1364978 九、發明說明： ' 【發明所屬之技術領域】 : 本發明係有關於一種掃描器，更係關於可自動裁切稿 • 件之掃描影像邊界的方法及掃描器。 【先前技術】 掃描器在進行正式掃描之前，若需要用戶設定其所需 掃描的影像邊界，則此動作稱為裁切（Crop)，若由掃描器 自動識別掃描的影像邊界，則稱之為自動裁切(Auto-Crop)。 鲁 在先前技術中，作為覆壓稿件用之稿件壓具(document cover)的背景顏色為全白色或全黑色，其目的在使圖像分析 時，背景顏色與稿件顏色形成反差，藉以判斷出該稿件之 掃描影像邊界。請參照第1圖，其為習知技術對稿件預掃 描以進行自動裁切之示意圖。習知技術中一般進行掃描之 過程如下：首先，於進行自動裁切之前預掃描一張完整幅 面而低分辨率的預覽圖100 ;其後對其掃描影像邊界102 進行自動裁切，常見之方法是將整個預覽圖1〇〇傳到電腦 進行圖像分析，或者在可攜式掃描器本體上直接進行識 別，然後法只能針對名片之類較容易與稿件壓具的背景顏 色相區別者；最後，當預掃描及自動裁切皆完成後，始能 進行後續正式的掃描動作。 然而，上述習知的自動裁切技術存在以下缺點尚待克 月艮：一、需要先掃描預覽圖，花費了較多的掃描時間，操 作上也較繁瑣。二、對預覽圖進行圖像分析需要較大的計 算量和較高的性能，通常都是在電腦端進行，而一般可攜 6 1364978 式裝備則難以達成。 【發明内容】 • 有鑑於此，本發明係提供一種自動裁切一稿件之掃描 影像邊界的方法，包括提供一稿件壓具，用以覆壓該稿件； 其中該稿件壓具具有平行於一掃描線方向而設置之至少一 第一色帶區及一第二色帶區，該第一、第二色帶區之長度 超出該稿件在平行於該掃描線方向上之長度、掃描該稿件 • 及該稿件壓具，至少取得一第一掃描線資料及/或一第二掃 描線資料，其甲該第一掃描線資料包括該稿件及該第一色 帶區之影像，且該第二掃描線資料包括該稿件及該第二色 帶區之影像；以及對該第一掃描線資料及/或該第二掃描線 資料進行分析以定位該稿件在平行於該掃描線方向上之一 左邊界及一右邊界。 本發明另提供一種可自動裁切一稿件之掃描影像邊 界之掃描器，包括一稿件壓具、一掃描模組及一信號處理 •單元。其中該稿件壓具用以覆壓該稿件；其中該稿件壓具 具有平行於一掃描線方向而設置之至少一第一色帶區及一 第二色帶區，該第一、第二色帶區之長度超出該稿件平行 於該掃描線方向之長度，該掃描桓組用以掃描該稿件及該 稿件壓具，至少取得一第一掃描線資料及/或一第二掃描線 資料；其中該第一掃描線資料包括該稿件及該第一色帶區 之影像，該第二掃描線資料包括該稿件及該第二色帶區之 影像；以及該信號處理單元，用以對該第一掃描線資料及/ 7 或該第二掃栺 —、 描線方向上進行分析以定位該稿件在平行於該掃 炎&」 左邊界及一右邊界。 馬使本發明 下文特舉較佳〜述目的、特徵、和優點能更明顯易懂， 【實施方式只】例並配合所附圖式做詳細說明。 第2八圖夂 掃描影像邊界發明—實施例之可自動裁切稿件之 在另-視角下器示意圖’而第四圖則為該掃描器 為例，4·下思圖。本貫施例以一饋紙式掃插哭 J該饋紙式掃描器2⑼包括一滾輪2。2^咖 204、—信號處理捃，1 知描模組 210 〇 杈組206、一紙張感測器208及—掃描窗 =此貫施例中’該滾輪2〇2之輪軸 X’用以覆壓稿件212於該掃描窗21〇之上向 212沿-垂直方向Y饋送。而該滾輪202在饋 二中依照本發明，具有至少一第一色帶區 色帶區224設置於該滾於々、吞紅工l 乐一 …….滾動面上，圖中僅呈現兩 …一、本技#人士可自行配置複數個色帶區， 不必以此為限。此外，該第—色帶區222及該第二 似之顏色彼此互為高對比色，隨著兩顏色之對比 向，則執行本發明之自動裁切影像邊界的 越: ==該第一色帶區222及該第二、=24 ==: 白色帶區224,然而顏色的選擇 另外，其中本發明之掃描模組對稿 件212以水千方向Χ掃描以產生複數個掃描線資料，是 1::向x即是掃描線方向。 器· 施:中之滾請，除了達到縮小婦描 描及自動裁切稿件掃描::饋达紙張之同時，-併完成掃 說明）。然而，在另—=像邊界等動作（將於下文中詳細 送紙張之傳統平板式；二:列中’本發明可為-不具滾輪饋 稿制具在此則為4=(圖未示）’做為—覆壓紙張之 少兩色帶區，JL該等可依照本發明之精神配置有至 佈，如第兀圖所示。：=!行該水平方向成帶狀分 紙式掃描器200之滾輪 =人士§可輕易了解，饋 時，所達成之效該稿件212進行|送並掃描 式掃描‘=:::第，圖。因此，不論是饋纸 裁切稿件之掃描影像邊界了照本發明之方法自動 第3A圖為铲日〜方法之泮細步驟請見後述。 描影像邊界的方法流程圖明施自動裁切稿件之掃 步請2中，本發明提供;件 圖，於 平板’用以覆壓該稿件於該掃，、’即該滾輪202或該 塵具具有平行該水平方向而 二/中該稿件 度超出該稿件於該水平方向之2使該黑、白色帶區之長 足下-步驟随之需求。:如第2C圖所示，以滿 ==:::=中黑色帶一㈣色 扣及/或取得-第二掃騎^少取得-第-掃描線資料 田線貝枓.234，而其中.該第一掃描 1364978 線資料232包括該稿件212及該黑色帶區222之影像，該 ' 第二掃描線資料234包括該稿件212及該白色帶區224之 • 影像。然而，若欲裁切出更精確之邊界位置，可採用更多 • 之掃描線資料，本實施例僅以該二掃描線資料232、23.4 作說明。最後，於步驟S306中，該信號處理單元206對該 第一掃描線資料232及/或該第二掃描線資料234進行分析 以定位該稿件在該方向之一左邊界及一右邊界。 第3B圖為上述步驟S306中定位該左邊界及該右邊界 • 更詳細之方法流程圖，在步驟S306中，該信號處理單元 206對該第一掃描資料232及/或該第二掃描資料234進行 二值化處理。於步驟S310中，擷取第一掃描線資料232 上各第一掃描點之亮度值及座標值如第4A、4B圖所示， 其中，該第一掃描線資料232包含複數個第一掃描點，沿 該掃描線方向由左至右依序排列，分別具有由小至大不等 之座標值（標示於第4A圖之橫座標）及亮度值（標示於第4A 圖之縱座標）；同樣地，該第二掃描線資料234包含複數個 * 第二掃描點，沿該掃描線方向由左至右依序排列.，分別具 有由小至大不等之座標值（標示於第4B圖之橫座標）及亮度 值（標示於第4B圖之縱座標）。此外，第4A、4B圖中，稿 件212與該黑色帶區222、該白色帶區224之實際左邊界 及實際右邊界分別標示為R1及Rr，界於實際左邊界R1及 實際右邊界Rr間為掃描該稿件212而產生之掃描資料，而 超出實際左邊界R1及實際右邊界Rr者則為掃描該黑色帶 區222或白色帶區224之掃描資料，然而，實際左邊界R1 10 1364978 及實際右邊界Rr為本發明最終欲取得之標的，於進行此步 " 驟S310之際自然尚未得之，是以該等標示僅為方便說明之 ； 用。又，關於亮度值，該黑色帶區222由於其顏色之故， ' 大體上相對於稿件212具有吸收光波之能力，是以亮度值 低，如第4A圖中A、G所示，相反地，該白色帶區224 亦因其顏色之故，大體相對於該稿件212具有反射光波之 能力，是以亮度值高，如點如第4B圖中H、N所示，而該 稿件212為一具有各種顏色之照片，則第一或第二掃描點 • 之亮度值即呈現不規則變化，如第4A圖中B〜E、第4B圖 中J〜L所示。 於步驟S312中，該信號處理單元206預先設定一第一 臨界值Be，其中該第一臨界值Be為亮度值，熟悉本技藝 人士應將其值設定為約略高於該黑色帶區222之亮度值； 同樣地，該信號處理單元206亦預先設定一第二臨界值 We，其中該第二臨界值We為亮度值，熟悉本技藝人士應 將其值設定為約略低於該白色帶區224之亮度值。同樣， 該第一臨界值Be和第二臨界值We也可通過分析第一、第 二掃描點中在一固定位置（該掃描模組204具有一最大掃 描範圍’而該固定位置為超過該隶大掃描範圍之色帶區） 上的該等掃描點的亮度值而得。其分析方法可將該等掃描 點的亮度值予以平均或採用其他習知的數據分析方法。此 外，另一方法為在該掃描器200上尚無稿件時，即分別掃 描黑色帶區222和白色帶區224，並將掃描所得之影像的 亮度值予以分析，以得到該第一臨界值Be和該第二臨界值 11 /δ =最後將其儲存到信號處理單元2〇6以留作後續使用。 ’、刀法亦可採用平均或其他習知的數據分析方法。 播二驟S3H中’該信號處理單元2〇6分別將該第_、 描點進行二值化.，詳細地說 =該第一臨界值Bc#皆二值化為一高值二中: 及E分別轉換成…，，且將該等第一掃 免度值低於該第-臨界值B :描點中 4A圖中，A、B、r 者白一值化為一低值，如第 F及〇分別轉換成A，、B，、c，、F, 俏w ‘地’該荨第二掃描點中亮度值高於該第二臨界 及換成m，、…，，且將該等第= 中冗度值低於該第二臨界值w 值’如第43圖中]Μ分別轉換成，。化為-低 相耸值化後，凡相鄰之兩點分別為高值和低值而互不 辯之笛，稱其為發生突變。於步驟⑶6中，將所有發生突1364978 IX. Description of the invention: 'Technical field to which the invention pertains>> The present invention relates to a scanner, and more to a method and a scanner for automatically cutting a scanned image boundary of a document. [Prior Art] Before the scanner performs a formal scan, if the user needs to set the boundary of the image to be scanned, the action is called Crop. If the scanner automatically recognizes the scanned image boundary, it is called Auto-Crop. In the prior art, the background color of the document cover used as the overlying manuscript is all white or all black, and the purpose is to make the contrast between the background color and the color of the manuscript when the image is analyzed, thereby judging the The scanned image boundary of the manuscript. Please refer to Fig. 1, which is a schematic diagram of a prior art pre-scanning of a manuscript for automatic cutting. The general scanning process in the prior art is as follows: First, pre-scanning a full-frame and low-resolution preview image 100 before performing automatic cutting; thereafter, automatically cutting the scanned image boundary 102, a common method Is to transfer the entire preview image 1 to the computer for image analysis, or directly on the portable scanner body, and then the method can only be distinguished from the background color of the manuscript presser for business cards and the like; Finally, after the pre-scan and automatic cutting are completed, the subsequent formal scanning action can be performed. However, the above-mentioned conventional automatic cutting technology has the following shortcomings: 1. It is necessary to scan the preview image first, which takes a lot of scanning time and is cumbersome in operation. Second, the image analysis of the preview image requires a large calculation amount and high performance, usually performed on the computer side, and it is difficult to achieve the general portable 6 1364978 type equipment. SUMMARY OF THE INVENTION In view of the above, the present invention provides a method of automatically cutting a scanned image boundary of a manuscript, comprising providing a manuscript presser for overlaying the manuscript; wherein the manuscript press has a scan parallel to a scan Having at least one first ribbon zone and a second ribbon zone disposed in a line direction, the length of the first and second ribbon zones exceeding a length of the document in a direction parallel to the scan line, scanning the document; The manuscript presser obtains at least a first scan line data and/or a second scan line data, wherein the first scan line data includes the manuscript and the image of the first ribbon area, and the second scan line The data includes the image of the manuscript and the second ribbon region; and analyzing the first scan line data and/or the second scan line data to position the left edge of the document in a direction parallel to the scan line and A right border. The invention further provides a scanner capable of automatically cutting a scanned image boundary of a manuscript, comprising a manuscript presser, a scanning module and a signal processing unit. Wherein the manuscript presser is used to cover the manuscript; wherein the manuscript press has at least one first ribbon zone and a second ribbon zone disposed parallel to a scan line direction, the first and second ribbons The length of the area exceeds the length of the document parallel to the direction of the scan line, and the scan group is configured to scan the document and the presser to obtain at least a first scan line data and/or a second scan line data; The first scan line data includes an image of the manuscript and the first ribbon region, the second scan line data includes an image of the manuscript and the second ribbon region, and the signal processing unit is configured to perform the first scan Line data and / 7 or the second broom - analysis in the direction of the line to position the manuscript parallel to the left and right borders of the Sweep & DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in more detail below with reference to the accompanying drawings. The second eight figure 扫描 scan image boundary invention - the embodiment can automatically cut the manuscript in the other - viewfinder diagram and the fourth picture is the scanner as an example, 4 · think. The present embodiment uses a paper-feeding sweeping crying. The paper-feeding scanner 2 (9) includes a roller 2. 2^ coffee 204, - signal processing, 1 scanning module 210, group 206, a paper sensing The 208 and the scanning window=the wheel axis X' of the roller 2〇2 in this embodiment is used to feed the manuscript 212 to the 212 in the vertical direction Y above the scanning window 21〇. In addition, the roller 202 is provided in the feed two according to the present invention, and has at least one first ribbon zone ribbon zone 224 disposed on the rolling surface of the roll, the swallowing machine, and the only one of the two... 1. This technology # person can configure a plurality of ribbon zones by themselves, without being limited to this. In addition, the first ribbon region 222 and the second color are mutually high contrast colors. As the two colors are contrasted, the automatic cutting of the image boundary of the present invention is performed: == the first ribbon The area 222 and the second, =24 ==: white strip 224, however, the color is selected. In addition, the scanning module of the present invention scans the document 212 in the direction of the water to generate a plurality of scan line data, which is 1: : To x is the direction of the scan line.器·施: In the middle of the rolling, in addition to the reduction of the woman's drawing and automatic cutting of the manuscript scan:: while feeding the paper, - and complete the sweep instructions). However, in the other -= like borders and other actions (the traditional flat type of paper will be sent in detail below; two: in the column 'the invention can be - no roller feed tool is here 4 = (not shown) 'Being as a two-color zone for overprinting paper, JL can be configured to the cloth according to the spirit of the present invention, as shown in the figure.: =! This horizontal direction is a strip-shaped paper-scanner 200 wheel = person § can easily understand, feed time, the effect achieved by the manuscript 212 | send and scan scan '=::: first, figure. Therefore, regardless of the scan image boundary of the paper-cut manuscript According to the method of the present invention, FIG. 3A is a detailed step of the shovel day-to-method. Please refer to the following. The method of describing the boundary of the image is shown in the following paragraph 2, which is provided by the present invention; a flat plate 'for overlaying the manuscript on the sweep, 'that is, the roller 202 or the duster has a parallel horizontal direction and the second/middle of the manuscript exceeds the horizontal direction of the manuscript in the horizontal direction to make the black and white band The long steps - the steps are followed by the demand: as shown in Figure 2C, with black = one in the full ==:::= (four) Buckle and/or obtain - second sweep ride ^ less acquisition - first scan line data line Bellow. 234, and wherein the first scan 1364978 line data 232 includes the image of the manuscript 212 and the black strip 222, The 'second scan line data 234 includes the image of the manuscript 212 and the white strip 224. However, if a more precise boundary position is to be cropped, more scan line data can be used, and this embodiment only uses The second scan line data 232, 23.4 are described. Finally, in step S306, the signal processing unit 206 analyzes the first scan line data 232 and/or the second scan line data 234 to locate the document in the direction. One of the left boundary and the right boundary. FIG. 3B is a flowchart of a method for positioning the left boundary and the right boundary in the above step S306. In step S306, the signal processing unit 206 selects the first scan data 232. And/or the second scan data 234 is binarized. In step S310, the luminance values and coordinate values of the first scan points on the first scan line data 232 are captured as shown in FIGS. 4A and 4B, wherein The first scan line data 232 includes A plurality of first scanning points are sequentially arranged from left to right along the direction of the scanning line, and have coordinate values ranging from small to large (marked in the horizontal coordinate of Figure 4A) and brightness values (marked in Figure 4A) Similarly, the second scan line data 234 includes a plurality of * second scan points, which are sequentially arranged from left to right along the scan line direction, and have coordinate values ranging from small to large ( The abscissa shown in Fig. 4B and the luminance value (indicated in the ordinate of Fig. 4B). Further, in Figs. 4A and 4B, the actual left border of the manuscript 212 and the black strip 222, the white strip 224. And the actual right boundary is respectively denoted as R1 and Rr, and the scan data generated by scanning the manuscript 212 between the actual left boundary R1 and the actual right boundary Rr is displayed, and the scan is performed beyond the actual left boundary R1 and the actual right boundary Rr. The scanned data of the black strip 222 or the white strip 224, however, the actual left border R1 10 1364978 and the actual right border Rr are the final objects to be obtained by the invention, and it is naturally not available at the time of this step & S310. It is only convenient to say that these signs are ; Use. Further, regarding the luminance value, the black strip region 222 has a function of absorbing light waves substantially with respect to the manuscript 212 due to its color, and is low in luminance value, as shown by A and G in FIG. 4A, and conversely, The white strip 224 is also generally capable of reflecting light waves relative to the document 212 due to its color, and has a high luminance value, as indicated by H and N in FIG. 4B, and the document 212 has a For photographs of various colors, the brightness values of the first or second scanning points are irregularly changed, as shown by B to E in Fig. 4A and J to L in Fig. 4B. In step S312, the signal processing unit 206 presets a first threshold value Be, wherein the first threshold value Be is a brightness value, and those skilled in the art should set the value to be slightly higher than the brightness of the black band 222. Similarly, the signal processing unit 206 also presets a second threshold We, wherein the second threshold We is a luminance value, and those skilled in the art should set the value to be slightly lower than the white band 224. The brightness value. Similarly, the first threshold value Be and the second threshold value We may also be analyzed by analyzing the first and second scanning points at a fixed position (the scanning module 204 has a maximum scanning range) and the fixed position is greater than the The brightness value of the scanning points on the ribbon area of the large scanning range is obtained. The analysis method can average the brightness values of the scanning points or adopt other conventional data analysis methods. In addition, another method is to scan the black strip area 222 and the white strip area 224 when there is no manuscript on the scanner 200, and analyze the brightness value of the scanned image to obtain the first critical value Be. And the second threshold 11 / δ = finally stored to the signal processing unit 2 〇 6 for later use. The knife method can also use average or other conventional data analysis methods. In the second step S3H, the signal processing unit 2〇6 binarizes the _th and sigma respectively. In detail, the first threshold Bc# is binarized into a high value two: E is converted to ..., respectively, and the first sweep value is lower than the first critical value B: in the 4A picture in the drawing, A, B, and r are whitened to a low value, such as F and 〇 are converted into A, B, c, and F, respectively, and the brightness value of the second scan point is higher than the second threshold and replaced by m, ..., and The first = medium redundancy value is lower than the second critical value w value 'as in Fig. 43' Μ is converted to, respectively. After being converted to a low phase, the two adjacent points are high and low, respectively, and the flute is said to be a mutation. In step (3) 6, all occurrences
-掃描點（如C，、D，、E，及F，）中座標值最小者（即c,) A才示值定為一第一左邊界B 描點（如C，、d,、m,、士 ,,知王大欠之弟一掃 £及F)中座標值最大者(F，)之座標值定 點二ΓΓ;，;同樣地’將所有發生突變之第二掃描 定左邊座標值最小者(即Γ)之座標值 了 、第^左邊界W卜將所有發生突變之第二婦描點(如 K、L及Μ,)中座標值最大者(Μ，)之座標值定為一 弟一右邊界Wr。 於步驟S318中，進而將該第一左邊界B丨與該第二左 12 =邊^中最#左者(在本實施例中為第二左邊界定為 最土二2及將該弟—右邊界&與該第二右邊界Wr中 罪者定為該右邊界(在本實施例中 同於該第-士遙R犯、， 矛石遺界Br等 4A mnp^ J] Γ。承上所述，本實施例中，觀查第 約略圖=現’雖然該第一右邊界Br及該第二右邊界％ 際右邊界以、該第二左邊界W1約略等同於- The scan point (such as C, D, E, and F,) has the smallest coordinate value (ie c,) A. The value is defined as a first left boundary B (such as C, d, m ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, The coordinate value of the person (ie, Γ), and the coordinate value of the largest coordinate value (Μ,) of the second woman's drawing point (such as K, L, and Μ,) Brother a right border Wr. In step S318, the first left boundary B丨 and the second left 12=edge ^ are the most left (in the present embodiment, the second left is defined as the most common two 2 and the younger brother - right The sinner in the boundary & and the second right border Wr is defined as the right border (in the present embodiment, the same as the first Shirao R, the sacred stone border, etc. 4A mnp^J] 承. In the present embodiment, the approximated graph = now 'although the first right border Br and the second right border % right border are equal to the second left border W1
左邊界B1卻與該實際右邊界 甚夕°是以’當_取之掃描資料越多，自然裁切 =邊界越接近實際情況，熟悉本技藝人士當可:據 本發明就此點自行設計改良。The left boundary B1 is the same as the actual right boundary. The more the data is scanned, the more the data is cut. The closer the boundary is to the actual situation, the person skilled in the art can: according to the invention, the design is improved.
综上所述，依照步驟S3〇2〜S3〇6、S3】〇〜S3i8後，該 饋紙式掃描器可自動裁切出稿件之掃描影像之左邊^ 及界’然而’完整之自動裁切尚包括界定出上邊界及 下邊界i此’參照第2A、2BW，本發明之馈紙式掃描 器又包括-紙張感測器2〇8。當紙張感測器細—端發射 光線二如果有稿件經過表面，反射的光線被另H紙張 感勤（®未示）接收，再配合稿件的反射信號及計算馬達 的走步長度，就可以確定掃描稿件的上邊界及下邊界。在 本實施例中，當該紙張感應器208感應到該稿件2^上緣 時，將該稿件212上緣在該垂直方向Bji之座以為該上 邊界，以及當該紙張感應器208感應到該稿件212下緣時， 則將該稿件212下緣在該垂直方向B上之座標定為該下邊 至此，本發明自動裁切稿件之掃描影像邊界的方法及 13 1364978 裝置已悉數揭露。由於本發明在稿件壓具上並非單一顏 ' 色，是以稿件邊緣與稿件壓具顏色相近的可能性大幅降 - 低，可達到較先前技術更為精確之裁切效果，此外，由於 本發明不需於實際掃描前對稿件先行預掃描，且進行自動 裁切所占用系統的運算資源甚小，使本發明之掃描器更適 宜應用為一可攜式裝備。 雖然本發明以前述之較佳實施例揭露如上，然其並非 用以限定本發明。本發明所屬技術領域中具有通常知識 • 者，在不脫離本發明之精神和範圍内，當可做些許之更動 與潤飾。因此本發明之保護範圍當視後附之申請專利範圍 所界定者為準。 14 1364978 【圖式簡單說明】 ' 第1圖為習知技術對稿件預掃描以進行自動裁切之示 • 意圖。. 第2A圖為依照本發明一實施例之饋紙式掃描器正視 圖。 第2 B圖為依照本發明一實施例之饋紙式掃描器側視 圖。 第2C圖為本發明之掃描器進行自動裁切稿件時之等 籲效示意圖。 第3A圖為本發明自動裁切稿件之掃描影像邊界之方 法流程圖。 第3B圖為第3A圖之步驟S306的詳細方法流程圖。 第4A圖為第3A圖之步驟S306對應於第一掃描點之 示意圖。 第4B圖為第3A圖之步驟S306對應於第二掃描點之 示意圖。 【主要元件符號說明】 202〜滾輪， 204~掃描模組’ 206〜信號處理單元， 208〜紙張感測器， 210〜掃描窗’ 222〜黑色帶區， 224〜白色帶區， 15 1364978 232〜第一掃描資料， ' 234〜第二掃描資料， : A、B〜G〜第一掃描點， A’、B’〜G’〜二值化後之第一掃描點.， Η、I〜N〜第二掃描點， Η’、Γ〜Ν’〜二值化後之第二掃描點， S302〜S306〜步驟， S310〜S18步驟， • X〜水平方向， Υ〜垂直方向。In summary, according to steps S3〇2~S3〇6, S3]〇~S3i8, the paper-feeding scanner can automatically cut the left side of the scanned image of the manuscript and the boundary 'but' complete automatic cutting It is also included that the upper and lower boundaries are defined. Referring to FIGS. 2A and 2BW, the sheet-fed scanner of the present invention further includes a paper sensor 2〇8. When the paper sensor emits light at the fine end, if the document passes over the surface, the reflected light is received by another H paper (® not shown), and then the reflected signal of the document and the calculated walking length of the motor can be determined. Scan the top and bottom borders of the document. In the embodiment, when the paper sensor 208 senses the upper edge of the document 2, the upper edge of the document 212 in the vertical direction Bji is regarded as the upper boundary, and when the paper sensor 208 senses the When the lower edge of the document 212 is located, the coordinate of the lower edge of the document 212 in the vertical direction B is determined as the lower side. The method for automatically scanning the image boundary of the document and the 13 1364978 device have been fully disclosed. Since the present invention is not a single color on the manuscript press, the possibility that the edge of the document is close to the color of the manuscript press is greatly reduced-low, and a more precise cutting effect than the prior art can be achieved, and further, the present invention The pre-scanning of the manuscript is not required before the actual scanning, and the computing resources of the system occupied by the automatic cutting are very small, so that the scanner of the present invention is more suitable for being used as a portable device. While the invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention. It is within the spirit and scope of the invention to make some modifications and refinements. Therefore, the scope of the invention is defined by the scope of the appended claims. 14 1364978 [Simple description of the diagram] 'The first figure shows the pre-scanning of the manuscript for automatic cutting. Fig. 2A is a front elevational view of a sheet-fed scanner in accordance with an embodiment of the present invention. Figure 2B is a side elevational view of a sheet-fed scanner in accordance with an embodiment of the present invention. Fig. 2C is a schematic view showing the effect of the scanner of the present invention for automatically cutting a document. Fig. 3A is a flow chart showing the method of automatically cutting a document boundary of a manuscript according to the present invention. Figure 3B is a detailed method flow diagram of step S306 of Figure 3A. Fig. 4A is a schematic diagram of step S306 of Fig. 3A corresponding to the first scanning point. Fig. 4B is a schematic diagram of step S306 of Fig. 3A corresponding to the second scanning point. [Main component symbol description] 202~wheel, 204~scanning module '206~signal processing unit, 208~paper sensor, 210~scan window' 222~black strip, 224~white strip, 15 1364978 232~ The first scan data, '234~ second scan data, : A, B~G~ first scan point, A', B'~G'~ the first scan point after binarization., Η, I~N ~ second scan point, Η ', Γ ~ Ν ' ~ after binarization of the second scan point, S302 ~ S306 ~ step, S310 ~ S18 steps, • X ~ horizontal direction, Υ ~ vertical direction.