TWI644163B - Light sensing apparatus having inclined background sheet and light sensing method using the same - Google Patents
Light sensing apparatus having inclined background sheet and light sensing method using the same Download PDFInfo
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- TWI644163B TWI644163B TW106137708A TW106137708A TWI644163B TW I644163 B TWI644163 B TW I644163B TW 106137708 A TW106137708 A TW 106137708A TW 106137708 A TW106137708 A TW 106137708A TW I644163 B TWI644163 B TW I644163B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
- H04N1/00729—Detection means
- H04N1/00734—Optical detectors
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
- H04N1/00763—Action taken as a result of detection
- H04N1/00774—Adjusting or controlling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/024—Details of scanning heads ; Means for illuminating the original
- H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
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Abstract
一種感光設備包含一走紙通道、一第一感光組件以及一第一背景片。走紙通道具有一掃描窗。第一感光組件設置於掃描窗的一第一側,並朝向掃描窗發出一第一掃描光線。第一背景片設置於掃描窗的一第二側,並具有一第一反射面,第一反射面將通過掃描窗的第一掃描光線反射穿過掃描窗而回到第一感光組件。第一背景片的第一反射面與掃描窗為非平行設置。藉此,可達成感光組件對亮度校正以及邊界偵測的效果。 A photosensitive device includes a paper feed channel, a first photosensitive component, and a first background film. The paper path has a scanning window. The first photosensitive component is disposed on a first side of the scanning window and emits a first scanning light toward the scanning window. The first background film is disposed on a second side of the scanning window and has a first reflecting surface. The first reflecting surface reflects the first scanning light passing through the scanning window through the scanning window and returns to the first photosensitive component. The first reflection surface of the first background film and the scanning window are arranged non-parallel. Thereby, the effects of the light-sensitive component on brightness correction and boundary detection can be achieved.
Description
本發明是有關於一種感光設備及其感光方法,且特別是有關於一種具有傾斜背景片的感光設備及其感光方法。 The invention relates to a photosensitive device and a photosensitive method thereof, and more particularly to a photosensitive device with a tilted background film and a photosensitive method thereof.
一般而言,饋紙式掃描器的傳統感光設備中,因為要進行標準白的校正,所以需要有一白色的背景片來讓感光模組進行校正。除此之外,大部分的文件都是具有白色背景,因此,感光模組感測到的白色背景通常與背景片的亮度差異不大,無法讓感光設備進行尋邊的動作,此舉不利於感光組件對亮度校正(calibration)及自動裁邊(auto-crop),所以會使用黑色背景片來協助尋邊的動作。反之,黑色背景片不能用以做感光組件對亮度校正的動作,故需要白色背景片來完成感光組件對亮度校正。所以,為了完成感光組件對亮度校正及自動裁邊的動作,會需要兩片背景片的設置,機構設計上也比較複雜。 Generally speaking, in the conventional photosensitive device of the paper-fed scanner, since a standard white calibration is performed, a white background film is required for the photosensitive module to perform calibration. In addition, most documents have a white background. Therefore, the brightness of the white background detected by the photosensitive module is usually not much different from the brightness of the background film. The light-sensitive component calibrates brightness and auto-crop, so a black background film is used to assist the edge-finding action. Conversely, the black background film cannot be used to perform the brightness correction of the photosensitive component, so a white background film is required to complete the brightness correction of the photosensitive component. Therefore, in order to complete the brightness correction and automatic edge trimming of the photosensitive component, the setting of two background films is required, and the mechanism design is also relatively complicated.
傳統技術中,為了同時有黑色背景片與白色背景片,US7441704將黑色背景片與白色背景片設置於同一個軸心上:當啟動校正時,白色背景片面對視窗進而進行感光組件對亮度校 正;當對紙張進行掃描時,利用同軸旋轉的方式使黑色背景片面對視窗,如此感應元件便可以明確的辨識黑色背景片與紙張之間的邊界,進而進行自動裁邊。另一個傳統技術方案中,藉由一片灰色背景片來達到白色背景片的感光組件對亮度校正與黑色背景片的自動裁邊;然而,灰色背景片的顏色是調和而來的,所以在製備上不容易得到均勻的顏色,進而導致感光組件對亮度校正的誤差。 In the traditional technology, in order to have both a black background film and a white background film, US7441704 sets the black background film and the white background film on the same axis: when the calibration is started, the white background film faces the window and then the brightness calibration of the photosensitive component Positive; when the paper is scanned, the black background film is made to face the window by using the coaxial rotation method, so that the sensor element can clearly identify the boundary between the black background film and the paper, and then perform automatic trimming. In another traditional technical solution, a gray background film is used to achieve the brightness correction of the white background film and the automatic edge trimming of the black background film; however, the color of the gray background film is harmonized, so in preparation It is not easy to obtain a uniform color, which leads to errors in the brightness correction of the photosensitive component.
因此,如何提供一種能進行均勻背景顏色且穩定的感光組件對亮度校正(calibration)及自動裁邊(auto-crop)的感光設備,實為本案所欲解決的問題。 Therefore, how to provide a light-sensitive device capable of performing uniform calibration and brightness correction and auto-crop of a light-sensitive component with a uniform background color is a problem to be solved in this case.
本發明的一個目的是提供一種具有傾斜背景片的感光設備及其感光方法,用來提供均勻背景顏色且穩定的感光組件對亮度校正及自動裁邊的功能。 An object of the present invention is to provide a photosensitive device having a tilted background film and a photosensitive method thereof, which are used to provide a function of uniformly correcting the brightness and automatic edge trimming of a stable photosensitive component with a uniform background color.
為達上述目的,本發明提供一種感光設備,包含一走紙通道、一第一感光組件以及一第一背景片。走紙通道具有一掃描窗。第一感光組件設置於掃描窗的一第一側,並朝向掃描窗發出一第一掃描光線。第一背景片設置於掃描窗的一第二側,並具有一第一反射面,第一反射面將通過掃描窗的第一掃描光線反射穿過掃描窗而回到第一感光組件。第一背景片的第一反射面與掃描窗為非平行設置。 To achieve the above object, the present invention provides a photosensitive device including a paper feed channel, a first photosensitive component, and a first background film. The paper path has a scanning window. The first photosensitive component is disposed on a first side of the scanning window and emits a first scanning light toward the scanning window. The first background film is disposed on a second side of the scanning window and has a first reflecting surface. The first reflecting surface reflects the first scanning light passing through the scanning window through the scanning window and returns to the first photosensitive component. The first reflection surface of the first background film and the scanning window are arranged non-parallel.
上述感光設備可以更包含一第二感光組件以及一第二背景片。第二感光組件設置於掃描窗的第二側,並朝向掃描窗發出一第二掃描光線。第二背景片設置於掃描窗的第一側,並具有一第二反射面,第二反射面將通過掃描窗的第二掃描光線反射穿過掃 描窗而回到第二感光組件。第二背景片的第二反射面與掃描窗為非平行設置。 The above-mentioned photosensitive device may further include a second photosensitive component and a second background film. The second photosensitive element is disposed on the second side of the scanning window and emits a second scanning light toward the scanning window. The second background film is disposed on the first side of the scanning window and has a second reflecting surface. The second reflecting surface reflects the second scanning light passing through the scanning window and passes through the scanning window. Trace the window and return to the second photosensitive unit. The second reflecting surface of the second background film and the scanning window are arranged non-parallel.
於上述感光設備中,當一資料媒體沿著走紙通道被感光設備的一饋送機構饋送通過掃描窗時,第一掃描光線的一第一部分被資料媒體的一第一面反射回到第一感光組件,而產生一第一掃描信號,第一掃描光線的一第二部分被第一背景片反射回到第一感光組件,而產生一第一背景信號。 In the above-mentioned photosensitive device, when a data medium is fed through a scanning window by a feeding mechanism of the photosensitive device along the paper path, a first part of the first scanning light is reflected back to the first photosensitive by a first surface of the data medium. The component generates a first scanning signal, and a second part of the first scanning light is reflected back to the first photosensitive component by the first background sheet to generate a first background signal.
本發明亦提供一種感光方法,應用於上述感光設備中,感光方法包含以下步驟:饋送資料媒體進入走紙通道;依據下述步驟產生第一掃描信號及第一背景信號的一混合信號:於資料媒體通過掃描窗以前,使第一感光組件感測第一掃描光線的第二部分;於資料媒體通過掃描窗時,使第一感光組件感測第一掃描光線的第一部分及第二部分;及於資料媒體通過掃描窗後,使第一感光組件感測第一掃描光線的第一部分;以及依據第一背景信號的特性從混合信號中分離出第一掃描信號。 The present invention also provides a light sensing method, which is applied to the above-mentioned light sensing device. The light sensing method includes the following steps: feeding a data medium into a paper path; and generating a mixed signal of a first scanning signal and a first background signal according to the following steps: Before the medium passes through the scanning window, the first photosensitive component senses the second portion of the first scanning light; when the data medium passes through the scanning window, the first photosensitive component senses the first portion and the second portion of the first scanning light; and After the data medium passes through the scanning window, the first photosensitive component is caused to sense the first part of the first scanning light; and the first scanning signal is separated from the mixed signal according to the characteristics of the first background signal.
藉由上述的感光設備,可以利用傾斜的背景片來提供均勻的灰階的背景而與資料媒體的白色背景有所區別,達成感光組件對亮度校正及自動裁切的功能。再者,透過驅動機構可以驅動背景片旋轉至水平狀態,以提供亮度校正的效果。此外,透過驅動機構可以驅動背景片旋轉至其他傾斜角度,以提供不同灰階度的背景效果。上述特徵可以用單一傾斜背景片來完成,結構簡單且效果顯著,可為饋紙式掃描器提供一種有效的背景偵測的效果。 With the above-mentioned photosensitive device, a tilted background film can be used to provide a uniform grayscale background, which is different from the white background of the data medium, and achieves the functions of the photosensitive component to correct the brightness and automatically cut. In addition, the driving mechanism can drive the background film to rotate to a horizontal state to provide the effect of brightness correction. In addition, the driving mechanism can drive the background film to rotate to other tilt angles to provide different grayscale background effects. The above features can be completed with a single oblique background film, with a simple structure and significant effects, which can provide an effective background detection effect for a paper-fed scanner.
為讓本發明之上述內容能更明顯易懂,下文特舉較佳實施例,並配合所附圖式,作詳細說明如下。 In order to make the above content of the present invention more comprehensible, the following describes the preferred embodiments in detail with the accompanying drawings, as follows.
A‧‧‧尺寸 A‧‧‧ size
A1‧‧‧第一角度 A1‧‧‧First angle
A2‧‧‧第二角度 A2‧‧‧ second angle
B‧‧‧尺寸 B‧‧‧ size
BD‧‧‧邊界 BD‧‧‧ border
IB‧‧‧影像 IB‧‧‧Image
IM‧‧‧影像 IM‧‧‧Image
L1‧‧‧第一掃描光線 L1‧‧‧First scanning light
L2‧‧‧第二掃描光線 L2‧‧‧Second scanning light
M‧‧‧資料媒體 M‧‧‧ Information Media
M1‧‧‧第一面 M1‧‧‧First side
M2‧‧‧第二面 M2‧‧‧Second Side
R1、R2、R3‧‧‧反射光 R1, R2, R3‧‧‧ reflected light
S1‧‧‧第一掃描信號 S1‧‧‧First scan signal
S2‧‧‧第一背景信號 S2‧‧‧First background signal
S3‧‧‧第二掃描信號 S3‧‧‧Second scan signal
S4‧‧‧第二背景信號 S4‧‧‧Second background signal
S5‧‧‧第一校正信號 S5‧‧‧first correction signal
S6‧‧‧第二校正信號 S6‧‧‧Second calibration signal
ST1至ST3‧‧‧步驟 ST1 to ST3 ‧‧‧ steps
1‧‧‧感光設備 1‧‧‧ Photosensitive equipment
3‧‧‧饋送機構 3‧‧‧Feeding mechanism
3A、3B、3C、3D‧‧‧饋送滾輪 3A, 3B, 3C, 3D‧‧‧Feed roller
10‧‧‧走紙通道 10‧‧‧paper path
11‧‧‧掃描窗 11‧‧‧scan window
20‧‧‧第一感光組件 20‧‧‧The first photosensitive component
21‧‧‧第一發光元件 21‧‧‧first light emitting element
21A‧‧‧光源 21A‧‧‧Light source
21B‧‧‧導光柱 21B‧‧‧light guide
22‧‧‧第一感應元件 22‧‧‧first sensor
22A‧‧‧透鏡陣列 22A‧‧‧lens array
22B‧‧‧感測元陣列 22B‧‧‧Sense Element Array
30‧‧‧第一背景片 30‧‧‧ the first background film
30A‧‧‧第一反射面 30A‧‧‧First reflecting surface
40‧‧‧第一透光基板 40‧‧‧The first transparent substrate
50‧‧‧第二透光基板 50‧‧‧Second transparent substrate
60‧‧‧第二感光組件 60‧‧‧Second photosensitive element
61‧‧‧第二發光元件 61‧‧‧Second light emitting element
61A‧‧‧光源 61A‧‧‧Light source
61B‧‧‧導光柱 61B‧‧‧light guide
62‧‧‧第二感應元件 62‧‧‧Second sensing element
62A‧‧‧透鏡陣列 62A‧‧‧lens array
62B‧‧‧感測元陣列 62B‧‧‧Sense Element Array
70‧‧‧第二背景片 70‧‧‧ Second background film
70A‧‧‧第二反射面 70A‧‧‧Second reflective surface
80‧‧‧第一驅動機構 80‧‧‧first drive mechanism
85‧‧‧第二驅動機構 85‧‧‧second drive mechanism
90‧‧‧處理器 90‧‧‧ processor
圖1與圖2顯示依據本發明較佳實施例的感光設備的兩種狀態的示意圖。 1 and 2 are schematic views showing two states of a photosensitive device according to a preferred embodiment of the present invention.
圖3顯示發光元件與感應元件的示意圖。 FIG. 3 shows a schematic diagram of a light emitting element and a sensing element.
圖4A與圖4B分別顯示對應於圖1與圖2的光路圖的一個例子。 4A and 4B show an example of the optical path diagrams corresponding to FIGS. 1 and 2, respectively.
圖5A與圖5B分別顯示對應於圖1與圖2的光路圖的另一例子。 5A and 5B show another example of the optical path diagrams corresponding to FIGS. 1 and 2, respectively.
圖6顯示自動裁減的示意圖。 Figure 6 shows a schematic diagram of automatic cropping.
圖7顯示歪斜校正的示意圖。 FIG. 7 shows a schematic diagram of skew correction.
圖8顯示依據本發明較佳實施例的感光方法的流程圖。 FIG. 8 shows a flowchart of a light sensing method according to a preferred embodiment of the present invention.
線性影像感測器(Liner Image Sensor)是由多數個感應器所構成,這些感應器排列成一直線,間距一致,對反射光的強弱產生不同電壓,市面上有電荷耦合元件影像感測器(Charge-coupled device(CCD)type image sensor)、接觸式影像感測器(Contact Image Sensor,CIS)兩種產品,尤其是CIS因價格低廉而大量使用在掃描器上。本發明的實施例可以應用於上述兩種感測器,配合傾斜的背景片,可以提供灰階的背景而與資料媒體的白色背景有所區別,以利後續的感光組件對亮度校正及自動裁邊的執行。 The Linear Image Sensor is composed of a number of sensors. These sensors are arranged in a straight line with the same spacing, and generate different voltages on the intensity of the reflected light. There are charge-coupled element image sensors on the market. -coupled device (CCD) type image sensor) and contact image sensor (CIS). Especially CIS is widely used in scanners because of its low price. The embodiments of the present invention can be applied to the above-mentioned two types of sensors. Together with the inclined background film, it can provide a gray-scale background and be different from the white background of the data medium, so as to facilitate subsequent light-sensitive components for brightness correction and automatic cropping. Side execution.
圖1與圖2顯示依據本發明較佳實施例的感光設備的兩種狀態的示意圖。如圖1與圖2所示,本實施例的感光設備1譬如是一台饋紙式掃描器,在饋送資料媒體的同時擷取資料媒體的影像。雖然圖中以雙面掃描器來實施,但是並非意圖將本發明限制於此,因為單面掃描器也可以達成本發明的效果。感光設備1包含 一走紙通道10、一第一感光組件20以及一第一背景片30。如此,即可實施單面掃描的效果。為了執行雙面掃描,感光設備1可以更包含一第二感光組件60以及一第二背景片70。 1 and 2 are schematic views showing two states of a photosensitive device according to a preferred embodiment of the present invention. As shown in FIG. 1 and FIG. 2, the photosensitive device 1 of this embodiment is, for example, a paper-feed scanner, which captures an image of a data medium while feeding the data medium. Although the figure is implemented by a double-sided scanner, it is not intended to limit the invention to this, because a single-sided scanner can also achieve the effect of the invention. Photosensitive device 1 contains A paper path 10, a first photosensitive component 20 and a first background sheet 30. In this way, the effect of single-sided scanning can be implemented. In order to perform double-sided scanning, the photosensitive device 1 may further include a second photosensitive element 60 and a second background film 70.
走紙通道10具有一掃描窗11。第一感光組件20設置於掃描窗11的一第一側,並朝向掃描窗11發出一第一掃描光線L1。第二感光組件60設置於掃描窗11的一第二側,並朝向掃描窗11發出一第二掃描光線L2。 The paper path 10 has a scanning window 11. The first photosensitive component 20 is disposed on a first side of the scanning window 11 and emits a first scanning light L1 toward the scanning window 11. The second photosensitive element 60 is disposed on a second side of the scanning window 11 and emits a second scanning light L2 toward the scanning window 11.
第一背景片30設置於掃描窗11的第二側,並具有一第一反射面30A,以將通過掃描窗11的第一掃描光線L1反射穿過掃描窗11而回到第一感光組件20。第二背景片70設置於掃描窗11的第一側,並具有一第二反射面70A,以將通過掃描窗11的第二掃描光線L2反射穿過掃描窗11而回到第二感光組件60。第一側與第二側係為相背對的側,於圖1中是以上側與下側來作說明。亦即,第一背景片30與第一感光組件20的連接線係與掃描窗11相交。 The first background film 30 is disposed on the second side of the scanning window 11 and has a first reflecting surface 30A to reflect the first scanning light L1 passing through the scanning window 11 through the scanning window 11 and return to the first photosensitive component 20 . The second background film 70 is disposed on the first side of the scanning window 11 and has a second reflecting surface 70A to reflect the second scanning light L2 passing through the scanning window 11 through the scanning window 11 and return to the second photosensitive component 60. . The first side and the second side are opposite sides, and the upper side and the lower side are described in FIG. 1. That is, the connecting lines between the first background sheet 30 and the first photosensitive element 20 intersect the scanning window 11.
於本實施例中,第一背景片30的第一反射面30A與掃描窗11為非平行設置,以便讓第一背景片30提供非標準白色背景來達成邊界偵測的效果。此外,第二背景片70的第二反射面70A與掃描窗11為非平行設置,以便讓第二背景片70提供灰階背景來達成邊界偵測的效果。第一反射面30A為反射第一掃描光線L1的面,而第二反射面70A為反射第二掃描光線L2的面。 In this embodiment, the first reflective surface 30A of the first background sheet 30 and the scanning window 11 are non-parallel, so that the first background sheet 30 provides a non-standard white background to achieve the effect of boundary detection. In addition, the second reflective surface 70A of the second background sheet 70 and the scanning window 11 are arranged non-parallel, so that the second background sheet 70 provides a grayscale background to achieve the effect of boundary detection. The first reflective surface 30A is a surface that reflects the first scanning light L1, and the second reflective surface 70A is a surface that reflects the second scanning light L2.
上述感光設備1可以更包含一第一透光基板40與一第二透光基板50,分別設置於掃描窗11的兩側,並且位於第一感光組件20與第一背景片30之間,或者位於第二感光組件60與第二背景片70之間。於本實施例中,第一透光基板40與第二透光基 板50為平行設置,兩者定義出掃描窗11的範圍。第一透光基板40與第二透光基板50的材質為選自於由玻璃、聚碳酸酯(PC)、聚丙烯(Polypropylene(PP))、丙烯腈-丁二烯-苯乙烯共聚物(Acrylonitrile Butadiene Styrene(ABS)樹脂)及聚甲基丙烯酸甲酯(PMMA)所組成的群組。於本實施例中,第一背景片30與第二背景片70都是呈現長條的片狀,可以減少透光基板與感光組件之間的空間。於另一實施例中,第一背景片30與第二背景片70可以以三角形的方式呈現,以提供方便安裝於透光基板或感光組件的效果。值得注意的是,掃描窗11並不必要是由第一透光基板40與第二透光基板50所定義,也可以由單一透光基板所定義,也可以由具有開口的導引片所定義。此外,第一透光基板40與第一背景片30的第一反射面30A為非平行設置,且第二透光基板50與第二背景片70的第二反射面70A為非平行設置。 The above-mentioned photosensitive device 1 may further include a first light-transmitting substrate 40 and a second light-transmitting substrate 50, which are respectively disposed on both sides of the scanning window 11 and are located between the first photosensitive element 20 and the first background sheet 30, or Located between the second photosensitive element 60 and the second background sheet 70. In this embodiment, the first transparent substrate 40 and the second transparent substrate The plates 50 are arranged in parallel, and both define the range of the scanning window 11. The material of the first transparent substrate 40 and the second transparent substrate 50 is selected from the group consisting of glass, polycarbonate (PC), polypropylene (Polypropylene (PP)), acrylonitrile-butadiene-styrene copolymer ( Acrylonitrile Butadiene Styrene (ABS) resin and polymethyl methacrylate (PMMA). In this embodiment, both the first background sheet 30 and the second background sheet 70 are in a long sheet shape, which can reduce the space between the light-transmitting substrate and the photosensitive component. In another embodiment, the first background sheet 30 and the second background sheet 70 may be presented in a triangular manner, so as to provide the effect of being conveniently mounted on a light-transmitting substrate or a photosensitive component. It is worth noting that the scanning window 11 is not necessarily defined by the first transparent substrate 40 and the second transparent substrate 50, it may also be defined by a single transparent substrate, or by a guide sheet having an opening. . In addition, the first transparent substrate 40 and the first reflective surface 30A of the first background sheet 30 are arranged non-parallel, and the second transparent substrate 50 and the second reflective surface 70A of the second background sheet 70 are arranged non-parallel.
於本實施例中,第一背景片30與掃描窗11呈現一第一角度A1設置,第二背景片70與掃描窗11呈現一第二角度A2設置,且第一角度A1與第二角度A2相等。於一例子中,第一角度A1介於3°與30°之間,且複數個第一感應元件22感應到的光強度在此區段的傾斜角度下所產生的反射線具有較大的模擬灰色的範圍。於另一例子中,第一角度A1介於10度與20度之間,較佳是12°與15°之間,且複數個第一感應元件22感應到的光強度在此區段的傾斜角度下所產生的反射線具有明確的模擬灰色的範圍。換句話說,當第一角度A1與第二角度A2皆為0°且第一背景片30與第二背景片70為白色時,第一感應元件22與第二感應元件62感應到最多的反射光線,為最亮;隨著當第一角度A1與第二角度A2角度逐 漸增加,從第一背景片30或/與第二背景片70反射出去的光線越多,第一感應元件22與第二感應元件62感應的亮度越暗,也就從感應到最亮的白色變成感應成灰色背景;第一角度A1與第二角度A2角越大,第一感應元件22與第二感應元件62感應到的光強度越弱,灰色越深。如此,用設置傾斜的第一背景片30與第二背景片70所反射的光線做感光組件對亮度校正,則因為傾斜設置所以部分光線因為反射出去或漫射的影響,導致第一感應元件22與第二感應元件62所吸收的光線比較少,在本實施例背景片為白色時,所感應到的光線為灰色的性質,即校正時用感應的光線灰色做標準顏色。 In this embodiment, the first background film 30 and the scanning window 11 present a first angle A1 setting, the second background film 70 and the scanning window 11 present a second angle A2 setting, and the first angle A1 and the second angle A2 equal. In an example, the first angle A1 is between 3 ° and 30 °, and the light intensity induced by the plurality of first sensing elements 22 has a larger simulation of the reflection line generated under the inclined angle of this section. Gray scope. In another example, the first angle A1 is between 10 ° and 20 °, preferably between 12 ° and 15 °, and the light intensity sensed by the plurality of first sensing elements 22 in this section is inclined. The reflection lines produced at the angle have a clear range that simulates gray. In other words, when the first angle A1 and the second angle A2 are both 0 ° and the first background sheet 30 and the second background sheet 70 are white, the first sensing element 22 and the second sensing element 62 sense the most reflections. The light is the brightest; as the first angle A1 and the second angle A2 Increasingly, the more light reflected from the first background sheet 30 or / and the second background sheet 70, the darker the brightness sensed by the first sensing element 22 and the second sensing element 62, and the brightest white is sensed from A gray background is sensed; the larger the angle between the first angle A1 and the second angle A2, the weaker the light intensity sensed by the first sensing element 22 and the second sensing element 62, and the darker the gray. In this way, using the light reflected by the inclined first background film 30 and the second background film 70 as the light-sensitive component to correct the brightness, because of the oblique setting, part of the light is reflected or diffused, resulting in the first sensing element 22 Compared with the light absorbed by the second sensing element 62, when the background film is white in this embodiment, the light that is sensed is gray, that is, the sensed light gray is used as the standard color during correction.
於另一例子中,第一角度A1與第二角度A2不相等,以便為正反面具有不同背景的文件提供適當的不同光強度模擬不同的背景顏色。 In another example, the first angle A1 and the second angle A2 are not equal, so as to provide documents with different backgrounds on the front and back with appropriate different light intensities to simulate different background colors.
第一感光組件20包含一第一發光元件21與複數個第一感應元件22。第二感光組件60包含一第二發光元件61與複數個第二感應元件62。第一背景片30與複數個第一感應元件22相對設置,且第二背景片70與複數個第二感應元件62相對設置。第一發光元件21朝向掃描窗11發射第一掃描光線L1,第二發光元件61朝向掃描窗11發射第二掃描光線L2。複數個第一感應元件22接收第一背景片30所反射的第一掃描光線L1,且複數個第二感應元件62接收第二背景片70所反射的第二掃描光線L2。 The first photosensitive component 20 includes a first light emitting element 21 and a plurality of first sensing elements 22. The second photosensitive element 60 includes a second light emitting element 61 and a plurality of second sensing elements 62. The first background sheet 30 is disposed opposite to the plurality of first sensing elements 22, and the second background sheet 70 is disposed opposite to the plurality of second sensing elements 62. The first light emitting element 21 emits a first scanning light L1 toward the scanning window 11, and the second light emitting element 61 emits a second scanning light L2 toward the scanning window 11. The plurality of first sensing elements 22 receive the first scanning light L1 reflected by the first background sheet 30, and the plurality of second sensing elements 62 receive the second scanning light L2 reflected by the second background sheet 70.
除了感應第一背景片30與第二背景片70的灰階值以外,第一感光組件20與第二感光組件60也可用來掃描一資料媒體M,所以第一背景片30的第一反射面30A傾斜地位於第一感光組件20掃描資料媒體M時的一光路徑的一延伸路徑上。當資料媒 體M沿著走紙通道10被感光設備1的一饋送機構3饋送通過掃描窗11時,第一掃描光線L1的一第一部分被資料媒體M的一第一面M1反射回到第一感光組件20,而產生一第一掃描信號S1。第一掃描光線L1的一第二部分被第一背景片30反射回到第一感光組件20,而產生一第一背景信號S2。第一掃描光線L1的第一部分與第二部分是沿著圖面的方向延伸,構成資料媒體M的寬度方向(大致垂直於資料媒體M的行進方向,如果圖1的平面是XY平面,則寬度方向就是Z軸方向)的照明光線。第二掃描光線L2的一第一部分被資料媒體M的一第二面M2反射回到第二感光組件60,而產生一第二掃描信號S3。第二掃描光線L2的一第二部分被第二背景片70反射回到第二感光組件60,而產生一第二背景信號S4。第二掃描光線L2的第一部分與第二部分是沿著圖面的方向延伸,構成資料媒體M的寬度方向的照明光線。於本實施例中,饋送機構3包含饋送滾輪3A、3B、3C與3D。掃描窗11介於饋送滾輪3A、3B與饋送滾輪3C、3D之間,且從資料媒體M到第一感應元件22的第一光路以及從第一背景片30到第一感應元件22的第二光路大致與資料媒體M及走紙通道10垂直。 In addition to sensing the grayscale values of the first background sheet 30 and the second background sheet 70, the first photosensitive element 20 and the second photosensitive element 60 can also be used to scan a data medium M. Therefore, the first reflective surface of the first background sheet 30 30A is located obliquely on an extended path of a light path when the first photosensitive element 20 scans the data medium M. When data media When the body M is fed along the paper path 10 by a feeding mechanism 3 of the photosensitive device 1 through the scanning window 11, a first portion of the first scanning light L1 is reflected by a first surface M1 of the data medium M back to the first photosensitive component 20, and a first scan signal S1 is generated. A second portion of the first scanning light L1 is reflected back to the first photosensitive element 20 by the first background sheet 30, and a first background signal S2 is generated. The first part and the second part of the first scanning ray L1 extend along the direction of the drawing surface and constitute the width direction of the data medium M (approximately perpendicular to the direction of travel of the data medium M. If the plane of FIG. 1 is the XY plane, the width Direction is the direction of the Z axis). A first portion of the second scanning light L2 is reflected by a second surface M2 of the data medium M back to the second photosensitive element 60 to generate a second scanning signal S3. A second portion of the second scanning light L2 is reflected by the second background sheet 70 back to the second photosensitive element 60 to generate a second background signal S4. The first part and the second part of the second scanning light L2 extend in the direction of the drawing surface, and constitute the illumination light in the width direction of the data medium M. In this embodiment, the feeding mechanism 3 includes feeding rollers 3A, 3B, 3C, and 3D. The scanning window 11 is between the feeding rollers 3A and 3B and the feeding rollers 3C and 3D, and the first optical path from the data medium M to the first sensing element 22 and the second optical path from the first background sheet 30 to the first sensing element 22 The optical path is approximately perpendicular to the data medium M and the paper path 10.
為了執行標準白的校正,感光設備1可以更包含一第一驅動機構80,連接至第一背景片30;以及一第二驅動機構85,連接至第二背景片70。於一掃描模式下,第一驅動機構80驅動第一背景片30的第一反射面30A相對於第一感光組件20旋轉成與掃描窗11呈現非平行設置,且第二驅動機構85驅動第二背景片70的第二反射面70A相對於第二感光組件60旋轉成與掃描窗11呈現非平行設置,也就是圖1所示的狀態。 In order to perform the standard white correction, the photosensitive device 1 may further include a first driving mechanism 80 connected to the first background sheet 30; and a second driving mechanism 85 connected to the second background sheet 70. In a scanning mode, the first driving mechanism 80 drives the first reflective surface 30A of the first background film 30 to rotate relative to the first photosensitive element 20 to be non-parallel to the scanning window 11, and the second driving mechanism 85 drives the second The second reflecting surface 70A of the background sheet 70 is rotated relative to the second photosensitive member 60 to be disposed in non-parallel with the scanning window 11, that is, the state shown in FIG. 1.
於一校正模式下,第一驅動機構80驅動第一背景片30相對於第一感光組件20旋轉成與掃描窗11大致平行,而第一感光組件20接收第一掃描光線L1而獲得一第一校正信號S5;且第二驅動機構85驅動第二背景片70相對於第二感光組件60旋轉成與掃描窗11大致平行,而第二感光組件60接收第二掃描光線L2而獲得一第二校正信號S6,也就是圖2所示的狀態。如此一來,感光設備1之一處理器90就可以依據第一校正信號S5來校正第一掃描信號S1,並依據第二校正信號S6來校正第二掃描信號S3。 In a calibration mode, the first driving mechanism 80 drives the first background film 30 to rotate relative to the first photosensitive element 20 to be substantially parallel to the scanning window 11, and the first photosensitive element 20 receives the first scanning light L1 to obtain a first A correction signal S5; and the second driving mechanism 85 drives the second background film 70 to rotate relative to the second photosensitive element 60 to be substantially parallel to the scanning window 11, and the second photosensitive element 60 receives the second scanning light L2 to obtain a second correction The signal S6 is the state shown in FIG. 2. In this way, a processor 90 of one of the photosensitive devices 1 can correct the first scan signal S1 according to the first correction signal S5, and correct the second scan signal S3 according to the second correction signal S6.
於其他模式下,第一驅動機構80也可以驅動第一背景片30轉動至不同的角度位置,以提供不同灰階度的背景,同樣的技術亦可應用至第二驅動機構85與第二背景片70。 In other modes, the first driving mechanism 80 can also drive the first background film 30 to rotate to different angular positions to provide different grayscale backgrounds. The same technology can also be applied to the second driving mechanism 85 and the second background. Tablet 70.
值得注意的是,圖1的視圖顯示出第一光路以及第二光路兩者有可能是同時存在的,這是因為第一背景片30通常被設計得較寬(寬度方向垂直於圖1的紙面),而資料媒體M有可能比第一背景片30來得窄,所以第一光路是位於資料媒體M的內側,而第二光路是位於資料媒體M的外側。 It is worth noting that the view of FIG. 1 shows that both the first light path and the second light path may exist at the same time, because the first background film 30 is generally designed to be wider (the width direction is perpendicular to the paper surface of FIG. 1). ), And the data medium M may be narrower than the first background film 30, so the first optical path is located inside the data medium M, and the second optical path is located outside the data medium M.
圖3顯示發光元件與感應元件的示意圖。如圖3所示,第一發光元件21包含兩個光源21A(單一光源亦可)與一個導光柱21B,導光柱21B將光源21A的光線均勻化並導向朝下運行。此外,這些第一感應元件22包含一個透鏡陣列22A與一個感測元陣列22B。同理,第二發光元件61包含兩個光源61A(單一光源亦可)與一個導光柱61B,導光柱61B將光源61A的光線均勻化並導向朝下運行。此外,這些第一感應元件22包含由一個透鏡陣列62A與一個感測元陣列62B。 FIG. 3 shows a schematic diagram of a light emitting element and a sensing element. As shown in FIG. 3, the first light-emitting element 21 includes two light sources 21A (a single light source may also be used) and a light guide post 21B. The light guide post 21B uniformizes and directs the light from the light source 21A to run downward. In addition, the first sensing elements 22 include a lens array 22A and a sensing element array 22B. Similarly, the second light-emitting element 61 includes two light sources 61A (a single light source may also be used) and a light guide post 61B. The light guide post 61B uniformizes and directs the light from the light source 61A to run downward. In addition, the first sensing elements 22 include a lens array 62A and a sensing element array 62B.
圖4A與圖4B分別顯示對應於圖1與圖2的光路圖的一個例子。如圖4A與圖4B所示,第一發光元件21發射出的第一掃描光線L1,如果遵循入射角等於反射角的定律(參考法線N),那麼反射光R1的強度最高,但是因為第一背景片30本身並非是鏡面,所以存在有些漫反射現象,使得反射光R2與R3的強度遞減。因此,圖4A的第一感應元件22所接收到的反射光的強度(低於反射光R3的強度)小於圖4B所接收到的反射光的強度(高於反射光R3的強度)。因此,傾斜式的第一背景片30可以提供灰階背景來達成資料媒體的掃描影像的邊界偵測的效果。 4A and 4B show an example of the optical path diagrams corresponding to FIGS. 1 and 2, respectively. As shown in FIGS. 4A and 4B, if the first scanning light L1 emitted by the first light-emitting element 21 follows the law of the incident angle equal to the reflection angle (refer to the normal N), the intensity of the reflected light R1 is the highest, but A background film 30 itself is not a mirror surface, so there is some diffuse reflection phenomenon, which causes the intensity of the reflected light R2 and R3 to decrease. Therefore, the intensity of the reflected light (lower than the intensity of the reflected light R3) received by the first sensing element 22 in FIG. 4A is smaller than the intensity of the reflected light (higher than the intensity of the reflected light R3) received in FIG. 4B. Therefore, the inclined first background film 30 can provide a grayscale background to achieve the effect of boundary detection of the scanned image of the data medium.
圖5A與圖5B分別顯示對應於圖1與圖2的光路圖的另一例子。以另外一個觀點來說,第一發光元件21的相同發散角的第一掃描光線L1的能量分佈在傾斜的第一背景片30上的長度為尺寸A,而分佈在水平的第一背景片30上的長度為尺寸B,其中尺寸A大於尺寸B,所以傾斜的第一背景片30導致光源能量的分散,使得第一感應元件22所收到的光線的能量下降,也就是感測到亮度降低。 5A and 5B show another example of the optical path diagrams corresponding to FIGS. 1 and 2, respectively. From another point of view, the length of the energy of the first scanning ray L1 of the first light emitting element 21 with the same divergence angle on the inclined first background sheet 30 is the size A, and the horizontal background sheet 30 is distributed. The length above is dimension B, where dimension A is larger than dimension B, so the inclined first background sheet 30 causes the energy of the light source to be dispersed, so that the energy of the light received by the first sensing element 22 decreases, that is, the brightness is sensed to decrease .
圖6顯示自動裁減的示意圖。圖7顯示歪斜校正的示意圖。如圖6與圖7所示,所掃描到的影像包含內圈的資料媒體M的影像IM及外圈的背景片的影像IB(包圍影像IM),因為影像IB的灰階度(偏暗,灰階度譬如是160)明顯小於影像IM的背景(偏亮,灰階度譬如是220)的灰階度,所以處理器90可以依據第一背景信號S2找尋對應於第一掃描信號S1的一影像IM的一個或多個邊界BD,且處理器90依據第二背景信號S4找尋對應於第二掃描信號S3的一影像IM的一個或多個邊界BD。如此,處理器90 可進行自動裁切及歪斜校正。 Figure 6 shows a schematic diagram of automatic cropping. FIG. 7 shows a schematic diagram of skew correction. As shown in FIG. 6 and FIG. 7, the scanned image includes the image IM of the data medium M in the inner circle and the image IB (enclosing the image IM) of the background film in the outer circle. The gray level (for example, 160) is significantly smaller than the gray level of the background of the image IM (brighter, and the gray level is, for example, 220), so the processor 90 can find a value corresponding to the first scan signal S1 according to the first background signal S2. One or more boundary BDs of the image IM, and the processor 90 searches for one or more boundary BDs of an image IM corresponding to the second scan signal S3 according to the second background signal S4. So, the processor 90 Can perform automatic cutting and skew correction.
於另一例子中,也可以採用固定式的背景片,於此情況下,處理器90可以依據第一背景信號S2來校正第一掃描信號S1,並依據第二背景信號S4來校正第二掃描信號S3。亦即,背景信號對應的灰階度為已知,可以依據此灰階度來作校正。 In another example, a fixed background film may also be used. In this case, the processor 90 may correct the first scan signal S1 according to the first background signal S2 and correct the second scan according to the second background signal S4. Signal S3. That is, the gray level corresponding to the background signal is known and can be corrected based on this gray level.
圖8顯示依據本發明較佳實施例的感光方法的流程圖。如圖8所示,本實施例亦提供一種感光方法,應用於上述感光設備1中。感光方法包含以下步驟。首先,於步驟ST1,饋送資料媒體M進入走紙通道10。接著,於步驟ST2,依據下述步驟產生第一掃描信號S1及第一背景信號S2的一混合信號:(a)於資料媒體M到達掃描窗11以前,使第一感光組件20感測第一掃描光線L1的第二部分;(b)於資料媒體M通過掃描窗11時,使第一感光組件20感測第一掃描光線L1的第一部分及第二部分;及(c)於資料媒體M離開掃描窗11後,使第一感光組件20感測第一掃描光線L1的第一部分。最後,於步驟ST3,依據第一背景信號S2的特性從混合信號中分離出第一掃描信號S1。第一背景信號S2的特性對應於第一背景片30的傾斜角度,也就是對應於上述的第一感應元件22所感應到的第一背景片30的第一反射面30A的灰階度。上述混合信號譬如是對應於圖6或圖7的整體影像的信號。如此可以達到背景偵測以進行自動裁切及歪斜校正的功能。 FIG. 8 shows a flowchart of a light sensing method according to a preferred embodiment of the present invention. As shown in FIG. 8, this embodiment also provides a photosensitive method, which is applied to the above-mentioned photosensitive device 1. The photosensitive method includes the following steps. First, in step ST1, the feed data medium M enters the paper feed path 10. Next, in step ST2, a mixed signal of the first scanning signal S1 and the first background signal S2 is generated according to the following steps: (a) Before the data medium M reaches the scanning window 11, the first photosensitive component 20 is caused to sense the first The second part of the scanning light L1; (b) when the data medium M passes through the scanning window 11, the first photosensitive member 20 senses the first part and the second part of the first scanning light L1; and (c) on the data medium M After leaving the scanning window 11, the first photosensitive component 20 is caused to sense a first portion of the first scanning light L1. Finally, in step ST3, the first scanning signal S1 is separated from the mixed signal according to the characteristics of the first background signal S2. The characteristic of the first background signal S2 corresponds to the inclination angle of the first background sheet 30, that is, the grayscale of the first reflection surface 30A of the first background sheet 30 sensed by the first sensing element 22 described above. The mixed signal is, for example, a signal corresponding to the entire image in FIG. 6 or FIG. 7. In this way, you can achieve background detection for automatic cropping and skew correction.
藉由上述的感光設備及感光方法,可以利用傾斜的背景片來提供灰階的背景而與資料媒體的白色背景有所區別,達成自動裁切及歪斜校正的功能。再者,透過驅動機構可以驅動背景片旋轉至水平狀態,以提供亮度校正的效果。此外,透過驅動機構可 以驅動背景片旋轉至其他傾斜角度,以提供不同灰階度的背景效果。上述特徵可以用單一背景片來完成,結構簡單且效果顯著,可為饋紙式掃描器提供一種有效的背景偵測的效果。 With the above-mentioned photosensitive device and method, a tilted background film can be used to provide a grayscale background, which is different from the white background of the data medium, and achieves the functions of automatic cropping and skew correction. In addition, the driving mechanism can drive the background film to rotate to a horizontal state to provide the effect of brightness correction. In addition, the drive mechanism can To drive the background film to rotate to other tilt angles to provide different grayscale background effects. The above features can be completed with a single background film, with a simple structure and significant effects, which can provide an effective background detection effect for a paper-fed scanner.
在較佳實施例之詳細說明中所提出之具體實施例僅用以方便說明本發明之技術內容,而非將本發明狹義地限制於上述實施例,在不超出本發明之精神及以下申請專利範圍之情況,所做之種種變化實施,皆屬於本發明之範圍。 The specific embodiments proposed in the detailed description of the preferred embodiments are only used to facilitate the description of the technical content of the present invention, rather than limiting the present invention to the above embodiments in a narrow sense, without exceeding the spirit of the present invention and the following patent applications The scope of the scope, the implementation of various changes, all belong to the scope of the present invention.
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1605188A (en) * | 2001-12-21 | 2005-04-06 | 佳能株式会社 | Sheet transport apparatus and image reading apparatus |
TW200845720A (en) * | 2007-02-16 | 2008-11-16 | Hitachi Omron Terminal Solutions Corp | Image reading method and image reading device |
JP2013065933A (en) * | 2011-09-15 | 2013-04-11 | Fuji Xerox Co Ltd | Image reading apparatus |
TW201439595A (en) * | 2012-12-20 | 2014-10-16 | Mitsubishi Electric Corp | Light guide, light source device, and image reading device |
TW201545534A (en) * | 2014-05-22 | 2015-12-01 | Avision Inc | Sheet-fed scanner and image scanning method using the same |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI246314B (en) * | 2004-06-30 | 2005-12-21 | Avision Inc | Sheet-fed scanner capable of switching backgrounds |
JP2009177310A (en) * | 2008-01-22 | 2009-08-06 | Kyocera Mita Corp | Image reader and image forming apparatus |
CN201629789U (en) * | 2010-01-08 | 2010-11-10 | 虹光精密工业(苏州)有限公司 | Scanner with background component |
JP5390418B2 (en) * | 2010-01-15 | 2014-01-15 | 株式会社Pfu | Image reading apparatus and image reading system |
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US8867107B1 (en) * | 2013-06-24 | 2014-10-21 | Fuji Xerox Co., Ltd. | Image reading apparatus and reading apparatus |
JP5532176B1 (en) * | 2013-07-18 | 2014-06-25 | 富士ゼロックス株式会社 | Image reading apparatus and image forming apparatus |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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JP2013065933A (en) * | 2011-09-15 | 2013-04-11 | Fuji Xerox Co Ltd | Image reading apparatus |
TW201439595A (en) * | 2012-12-20 | 2014-10-16 | Mitsubishi Electric Corp | Light guide, light source device, and image reading device |
TW201545534A (en) * | 2014-05-22 | 2015-12-01 | Avision Inc | Sheet-fed scanner and image scanning method using the same |
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