 爲已知，稱之爲基準點或校正點。校正片讀取完畢後，可得到一相對應 之預定數量黑白相間條紋圖案，經判斷計算後可得到此些條紋圖案之 位置。 嗣後，計算該預定數量黑白相間條紋圖案之精確位置與影像讀取 後計算位置之差値，即得到各基準點之形變量。 將各基準點之形變量存入一記憶體中結束校正片讀取程序。當每 一次進行影像讀取時，存於記憶體中之各形變量被取出，以修正光學 系統造成之影像形變。 圖示說明 下面就配合附圖說明較佳實施例，藉以闈明本發明之方法、架構 及特點，其中： 、 第一圖揭示本發明之影像裝置的架構圖。 - 080-pl74,PGR*9812.5 ·2· 本紙張尺度適用中國1¾¾:標啥（（、NS ) Λ4現格（2ΙΟΧ297公菜） (錆先閲讀背面之注項再填寫本頁) -裝. *1Τ •部中决標莩局負-τ消於合竹社印*'·'本 A7 _____B7_ _____ 五、發明説明（3 ) 第二圖揭示校正片一實施例。 第三圖揭示本發明之影像裝置之操作流程圖。 實施例之說明 參考第一圖，本發明影像_裝置包含一影像抓取裝置11及光 源裝置13。影像抓取裝置11之作用在接收通過原件12之光信號120,並 傳送數位化影像信號由信號線124、界面116至與其連結的個人電P系 統15。如習知技術，微處理器114與個人電腦系統15間係藉一介面電路 116，如一個SCSI介面，將影像抓取裝置11與個人電腦系統15連結。 依本發明影像抓取裝置11之一實施例，影像抓取裝置11包含一 光電轉換元件110,如CCD或CIS模組，一類比/數位信號轉換器112, -記憶體118，一微處理器114及一界面電路116。CCD觀110將光 源信號120轉換成電壓信號122,並將其輸出至類比/數位信號轉換器 112。類比/數位信號轉換器112將影像信號以數位信號123型式輸出 至微處理器114。依原件上影像之特性，如正(pos i t i ve)影像或負 (negative)影像或依照其他預定之補償方式，微處理器114產生影像 資料。此影像資料經由信號線124,界面電路116送至個人電腦系統 15。 爲了補償光學系統造成之形變，本發明提供一校正片，如第二圖 所示，以便取得影像讀取裝置側向(X)軸各基準點上之形變値。校正片 具有預定數量之黑白相間條紋(stripes)圖案(pattern)，此些黑條紋 圖案中點線之精確位置爲已知値，x( 1)，x(2)，x(3)，...χ(η),稱之爲 校正點或基準點》 ' 於醜影像前，讓本發明先讀取前述校正片，同時將黑條紋圖案 之精確位置已知値，奴1),以2)，扣），_..3(11)由個人電腦系統15、 080-pl74,PGR-9812-5 >、紙張尺度述兄屮國) Λ4说格（2丨〇><297公笫） C請先閱讀背面之注^h項再填寫本頁) '裝· A7 _B7__ 五、發明説明（4) 界面電路116、信號線124送至贼理器114計算形變値。 校正片讀取過程中，CCD模組110將對應光源信號120轉換成電壓 信號122,並將其輸出至類比/數位信號轉換器112。類比/數位信號轉 換器112將影像以數位信號123型式輸出至微處理器114 〇依照一般 習知預定之補償方式，醜理器114產生對應影像資料，此對應影像資 料爲一相同預定數量黑白相間條较圖案,且經微處理器114判斷、計 算後可得到此些黑條紋圖案中點線之位置χ·(1)，χ_(2), χ·(3),… χ·(η)。理想狀態下無光學系統造成形變時，χ(1)=χ·(1), χ(2)=χ’（2)， χ(3)=χ·(3)，…，χ(η)=χ·(η)。實際狀態下光學系統造成形變時， 嗣後，計算該預定數量黑白相間條紋圖案之精確位置與影像讀取 後計算位置之差値，即得到各基準點之形變量。亦即，算出△ x(k)= x(k) - x’(k)，k=l，2, ...·，η。將各基準點之形變量Δχ(1〇由信 號線127存入記憶體118中結束校正片讀取模式。之後，可開始進行 ' 影像醜模式· 當進行影像讀取模式時，光線通過原件12後，由CCD模組110將 光源信號120轉換成電壓信號122,並將其輸出至類比/數位信號轉換 器112。類比/數位信號轉換器112將影像信號以數位信號123型式 輸出至微處理器114。除依照一般習知預定之補償方式，微處理器114 產生影像資料外，微處理器114還將先前存於記憶體118中之各形變 量Δ x(k)取出，以修正補償光學系統造成之影像形變。 藉由上述裝置及方法,本發明能將已經組合完成影像讀取裝置所 雜之形變予以補償，而得到更精確之影像讀取。 於第二圖揭露的校正片其黑條紋中心線間之距離爲已知,且條紋 寬度爲相等。但須知，於本發明之慨念下，條紋寬度可設計爲不等。 080-pl74,PGR-9812-5 -4- 本紙张尺度诚中阄1¾家標彳（（’NS > Λ4^ ( 210X297^-* ) (請先聞讀背面之注$項再填离本頁) ，裝. 訂 A7 B7 五、發明説明（jf ) 本發明之首要步驟爲提供—校正片，校正片上具有預定數量之黑 白相間讎圖案(pattern)，此些條紋圖案之精確位置爲已知値，χ⑴， x(2)，x(3)，.. ·χ(η)。接下來，請參閱第三圖的流程圖，本發明之影像 補償方法係包括下列步驟： (1) 判斷是否爲形變量計算模式(步驟100) (2) 使影像讀取裝置讀取校正片上該預定數量之黑白相間條紋圖 案，產生對應影像織步驟102) (3) 由對應影像資料，計算後可得到此些條紋圖案之位置 χ’（1)，χ’（2)，χ_(3)，...χ’（η)(步驟 1〇4) (4) 計算該預定數量黑白相間條紋圖案之精確位置與影像讀取後 計算位置之差値，得到各基準點之形變量ΔΧ(1)，ΔΧ(2), △ χ(3)， ... Δ χ(η)(步驟 106) (5) 將各基準點之形變量Δχ(ΐ)，ΔΧ(2)，ΔχΟ),... Δχ(η) 存入記億體(步驟108) (6) 進行影像讀取模式，產生一對應影像資料(步驟110) (7) 根據記億體中之各形變量Δχ(1)，Δχ(2), △xG)，.·. △ x(n)，將對應影像資料進行補償(步驟112) 本發明雖以一較佳實施例揭露如上，然其並非用以限定本發明。例 如：計算及修正形變量之過程亦可不在影像讀取裝置內執行，而在個 人電腦內完成。任何熟習此項技藝者，在不脫離本發明之精神和範圍內， 當可作省略、更動與潤飾。 080-pl74,PGR-9812-5 -5· 本紙张尺度ϋ州中國囚家榡?？（ CNS > Λ4%格（210Χ297公梦） -------ί:裝------、1Τ------/ (婧先閏讀背面之注$項再填寫本頁).1T β-T Consumer Information Bureau of the Ministry of Economic Affairs, Ministry of Economic Affairs, India, and India A7 _ B7 V. Description of the Invention (2) The lack of forming changes "For these optical components, the conventional technology only detects individual components separately. Filter to reduce the amount of deformation. After the installation of the ugly image hall is completed, the amount of deformation caused by the optical system will always affect each ugly image operation. Brief description In view of this, an object of the present invention is to provide an image device and method capable of compensating image distortion. Therefore, the present invention provides an image reading device and method with deformation compensation capability. Before reading the image, the present invention allows the present invention to read a correction sheet having a predetermined number of black-and-white stripe patterns on the correction sheet. ), The precise positions of these black dot patterns are known, and they are called reference points or correction points. After reading the calibration sheet, a corresponding predetermined number of black and white interlaced stripe patterns can be obtained, and the positions of these stripe patterns can be obtained after judgment and calculation. Then, calculate the difference between the precise position of the predetermined number of black and white and white stripe patterns and the calculated position after the image is read, to obtain the deformation of each reference point. The deformation amount of each reference point is stored in a memory to end the calibration sheet reading process. Each time an image is read, the deformation variables stored in the memory are taken out to correct the image deformation caused by the optical system. The following describes the preferred embodiment with reference to the drawings to clarify the method, architecture and features of the present invention, in which: 1. The first diagram discloses the architecture diagram of the imaging device of the present invention. -080-pl74, PGR * 9812.5 · 2 · This paper size is applicable to China 1¾¾: standard Han ((, NS) Λ4 grid (2 ΙΟχ297)) (锖 Please read the notes on the back before filling this page)-Pack. * 1Τ • The final award of the Ministry of Foreign Affairs-τ disappears in the seal of the Hezhu Society * '·' Ben A7 _____B7_ _____ V. Description of the invention (3) The second figure reveals an embodiment of the correction sheet. The third figure reveals the image of the present invention The operation flowchart of the device. For the description of the embodiment, referring to the first figure, the image _ device of the present invention includes an image capture device 11 and a light source device 13. The image capture device 11 is used to receive the light signal 120 passing through the original 12, and The digital image signal is transmitted from the signal line 124 and the interface 116 to the personal electrical system 15 connected to it. As is known in the art, the microprocessor 114 and the personal computer system 15 use an interface circuit 116, such as a SCSI interface. The image capturing device 11 is connected to the personal computer system 15. According to an embodiment of the image capturing device 11 of the present invention, the image capturing device 11 includes a photoelectric conversion element 110, such as a CCD or CIS module, and an analog / digital signal conversion. 112,-memory 118, a microprocessor 114 And an interface circuit 116. The CCD 110 converts the light source signal 120 into a voltage signal 122 and outputs it to the analog / digital signal converter 112. The analog / digital signal converter 112 outputs the image signal to the microcomputer as a digital signal 123 Processor 114. Based on the characteristics of the image on the original, such as a positive image or a negative image or other predetermined compensation methods, the microprocessor 114 generates image data. This image data passes through the signal line 124, the interface The circuit 116 is sent to the personal computer system 15. In order to compensate the deformation caused by the optical system, the present invention provides a correction piece, as shown in the second figure, in order to obtain the deformation on each reference point of the lateral (X) axis of the image reading device. The correction sheet has a predetermined number of black and white stripe patterns, and the precise positions of the dotted lines in these black stripe patterns are known to be 値, x (1), x (2), x (3),. ..χ (η), called the calibration point or reference point "" Before the ugly image, let the present invention first read the aforementioned calibration sheet, and at the same time the precise position of the black stripe pattern is known, slave 1), 2 ), Deduction), _ .. 3 (11) by the personal computer system 15 080-pl74, PGR-9812-5 >, the paper scale describes the country of brothers and sisters) Λ4 saying (2 丨 〇 > < 297) 笫 C Please read the note on the back ^ h before filling this page) '' Equipment · A7 _B7__ 5. Explanation of the invention (4) The interface circuit 116 and the signal line 124 are sent to the thief controller 114 to calculate the deformation 値. During the reading of the calibration sheet, the CCD module 110 converts the corresponding light source signal 120 into a voltage signal 122 and outputs it to the analog / digital signal converter 112. The analog / digital signal converter 112 outputs the image as a digital signal 123 to the microprocessor 114. According to a generally known and predetermined compensation method, the processor 114 generates corresponding image data, and the corresponding image data is a same predetermined amount of black and white. The bars are relatively patterned, and the positions of the dotted lines in the black stripe patterns χ · (1), χ_ (2), χ · (3), ... χ · (η) can be obtained after judgment and calculation by the microprocessor 114. When there is no deformation caused by the optical system in the ideal state, χ (1) = χ · (1), χ (2) = χ '(2), χ (3) = χ · (3), ..., χ (η) = χ · (η). When the optical system is deformed in the actual state, the difference between the precise position of the predetermined number of black and white stripe patterns and the calculated position after image reading is calculated, and the deformation of each reference point is obtained. That is, Δx (k) = x (k)-x '(k), k = 1, 2, ..., η are calculated. Save the deformation amount Δχ (10) of each reference point to the memory 118 by the signal line 127 to end the calibration sheet reading mode. After that, the image scan mode can be started. When the image reading mode is performed, light passes through the original 12 Then, the CCD module 110 converts the light source signal 120 into a voltage signal 122 and outputs it to the analog / digital signal converter 112. The analog / digital signal converter 112 outputs the image signal to the microprocessor as a digital signal 123 114. In addition to the conventionally-accepted compensation method, in addition to the microprocessor 114 generating image data, the microprocessor 114 also takes out the various deformation variables Δx (k) previously stored in the memory 118 to correct the compensation optical system. With the above-mentioned device and method, the present invention can compensate for the distortion of the image reading device that has been combined to obtain a more accurate image reading. The black stripe of the correction sheet disclosed in the second figure The distance between the center lines is known, and the stripe widths are equal. However, it should be noted that under the concept of the present invention, the stripe widths can be designed to be different. 080-pl74, PGR-9812-5 -4- The dimensions of this paper are honest in阄 1¾ house standard 彳 (('NS > Λ4 ^ (210X297 ^-*) (please read the note on the back of the page before filling out this page), order. A7 B7 V. Description of the invention (jf) The present invention The first step is to provide a correction sheet with a predetermined number of black and white interlaced 雠 patterns. The precise positions of these stripe patterns are known 値, χ⑴, x (2), x (3), .. · · χ (η). Next, please refer to the flowchart of the third figure. The image compensation method of the present invention includes the following steps: (1) determining whether it is a deformation variable calculation mode (step 100) (2) using an image reading device Read the predetermined number of black-and-white alternating stripe patterns on the correction sheet to generate the corresponding image weaving step 102) (3) From the corresponding image data, the positions of these stripe patterns χ '(1), χ' (2) can be obtained after calculation, χ_ (3), ... χ '(η) (step 104) (4) Calculate the difference between the precise position of the predetermined number of black-and-white stripe patterns and the calculated position after image reading to obtain the shape of each reference point Variables Δχ (1), Δχ (2), △ χ (3), ... Δ χ (η) (step 106) (5) Change the shape of each reference point to Δχ (Χ), Δχ (2) ΔχΟ), ... Δχ (η) is stored in the billionth body (step 108) (6) The image reading mode is performed to generate a corresponding image data (step 110) (7) According to each shape variable Δχ (1), Δχ (2), △ xG), .. △ x (n), compensate the corresponding image data (step 112) Although the present invention is disclosed as above with a preferred embodiment, it is not intended to limit this invention. For example, the process of calculating and correcting the amount of deformation can be performed not in the image reading device but in a personal computer. Anyone skilled in the art can make omissions, changes, and decorations without departing from the spirit and scope of the present invention. 080-pl74, PGR-9812-5 -5 · The paper size of Chinese prisoners in Luzhou? (CNS > Λ4% grid (210 × 297 public dream) ------- ί: equipment ------, 1T ------ / (Jing first read the note on the back and fill in this page)