TW395114B

TW395114B - Document detection method of scanner

Info

Publication number: TW395114B
Application number: TW87102374A
Authority: TW
Inventors: Jin-Da Wang; Shin-Jin Ye
Original assignee: Microtek Int Inc
Priority date: 1998-02-20
Filing date: 1998-02-20
Publication date: 2000-06-21

Abstract

A document detection method of scanner is provided for being used with a flat-top scanner equipped with auto paper feeding device to detect the tilt degree and the width of the document to be scanned. A press element is arranged on the scanning window of the auto paper feeding device. The press element may be of the pattern of several oblique black lines. The method detects the document width by using photographing device to read out the position of the lines covered by document at different scanning line positions. The time difference between the left/right side patterns of identicalscanning line position covered by the document is calculated to determine the tilt degree.

Description

五、發明説明（（1 ) ' --- [發明領域] 本發明係關於一種掃描器之文件檢測方法，特別是一種用於具有文件自動輸送功能之掃描器文件撿測方法。 [習知技術] I A^〇®atic Document Feeder) 經濟部中央標準局員工消費合作社印之掃描器1係用於連續掃描複數張疊合之文件2，其透岛自動送紙裝置使該文件逐一通過掃描視窗而取得影像。過圖一為搭載自動送紙機構U之平台式掃插器i，其中自動送紙裝置12係透定柱127與平台式掃描器/工、連結。前述自動送紙機構12包括··進紙杷盤lu、本體M2 及出紙把盤113。疊合之文件2係放置在進紙技盤⑴並通過本體II2掃描後而由出紙減lls收集。繼續參考圖 .二及圖三說明自動送紙程序，其中圖二為沿著掃描器工之 A-A線的剖面圖’而圖三為掃描器1之頂視圖。前述文件 2係如圖三箭頭21(進紙方向）所示之方向經由該掃描視窗工26通過掃描區域〗28且藉由在平台式掃插器1内之機架 137上的攝像裝置（未圖示）取得數位影像資料。複數張疊合之文件2置放於該進紙把盤ηι内，並藉由分紙滚輪及分紙壓板123分離一張文件後，經由成對送紙滾輪124 及125將該分離文件2逐一輸送以通過掃描視窗126，而進行掃描的動作，再經由出紙托盤II3將該k件2傳出。圖四顯示自動送紙機構12另一狀態之剖面圖。該圖顯示本體112沿縱向軸旋轉打開的情形。在使用自動送紙功能掃插時，如果文件2卡在本體112内之送紙通道，則τ將V. Description of the invention ((1) '--- [Field of the Invention] The present invention relates to a method for detecting a document of a scanner, and more particularly to a method for detecting and detecting a document of a scanner having an automatic document conveying function. ] IA ^ 〇®atic Document Feeder) The scanner 1 printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs is used to continuously scan multiple superimposed documents 2, and its automatic island feeding device allows the documents to pass through the scanning window one by one. Get the image. The first figure is a platform-type scanner i equipped with an automatic paper-feeding mechanism U, in which the automatic paper-feeding device 12 is a series of fixed columns 127 and the platform-type scanner / worker and connection. The automatic paper feeding mechanism 12 includes a paper feed tray lu, a main body M2, and a paper output tray 113. The superimposed document 2 is placed in the paper feed tray and scanned by the main body II2 and collected by the paper output minus lls. Continue to refer to FIG. 2 and FIG. 3 to explain the automatic paper feeding procedure, in which FIG. 2 is a cross-sectional view along the line A-A of the scanner's work and FIG. 3 is a top view of the scanner 1. The aforementioned document 2 is the direction shown by the arrow 21 (paper feed direction) in FIG. 3 through the scanning window 26 through the scanning area 28 and the camera device (not shown) on the frame 137 in the flatbed scanner 1 (Icon) Get digital image data. A plurality of superimposed documents 2 are placed in the paper feed tray η, and a document is separated by a separation roller and a separation platen 123, and the separated documents 2 are passed through the pair of paper feed rollers 124 and 125 one by one. The document is conveyed to pass through the scanning window 126 to perform a scanning operation, and then the k-piece 2 is conveyed through the paper output tray II3. FIG. 4 is a sectional view showing another state of the automatic paper feeding mechanism 12. This figure shows a case where the body 112 is rotated and opened along the longitudinal axis. When using the automatic paper feed function, if Document 2 is stuck in the paper feed path in the main body 112, τ will

本紙張尺度適财ϋϋ^#5Tc'NS ) A4*m ( 2IOX297^iT 、發明説明（2) 本體112打開以清除文件2而繼續送紙掃描。 [發明所欲解決之問題] 在使用掃描器掃描文件時，影響掃描速度最大的因素為影像處理及資料傳輸時間。因此，如果可以確知文件的邊界範圍，便可消除不必要的影像處理及資料傳輪時間進而大幅提升掃描速度。再者，當在自動送紙機構内的文件並非以垂直進紙方向進紙時，不但容易形成對文件寬度範圍的誤判並且造成文件在送紙通道中推擠破壞而使掃描終止。由圖三可知掃描區域〗28的寬度必定大於或等於文件 2的寬度，因此為消除不必要的掃描處理及傳輪時間，習知的掃描器通常會在自動送紙機構U之本體US位置ρ 裝設一檢測裝置，前述位置P係在自動送紙機構12之本體112靠近進紙托盤ηι位置（如圖四所示）。該檢測裝置可在文件㈣前緣進人掃描視窗126時，預先_蚊件 2的寬度藉此決定所需處理影像之邊界。 ' 參考圖五，習知的檢測裝置具有下列三種態樣：一、如圖五（A)所示，檢測裝置&係在参體ιΐ2之位置 p裝設-列複^斷式感測器31，魏測器31位方靠近前述進紙減ni之掃減f 126上呈—直線排列上該列感測n 31係垂直文件2的進紙方向21 (。當文件2 r 進紙方向21前進時’因為文件2遮斷特定複數個感測署㈣光源’所以掃描器i藉由遮_職31的數目測务文件约略寬度。惟，該檢測裝置3需設置額外的電子經濟部中央標準局負工消費合作社印製五、發明説明（3 ) =增加其成本’且其準確度由感測器⑴數目歧。因此，欲提高檢測準確度，勢必更大幅增加製造成本及困難度。見士一、如圖五⑻所示’檢測裝置係在本體i12之位置P I設-橫向的壓制元件4。進—步參考圖式，在壓制元件 ^綠製平行進紙方向21而相互_的複數個黑色條紋二。在文件2运紙前，平台式掃描器1之機架137 預先㈣並停止在黑色條紋圖樣41位置；當文件2前進該黑色條紋圖樣41時’掃描器1藉由機架⑶之 /裝置讀取被文件2遮蔽之黑色條紋圖樣^，並根據 =樣41位置及數目而餐文件2树的寬度，且該檢測衣置4的準確度由平行黑色條紋圖樣ο的密度決定。惟，該圖樣41之密度因製造及裝置的限制而有其上限， .因此，其準確度亦錄_樣41之蚊上限。 “二、如圖五⑹所示，檢測裝置係在本體112之位置P ㈣吉H件5。進—步參考圖式，絲制元件5上繪紙方向21之—條黑色直線圖樣51。在文件2送紙前’平台式掃描器i之機架137預先移動並停止在莖色 ::圖:：位置;當文件2前進而遮斷該黑色直線圖樣時’ #描器！藉由機架137掃描文件2前緣所遮蔽栗色的位置而測得文件2的寬度。惟，該檢測裝置:別為“較暗的文件容易造成誤判以成掃插結果不氣甩—。再者’前述習知之檢測裝置無法價測文件進度。因此，當文件並非以垂直進紙方向進紙時，不但本紙張尺錢财關--The size of this paper is ϋϋ # 5Tc'NS) A4 * m (2IOX297 ^ iT, description of the invention (2) The main body 112 is opened to clear the document 2 and the paper feed scanning is continued. [Problems to be Solved by the Invention] When using a scanner When scanning a document, the biggest factor that affects the scanning speed is the time of image processing and data transmission. Therefore, if the boundary range of the document can be determined, unnecessary image processing and data transfer time can be eliminated to further increase the scanning speed. Furthermore, When the document in the automatic paper feeding mechanism is not fed in the vertical feeding direction, it will not only easily cause misjudgment of the document width range, but also cause the document to be pushed and destroyed in the paper feeding channel and the scanning will be terminated. The scanning area can be seen from Figure 3. The width of 28 must be greater than or equal to the width of Document 2. Therefore, in order to eliminate unnecessary scanning processing and transfer time, the conventional scanner usually installs a detection device at the US position ρ of the main body of the automatic paper feeding mechanism U. The aforementioned position P is at the position close to the paper feed tray 112 of the main body 112 of the automatic paper feeding mechanism 12 (as shown in Fig. 4). The detection device can enter the person at the leading edge of the document stack. When the window 126 is traced, the width of the mosquito member 2 is determined in advance to determine the boundary of the image to be processed. ′ Referring to FIG. 5, the conventional detection device has the following three aspects: 1. As shown in FIG. 5 (A), the detection The device & is installed at the position of the reference body 2-a row-reset sensor 31, the Wei-31 sensor is located near the aforementioned paper feed minus the sweep minus f 126-linearly arranged on the row of senses Measure n 31 is the feed direction 21 of the vertical document 2. (When the document 2 r feed direction 21 advances, 'Because document 2 blocks a specific plurality of sensory light sources', so the scanner i The number of test documents is approximately wide. However, the detection device 3 needs to be set up by the Central Standards Bureau of the Ministry of Electronic Economics and printed by the Consumers 'Cooperative. V. Description of the invention (3) = Increase its cost' and its accuracy is determined by the sensor. The number is different. Therefore, if you want to improve the detection accuracy, it will inevitably increase the manufacturing cost and difficulty. See Shiyi 1. As shown in Figure 5 ', the detection device is located at the position i12 of the body i12-a horizontal pressing element 4. —Step-by-step reference pattern, in the parallel feed direction 21 made of pressing element ^ green A plurality of black stripes with each other 2. Before the document 2 is transported, the rack 137 of the flatbed scanner 1 is preliminarily stopped and stopped at the black stripe pattern 41; when the document 2 advances to the black stripe pattern 41, 'Scanner 1' The black stripe pattern occluded by file 2 is read by the frame ⑶ / device, and the width of the tree of meal file 2 is determined according to the position and number of sample 41, and the accuracy of the detection set 4 is from the parallel black stripe pattern The density is determined by ο. However, the density of the pattern 41 has an upper limit due to manufacturing and device restrictions. Therefore, its accuracy is also recorded in the upper limit of the mosquito of sample 41. "Second, as shown in Figure 5, the detection device It is tied at the position P of the main body 112, and the H piece 5. Further reference is made to the drawing, and a black straight line pattern 51 is drawn on the silk element 5 in the paper direction 21. Before the document 2 is fed, the rack 137 of the flatbed scanner i moves in advance and stops at the stem color :: Figure :: position; when the document 2 advances and blocks the black straight pattern ’#Descr! The width of Document 2 was measured by scanning the position of the maroon shaded by the leading edge of Document 2 by the frame 137. However, the detection device: do n’t say “Darker documents are likely to cause misjudgment to be scanned without interrupting the results.” Furthermore, the aforementioned conventional detection device cannot measure the progress of the document. Therefore, when the document is not in the vertical feeding direction When feeding paper, not only the paper rule, money and wealth-

經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（4 ) 對文件寬度範圍的誤判並且容易造成文件在掃描視窗中推擠破壞而使掃描終止。 [解決問題之方法] 本發明之檢測方法係在自動送紙機構設置一具有複數條對稱中心線平行黑色圖樣之壓制元件，當文件前緣由自動送紙機構送紙進入掃描視窗時，文件將遮蔽前述圖樣並藉由比較掃描信號與初始信號之差異決定文件的歪斜程度及寬度，該檢測方法係以攝像裝^在不同掃描線位置讀取直線被文件遮蔽的位置來檢測文件寬度，並計算在同一掃描線位置左古兩侧圖樣被文件遮蔽之時間差判定其歪斜程度。藉此掃描器根據本發明之方法可同時準確偵測文件的歪斜程度及寬度。 .Printed by the Employees' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (4) Misjudgment of the document width range and easily cause the document to be pushed and destroyed in the scanning window and the scan to be terminated. [Method for solving the problem] The detection method of the present invention is to set a pressing element with a plurality of symmetrical center line parallel black patterns on the automatic paper feeding mechanism. When the leading edge of the document is fed into the scanning window by the automatic paper feeding mechanism, the document will be masked The aforementioned pattern determines the skewness and width of the document by comparing the difference between the scanning signal and the initial signal. The detection method uses a camera to read the position where the straight line is obscured by the document at different scanning line positions to detect the document width and calculate the The time difference between the patterns on the left and the left of the same scan line that are obscured by the file determines the degree of skew. Thus, the scanner can accurately detect the skewness and width of the document at the same time according to the method of the present invention. .

[圖式之簡單說明] 圖一為搭載自動送紙裝置之平台式掃描器之立體圖。圖二為沿著圖一之平台式掃楹器的A-A線-之剖面圖。 _三為圖·一平台式掃描之頂.視.圖. 圖四為自動送紙機構另一狀態之剖面圖，其中顯示自勢送紙機構未與平台式掃描器結合。圖五為用於自動送紙掃描器之習知檢測裝置不同實施例之示意圖。 < 圖六為本發明檢測方法之壓制元Γ件示意圖。-圖七為本發明文件以傾蘇角度-通暴壓制元件之示复圖本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閱讀背面之注意事項再填寫本頁)[Brief description of the drawings] Fig. 1 is a perspective view of a platform scanner equipped with an automatic paper feeding device. FIG. 2 is a cross-sectional view taken along line A-A of the platform sweeper of FIG. 1. FIG. _3 is the top of a flat-bed scanning. View. Figure. Figure 4 is a sectional view of another state of the automatic paper feeding mechanism, which shows that the self-feeding paper feeding mechanism is not combined with the flatbed scanner. Fig. 5 is a schematic diagram of different embodiments of a conventional detection device for an automatic paper feed scanner. < FIG. 6 is a schematic diagram of a pressed element Γ of the detection method of the present invention. -Figure 7 is a copy of the invention document at the tilting angle-Compression suppression components. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before filling this page)

經濟部中央標隼局員工消費合作社印製 A7 '___ ______B7 [、發明説明（5 ) '~~ - 圖八為本發明文件進給時，通過壓制元件之示意圖。圖九為本發明檢測方法之流程圖。 [發明之詳細說明] 參考圖式說明本發明之較佳實施例。圖六為本發明檢測方法之壓制元件示意圖，其中本發月之檢測方法係在本體11S的掃描視窗12e上且靠近進紙把盤111位置（即圖五中位置？）設置一壓制元件6。參考圖六（A)’說壓為it!之黑色直線圖樣61及62，其中該·黑色直線圖樣61及62係與文件2的進紙方向21 王一特定角度（例如：120。或135。）’且該黑色直線圖樣 61及62係對稱壓制元件6的中心線略呈平行排列。在較佳實施例中，該壓制元浮黠在直接形成在本體m上。繼續參考圖六（b)，為清楚顯示壓制元件6在各位置之信號表現而將該壓制元件6水平等分為ai J·.及a2至j2共20個區間，.並依文件2的進紙方向21 將該壓制元件6等分為八至1?的位置。首先參考圖七’說明本發明用以檢測文件傾斜程度的方法，圖七顯示文件2以傾斜角度通過壓制元件6之示意 ®。值得注意的是，文件2在掃描視窗126内移動時，在平〇式掃描器1内的機架I37將比文件2提知移動到預定位置（例如：位置A、B ' c、D、Ε及F )，其中，機木之攝像裝置並讀取該位置之初始影像資料，以圖七為例’機架I37係移動到虛線C的位置而讀取位置c之初 -—~~- (請先閲讀背面之注意事項再填寫本頁}Printed by the Employees' Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs A7 '___ ______B7 [, Description of Invention (5)' ~~-Figure 8 is a schematic diagram of the pressing components when feeding the document of the present invention. FIG. 9 is a flowchart of the detection method of the present invention. [Detailed description of the invention] A preferred embodiment of the present invention will be described with reference to the drawings. Fig. 6 is a schematic diagram of the pressing element of the detection method of the present invention, wherein the detection method of the present month is to set a pressing element 6 on the scanning window 12e of the main body 11S and near the paper feed tray 111 (ie, the position in Fig. 5?). Referring to FIG. 6 (A), it is said that the black straight patterns 61 and 62 are pressed with it !, wherein the black straight patterns 61 and 62 are at a specific angle from the paper feeding direction 21 of the document 2 (for example, 120. or 135). ) 'And the center lines of the black straight patterns 61 and 62 are symmetrically arranged in parallel. In a preferred embodiment, the pressed element float is directly formed on the body m. Continuing to refer to FIG. 6 (b), in order to clearly show the signal performance of the pressing element 6 at each position, the level of the pressing element 6 is equally divided into ai J ·. And a2 to j2 in 20 intervals. The paper direction 21 equally divides the pressing member 6 into positions of eight to 1 °. First, the method for detecting the inclination of a document according to the present invention will be described with reference to FIG. 7 ′. FIG. It is worth noting that when the file 2 moves in the scanning window 126, the frame I37 in the flat scanner 1 moves to a predetermined position than the file 2 (for example, positions A, B'c, D, E And F). Among them, the camera device of the machine and read the initial image data at that position. Take Figure VII as an example. 'The rack I37 is moved to the position of the dotted line C and the beginning of the position c is read --- ~~-( Please read the notes on the back before filling out this page}

A7 經濟部中央標準局員工消費合作社印製五、發明説明（始4號。此時，自動送紙機構12開始饋入文件2，圖七 (A)顯不鱗之文件2的左前緣遮蔽左圖樣62的狀態，而 ▲圖七⑻顯示傾斜之文件2的古前緣遮蔽古圖樣62的狀態。經由攝像裝置持續地讀取在該位置c的影像資料，並比較圖樣ei及/或e2的影像資料與初始影像資料是否產生 '楚化。如圖七所示，根據所讀取的資料，可陸續偵測到圖七（A)之ci影像產生變化，及圖七（幻之c2影像產生變化。右文件未傾斜，則cl及。影像產生變化的時間間隔為〇(表示在cl及c2影像同時產生變化）.；反之，若文件傾斜時’則Cl及c2影像產生變北的時間會有間隔（表示在Cl及c2影像並非同時產生變化）。由於文件2的移動速度固疋，故文件2的傾斜程度正比於前述之時間間隔大』。藉此，掃描器可設定一容許範圍之時間間隔以檢測文件傾斜程度’若時間_大於容許範圍，則表示文件2傾斜過大。繼續參考圖八，說明本發明用以檢測文件寬度檢測的方法。圖八顯示文件2沿進紙方向21進入掃描視窗126 之動作圖。值知庄意的是，文件2在掃描視窗〗26内移動時在平台式掃描器i内的機架以7將比文件2提前移動到預定位置（例如：位置A、B、C、D、E&F)，文件2通過該位置取得信號後再移動到下一匕置。當開始檢測文件時，機架會事先移動到位置A，並持續讀取位置A的影像資料，並檢測圖樣ei與62是否有遭化。當文件2的前緣進入掃描視窗而到達位待A7 Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. 5. Description of the invention (beginning of No. 4. At this time, the automatic paper feeding mechanism 12 starts to feed Document 2. Figure 7 (A) shows the left front edge of Document 2 that is not visible. The state of the pattern 62, and ▲ Figure VII shows the state where the ancient leading edge of the oblique file 2 obscures the ancient pattern 62. The image data at the position c is continuously read through the camera device, and the pattern ei and / or e2 are compared. Whether the image data and the initial image data are generated. As shown in Fig. 7, according to the read data, changes in the ci image in Fig. 7 (A) can be detected, and Fig. 7 (magic c2 image generation) Change. The right file is not tilted, then the interval between cl and. Image changes is 0 (indicating that both cl and c2 images change at the same time). Conversely, if the file is tilted, the time when Cl and c2 images become north will change. There is a gap (indicating that the Cl and c2 images do not change at the same time). Because the moving speed of file 2 is fixed, the tilt of file 2 is proportional to the aforementioned time interval. "By this, the scanner can set an allowable range of time interval Detecting the tilt of the document 'If time_ is greater than the allowable range, it means that the tilt of the document 2 is too large. Continuing to refer to FIG. 8, the method for detecting document width detection according to the present invention will be described. FIG. It is worth knowing that the document 2 moves in the scanning window 26 and the rack in the platform scanner i moves to a predetermined position ahead of the document 2 by 7 (for example: position A, B, C, D, E & F), file 2 gets the signal through this position and then moves to the next position. When the file is detected, the rack will move to position A in advance, and continuously read the image data of position A. And check whether the patterns ei and 62 have been altered. When the leading edge of file 2 enters the scanning window and arrives in place

.置A -----^---_I . C (請先閲讀背面之注意事項再填寫本頁).Set A ----- ^ ---_ I. C (Please read the notes on the back before filling this page)

,1T 本-.氏張尺度適用中卿家標準（CNs )从規格（公缝）發明説明（7) 時（參考圖八（A))’因為文件2遮蔽位置a之黑色直線圖樣61及62，攝像裝置擷取位置A的影像並檢測到gl、 J'l、g2及J2四個區間影像改變，因圖樣61與62均被文件覆蓋住，故判定文件2的寬度必大於gl至§2的距離。接著，將機架I37移至下一位置，例如位置B，持續讀取位置B的影像資料’並檢測是否圖樣^與犯有影像變化。當文件2的前緣繼續向前移動而到達B位置時（參考圖八（B))，文件2遮蔽位置B之黑色直線圖樣61及62，所以攝像裝置擷取位置B的影像並檢測到el、hl、心及h2四個區間影像改變，因圖樣61與62均被文件覆蓋住’故判定文件2的寬度必大於^至以的距離。重複前述步驟，在機架137移動到.位置c且文件2的前緣向前移到C位置時（參考圖八（c))，因為文件2遮蔽位置c之黑色直線圖樣61，但並未遮蔽圖樣62，所以信號變化的部份只有f 1與f 2。由此可知，當黑色直線圖樣62區間不再變化時，便可準確測得文件2的左古邊界而彳貞察出文件2的寬度。另外，由黑色直線圖樣61.區間變化的移動亦做為重^檢測文件2的寬度，以避免因為誤判而導致掃描結果錯誤。 .在另-實施例中，本發明亦可同時檢測文件2寬度及傾斜程度，圖九顯示該方法之流程圖，兹說，明如下广步驟-：將機架137移至慶制元件6的前緣（例如位置 A)，亚啟動自動送紙機構U開始饋入文件2。步驟二：以攝像裝置讀取該位置之婦描線信號作為初經濟部中央標準局員工消費合作社印製 A7 B7 五、發明説明（8 ) 始影像信號。步驟三：持續以攝像裝置讀取在該位置的掃描線影像信號。步驟四：與步驟二之初始信影像號比較，若所讀取的影像信號沒有變化則跳回步驟三；若影像信號產生變化，則進行下一步騾。步驟五：根據機架137位置設定計時器之預設值，並開始計時。步驟六：繼續讀取該位置影像資料並檢測左古壓制元件之影像信號，若兩側均有圖樣61或62被文件遮住，則跳至步驊八；若只有一側被文件遮住則進行下一步驟。步驟七：若計時器之值超過前述預設值，則跳至步驟十一，否則跳回步驟六。步驟八：若僅有内側圖樣61被文件遮住，則跳至步驟十；否則進行下一步驟。步驟九：將機架137移至下一檢測位置，並跳回步驟二。步驟十：記錄該位置之外侧圖樣62的位置以作為文件之寬度。步驟Η-—：停止送紙並發出警告信號。 [發明故果] < 根據本發明之檢測方法可同時偵測文件在進給時的歪斜程度及待掃描寬度，藉此避免己歪斜之文件繼續進給而導致文件在掃描視窗中推擠變形，且決定掃描寬度以減本紙張尺度適用中國國家標準（CNS ) Α4規格（210X 297公釐） (讀先閱讀背面之注意事項再填寫本頁), 1T This-. Zhang's scale applies the Zhongqing Family Standards (CNs) from the specifications (common seam) when the invention is explained (7) (refer to Figure 8 (A)) 'Because of the black line pattern 61 and 62 of the shielding position a of file 2 , The camera captures the image at position A and detects the four interval image changes of gl, J'l, g2, and J2. Because the patterns 61 and 62 are covered by the file, it is determined that the width of file 2 must be greater than gl to §2 the distance. Next, the rack I37 is moved to the next position, for example, the position B, and the image data of the position B is continuously read, and it is detected whether the pattern ^ and the image have been changed. When the leading edge of document 2 continues to move forward to reach position B (refer to Figure 8 (B)), document 2 masks the black straight patterns 61 and 62 at position B, so the camera captures the image at position B and detects el The images of the four sections, hl, heart, and h2 change. Because the patterns 61 and 62 are covered by the file ', it is determined that the width of file 2 must be greater than the distance of ^ to. Repeat the above steps, when the frame 137 moves to the. Position c and the leading edge of the file 2 moves forward to the position C (refer to Figure 8 (c)), because the black line pattern 61 of the position 2 is blocked by the file 2 but not The masking pattern 62, so the signal changes only f 1 and f 2. It can be known that when the interval of the black straight pattern 62 no longer changes, the left ancient boundary of the file 2 can be accurately measured and the width of the file 2 can be detected. In addition, the movement of the interval change from the black straight pattern 61. is also used to double-check the width of file 2 to avoid erroneous scan results due to misjudgment. In another embodiment, the present invention can also detect the width and inclination of file 2 at the same time. Figure 9 shows the flow chart of the method. Here, the following steps are explained:-Move the frame 137 to the control element 6 At the leading edge (for example, position A), the sub-start automatic paper feeding mechanism U starts to feed the document 2. Step 2: Use the camera to read the women's tracing signal at this location as the initial printed A7 B7 by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs. 5. Description of the invention (8) Start the image signal. Step 3: Continue to read the scanning line image signal at this position with the camera. Step 4: Compare with the initial signal image number of step 2. If the read image signal does not change, go back to step 3. If the image signal changes, go to the next step. Step 5: Set the timer's preset value according to the position of frame 137 and start timing. Step 6: Continue to read the image data at this location and detect the image signal of the left ancient suppression component. If there are patterns 61 or 62 on both sides covered by the file, skip to step 8; if only one side is covered by the file, then Go to the next step. Step 7: If the value of the timer exceeds the preset value, skip to step 11; otherwise, skip to step 6. Step 8: If only the inner pattern 61 is covered by the file, skip to step 10; otherwise, proceed to the next step. Step 9: Move the rack 137 to the next detection position and skip back to Step 2. Step 10: Record the position of the pattern 62 outside the position as the file width. Step Η-—: Stop feeding and issue a warning signal. [Inventive results] < The detection method according to the present invention can simultaneously detect the skewness and width of the document to be scanned at the same time, thereby preventing the skewed document from being continuously fed and causing the document to be pushed and deformed in the scanning window. , And decided to scan the width to reduce the size of this paper to apply the Chinese National Standard (CNS) Α4 specifications (210X 297 mm) (read the precautions on the back before filling in this page)

'1T A7 B7 五、發明説明（5 ) 少掃描時間。另外，根據本發明之檢測方法，因其具有特別之黑白相間圖樣，即使文件的前緣色彩較暗亦不會因此而誤判文件的寬度。再者，本發明之檢測方法其偵測文件寬度準確度極高，且不增加硬體成本及製造困難度，因此可大幅降低影像處理及資料傳輸時間並增加掃描的準確度。在詳細說明本發明之較佳實施例後，熟悉本技術人士可清楚了解，並在不脫離本發明申請專利範圍與精神下，所作之變化及改變皆為本發明專利所保護範圍内。 --------^彳裝：-- C (請先聞讀背面之注意事項再填寫本頁)'1T A7 B7 V. Description of the invention (5) Less scanning time. In addition, according to the detection method of the present invention, because it has a special black and white phase pattern, even if the leading edge of the document is dark, the width of the document will not be misjudged because of this. Furthermore, the detection method of the present invention has extremely high accuracy in detecting document widths, without increasing hardware cost and manufacturing difficulty, so it can greatly reduce image processing and data transmission time and increase scanning accuracy. After a detailed description of the preferred embodiments of the present invention, those skilled in the art will clearly understand that, without departing from the scope and spirit of the patent application of the present invention, changes and modifications are all within the protection scope of the invention patent. -------- ^ Outfit:-C (Please read the notes on the back before filling in this page)

,1T 經濟部中央標準局員工消費合作社印製本紙張尺度適用中國國家標率（CMS ) Α4規格（210X297公釐）, 1T Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs This paper size applies to China National Standards (CMS) Α4 specifications (210X297 mm)

Claims

經濟部中央標準局員工消費合作社印製 A8 B8 C8 D8六、申請專利範圍 . 1 . 一種掃描器之文件檢測方法.，係用於·搭載.真動送紙裝置之平台式掃描裝置來自動檢測文件之寬度及歪斜度，該自動送紙裝置在掃描視窗上形成對稱於中心之左右複數條黑色直線圖樣且文件對稱於中央被送入，-其檢測方法包含下0步驟：步驟一：將機架移至掃描視窗前緣位置的前緣，並啟_ 動自動送紙機構開始饋紙；步驟二：持續讀取該位置之_盈像_，並比較前述黑色直線圖樣的影像信號，直到影像信號變化；步驟三：根據機架体置設定計時器之預設值，並開_ ___^ "· 始計時；步驟四：繼續讀取該位置影像資暴並檢測左右黑色-直線圖樣之影像信號，若兩側圖樣均被文件遮住，_则_跳至步驟六；若只有一側被文侏遮住則進#下一步驟」步驟五：若計數器值超過前述預設值，則跳至步驟。九，否則跳回步驟四；步驟六：若僅有内側圖樣β 1被文件遮隹、，則跳革步 ,寧八;否則進行下一步驟；步驟七：將機架移至下一檢測位置，並跳回步驟二；步驟八：記錄讓位置之外側圖位—1以#-為文件之寬度，並將機架務掃m，預備開始掃描；步驟九：停止送紙並發出警告信號。 2.—種掃描器之文件檢測方法，係用於搭載自動送紙 (請先閱讀背面之注意事項再填寫本頁) D 訂 -I®. 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐）經濟部中央標準局負工消費合作社印裝 A8 B8 C8 D8 六、申請專利範圍裝置之平台式掃描裝置來自動檢測文件之歪斜度，該自動送紙裝置在掃描視窗上形成對稱於中心之左右複數條黑色直線圖樣且文件對稱於中央被送入，其檢測方法包含下 .-一^ - 列步驟： ..步驟一：將棒架移一至一掃—播—視jut緣一位置—的前緣，並啟 i： ..... * *- L » 動自動送紙機構開始饋紙；步驟二v••持續讀取該位置之影像，並比較前述黑色直 .- - -—·.? ‘二線圖樣的影像信號，直到影像信號變化；、步驟三：根據機架位置設定計時器之預，設值JI開始計、時；步驟四：讀取該位置影像資料，若另侧-之前-述複氣條黑色直線圖樣影像亦產-生〜變北丄則兔羞钎，跳堇步驟六；否則進行下一步驟； .步驟五：檢查計時器值是否超過預設值，若超過通農值則停止送紙並發出警告信號j否則跳回步輝四；步驟六：進行文件掃描。 3.—種掃描器之文件檢測方法，係用於擦氣-自jiL送紙_ 裝置之平台式掃描裝1來自動檢測文件之寬度，.該.自動考、 .紙裝置在掃描視窗上形成對稱於中心之左古複數、倏黑色直線圖樣且文件對稱於中央被送入，其檢測立盖在含下列、 ~' '*~ 步驟：步驟一：將機架移至掃描視窗前緣位/置和前緣，並啟動自動送紙機構開始饋紙；表紙張尺度逋用中國國家橾準（CNS ) A4規格（210X297公釐） -------\~~裝^-- (請先閲讀背面之注意事項再填寫本頁) ^ij I · 、言 .—ft.Printed by A8, B8, C8, and D8 of the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs. 6. Scope of patent application. 1. A document detection method for scanners. It is used to mount. The width and skew of the document. The automatic paper feeding device forms a plurality of black straight lines on the scanning window that are symmetrical to the center and the document is fed symmetrically to the center. The detection method includes the following 0 steps: Step 1: Put the machine The frame is moved to the leading edge of the leading edge position of the scanning window, and the automatic paper feeding mechanism is started to start feeding. Step 2: Continue to read the _ surplus image at that position, and compare the image signal of the aforementioned black straight pattern until the image Signal change; Step 3: Set the timer's default value according to the rack position, and turn on _ ___ ^ " · Start timing; Step 4: Continue to read the image burst at this position and detect the left-right black-line pattern image Signal, if the patterns on both sides are covered by the file, then _ then _ go to step 6; if only one side is covered by the text, go to # next step "Step 5: If the counter value exceeds the aforementioned preset , Skip steps. Nine, otherwise skip back to step four; step six: if only the inner pattern β 1 is obscured by the file, skip the step, otherwise go to the next step; step seven: move the rack to the next detection position , And skip back to step two; step eight: record the position outside the position — 1 with #-as the width of the file, and scan the rack to prepare for scanning; step nine: stop feeding and issue a warning signal. 2.—A scanner's document detection method is used to carry automatic paper feeding (please read the precautions on the back before filling this page) D-I®. This paper size applies the Chinese National Standard (CNS) A4 specification ( 210X297 mm) A8 B8 C8 D8 printed by the Consumers' Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 6. The platform-type scanning device of the patent application device automatically detects the skew of the document. The automatic paper feeding device is symmetrically formed on the scanning window. There are a plurality of black straight lines on the left and right of the center, and the file is sent symmetrically to the center. The detection method includes the following steps:-One ^-Steps: .. Step 1: Move the stick holder one to one sweep-broadcast-see jut edge one position- Leading edge, and start i: ..... * *-L »Move the automatic paper feed mechanism to start feeding; Step 2 v •• Continuously read the image at this position, and compare the aforementioned black straight.--- ·.? 'The image signal of the second line pattern until the image signal changes; Step 3: Set the timer according to the position of the rack, and set the value JI to start counting and time; Step 4: Read the image data at that position. side- Before-the image of the black line pattern of the compound air strip is also produced-raw ~ change the North 丄 is rabbit shame, jump to step six; otherwise go to the next step; step five: check whether the timer value exceeds the preset value, if it exceeds Tongnong value will stop paper feeding and issue a warning signal j, otherwise jump back to Buhui IV; Step 6: Scan the document. 3.—A document detection method of the scanner, which is used for wiping air-self-feeding paper from the _L platform _ device to automatically detect the width of the document. The automatic test and paper device are formed on the scanning window. The left ancient plural number symmetrical to the center, the black straight line pattern, and the document being sent symmetrically to the center. The detection stand cover contains the following, ~ '' * ~ Steps: Step 1: Move the rack to the leading edge of the scanning window / Set the leading edge, and start the automatic paper feeding mechanism to start paper feeding; the paper size is in accordance with China National Standard (CNS) A4 (210X297 mm) ------- \ ~~ 装 ^-(Please (Please read the notes on the back before filling out this page) ^ ij I ·, language. —Ft.

步驟二：持續讀取該位置之影像，並比較前述黑色直線圖樣的影像信號，直到兩側黑色直線圖樣影像均產生信. 號變化；步驟三：若外側黑色直線圖樣亦有產生變化，則進行步驟四，否則進行步称五；步驟四：將機架移動至第下一檢測位置，並跳每步輝一一 · —，步驟五：記錄該位置^:外侧圖後的位置ϋ作„為—艾先& 寬度，並將機架移動到掃描位置，.預備>1始掃描。 --------^-終--： (諳先Ε讀背面之注意事項存填寫本頁) 訂--- 經濟部中央標準局員工消費合作社印装本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐）Step 2: Continue to read the image at this position and compare the image signal of the black straight pattern until the black straight pattern images on both sides produce signal changes. Step 3: If the black straight pattern on the outer side also changes, proceed Step four, otherwise proceed to step five; Step four: Move the rack to the next detection position, and skip each step. One step, step five: Record the position ^: The position after the outside picture — Ai Xian & width, and move the rack to the scanning position. Ready> 1 to start scanning. -------- ^-Final-: (I first read the notes on the back and fill in this Page) Order --- Printed by the Consumers' Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs This paper is sized to the Chinese National Standard (CNS) Α4 (210X297 mm)