201251439 , 六、發明說明： 【發明所屬之技術領域】 本發明是有關一種影像擷取系統以及方法，特別是一種可同時獲 得不同灰階值之多個影像之影像擷取系統以及方法。 【先前技術】 影像擷取系統的快速普及，使得許多物件能夠以數位化的方式儲 存。然而，欲棟取物件之亮部區域以及暗部區域之亮度差異較大時， 例如X光片，習知之影像擷取系統無法以相同的影像擷取參數獲得清 晰呈現亮部區域以及暗部區域之細節之數位影像。 舉例而言，為了呈現暗部區域之細節，使用者可能提供較亮之照 明或較長之曝光時間以獲得較亮之數位影像。此時，數位影像中之亮 部區域可能過度曝光而一片亮白，因而無法呈現原物件中之亮部區域 之細節。相反的，為了呈現亮部區域之細節，使用者可能提供較暗之 照明或較短之曝光時間以獲得較暗之數位影像。此時，數位影像中之 暗部區域可能曝光不足而一片黑暗，因而無法呈現原物件中之暗部區 域之細節。為了克服上述問題，習知之影像擷取系統是以不同的影像 擷取參數，對物件進行多次影像擷取操作以獲得分別呈現亮部區域以 及暗部區域細^乡鄉像。如此造成影像數位化之㈣缺乏效率的 問題。 综上所述，如何同時獲得不同灰階值之多個影像便是目前極需努 力的目標。 【發明内容】 ^本發明提供一種影像擷取系統以及方法，其是提供包含不同波長 犯圍以及光強度之第_光線以m線之酬光，並感測第一光 線以及第二光線’以分職生不同灰階值m雌像以及一第 3 201251439 二感測影像。因此，本發明之影像擷取系統以及方法可在一次影像擷 取之操作中即可獲得不同灰階值之多個影像。 本發明一實施例之影像擷取系統包含一光源以及一影像感測器。 光源用以產生一照明光，其至少包含一第一光線以及一第二光線，且 第一光線以及第二光線之波長範圍以及光強度相異。影像感測器用以 感測經一物件反射或透射物件之第一光線以及第二光線，並產生不同 灰階值之一第一感測影像以及一第二感測影像。 本發明另一實施例之影像擷取方法包含以一光源產生一照明光， 其至少包含一第一光線以及一第二光線，且第一光線以及第二光線之 波長範圍以及光強度相異；以及，以一影像感測器分別感測經—物件 反射或透射物件之第一光線以及第二光線，以產生不同灰階值之一第 一感測影像以及一第二感測影像。 以下藉由具體實施例配合所附的圖式詳加說明，當更容易瞭解本 發明之目的、技術内容、特點及其所達成之功效。 【實施方式】 請參照圖1，本發明之一實施例之影像擷取系統包含一光源u以 及一影像感測器12。光源11用以產生一照明光L。舉例而言，光源u 可為發光一極體或冷陰極螢光燈(cold cathode fluorescent lamp， CCFL)。特別的是，照明光l至少包含一第一光線lr以及一第二光線 LB，且第一光線LR以及第二光線LB之波長範圍以及光強度相異。於 一實施例中，光源11可包含一第一發光元件11R以及一第二發光元件 11B，其分別產生所需之第一光線LR以及第二光線LB。或者，請參照 圖2，光源11可包含一發光元件U1以及一濾光元件U2。發光元件 111用以產生包含第一光線LR以及第二光線LB之波長範圍之多波長 光線LM。濾光元件112則設置於發光元件in之出光側，用以過渡發 光元件111所產生之多波長光線LM，以產生所需之照明光L，亦即包 含不同波長範圍以及光強度之第一光線LR以及第二光線LB。 201251439 影像感測器12則用以感測經一物件20反射或透射物件20之第一 光線LR以及第二光線LB，並分別產生一第一感測影像以及一第二感 測影像。於一實施例中，影像感測器12可為一彩色影像感測器，因此， 其可分別感測紅光、綠光以及藍光。或者，影像感測器可包含一第一 影像感測元件以及一第二影像感測元件，以分別感測第一光線LR以及 第二光線LB，並產生第一感測影像以及第二感測影像。於一實施例中， 衫像感測裔12可為·—電何柄合元件(Charge Coupled Device，CCD)、互 補式金屬氧化物半導體(Complementary Metal Oxide Semiconductor， CMOS)感測器或接觸式影像感測器(c〇ntact image sensor，CIS)。 舉例而言，物件20可為一 X光片、底片或灰階影像。·第一光線 LR可為紅光波長範圍之紅光；第二光線LB可為藍光波長範圍之藍光， 且第二光線LB之光強度僅為第一光線Lr之光強度的5〇〇/。。當包含第 一光線LR以及第二光線LB之照明光L穿透物件20並被影像感測器 12操取時感測第一光線lr可獲得較亮之第一感測影像，亦即灰階 較高之影像；制第光線LB則可獲得較暗之第三_影像，亦即灰 ，較低之f彡像。因此，本發明之影細轉紐夠在欠影像操取之 刼作中即獲得不同灰階值之多個影像，因而提升影像擷取操作之效率。 需注意者，上述實施例僅提供包含不同光強度之紅光以及藍光之 照明光’縣观麻光缝藍光轉得二财同灰階值之影像。然 而’本發a騎屬技觸域者可·解的是啊提供包含多種波長範 圍以及光強度之照明光，例如紅光、綠光以及藍光，甚至紫外光或紅 外光，即可同時獲得二個以上不同灰階值之影像。 、’ 其與影像感測器12電性連接。影像處理模組 ，tL實ίΠ，本發明之影像齡系統更包含-影像處理模組 ^器^? — _職从第二_影像進行各郷^理。舉例 而5 ’衫像處理模組U可將清楚呈現暗部區域細節 現亮缠域細節之第二感測影像合成，以獲得同時清楚ΐ現古、 域以及暗部區域之一合成影像。 見儿 13可對獲得自影像 201251439 於一實施例中，本發明之影像擷取系統可包含一光學透鏡14，其 設置於影像感測器12之前端。光學透鏡丨4可聚焦從物件2〇反射或透 射物件20之照明光L於影像感測器12。舉例而言，光學透鏡14可為 一桿狀透鏡(rod lens)或單透鏡(Singie iens)。 請再參照圖2,本發明之影像擷取系統可包含一驅動裝置15。於 一貫施例令，驅動裝置15可影像感測器12連接，以驅動影像感測器 12沿著執道151相對於物件2〇移動，以對物件2〇進行掃描。但不限 於此，驅動裝置15亦可與一放置物件2〇之平台連接，並驅動平台使 物件20相對於影像感測器12移動，亦可達到影像感測器12對物件2〇 進行掃描之目的。 4參照圖1以及圖3’說明本發明一實施例之影像擷取方法。首先， 以-光源11產生-照明光。照明光至少包含不同波長細以及光強度 之-第-猶LR以及H線LB(S3小接著，以—影像感測器12 分別感測經-物件2G反射鱗射物件如之第—光線以以及第二光線 LB」以產生不同灰階值之―第―制影像以及—第二制影像卿）。 上述步驟之詳細綱如前所述，在此科贅述。健者，本發明之影 像操取方法可包含影像處理步驟，以對不同灰階值之第—感測影像= 及第二感測影像進行影像處理(833)，例如影像合成。 綜合上述，本發社影像練纟期及方法是提供包含不同 二圍以及光強度之多種紐之_光照射物件，再分观測從物件 旦件ίΓ波長範圍之光線即可產生多個不同灰階值之感測 即可獲仔獨灰階值之多個影像，A幅提升影像娜操作之效率。 以上所述之實施例僅是為說明本發明之技術思想及特點 在使熟習此項賴之人该_解本發明之喊雌 告= =限定本發明之專利顧，即大凡依本發明所揭示之精神^2 專良化或修飾’仍應涵蓋在本㈣之專利細内。 ： 201251439 【圖式簡單說明】 圖1為一示意圖，顯示本發明一實施例之影像掘取系統。 圖2為一示意圖，顯示本發明另一實施例之影像掏取系統。 圖3為一流程圖，顯示本發明一實施例之影像擷取方法。 【主要元件符號說明】 11 光源 111 發光元件 112 濾光元件 11B 第二發光元件 11R 第一發光元件 12 影像感測器 13 影像處理模組 14 光學透鏡 15 驅動裝置 151 軌道 20 物件 L 照明光 LB 第二光線 LM 多波長光線 LR 第一光線 S31-S33 影像掏取方法201251439, VI. Description of the Invention: [Technical Field] The present invention relates to an image capturing system and method, and more particularly to an image capturing system and method for simultaneously obtaining multiple images of different grayscale values. [Prior Art] The rapid spread of image capture systems has enabled many objects to be stored in a digital manner. However, when there is a large difference in brightness between the bright portion and the dark portion of the object to be taken, such as an X-ray film, the conventional image capturing system cannot obtain the details of the bright portion and the dark portion with the same image capturing parameters. Digital image. For example, to present details of the dark portion, the user may provide a brighter illumination or a longer exposure time to obtain a brighter digital image. At this time, the bright areas in the digital image may be overexposed and bright, so that the details of the bright areas in the original object cannot be presented. Conversely, to present details of the highlight area, the user may provide a darker illumination or a shorter exposure time to obtain a darker digital image. At this time, the dark portion of the digital image may be underexposed and dark, so that the details of the dark portion of the original object cannot be presented. In order to overcome the above problems, the conventional image capturing system uses different image capturing parameters to perform multiple image capturing operations on the object to obtain a bright region and a dark region. This causes the image to be digitized (4) the lack of efficiency. In summary, how to obtain multiple images of different grayscale values at the same time is the goal that is currently in great demand. SUMMARY OF THE INVENTION The present invention provides an image capturing system and method, which provide a light beam containing m-rays of different wavelengths and light intensity, and senses the first light and the second light. Divided into different grayscale values m female images and a 3rd 201251439 two sensing images. Therefore, the image capturing system and method of the present invention can obtain multiple images of different grayscale values in one image capturing operation. An image capturing system according to an embodiment of the invention includes a light source and an image sensor. The light source is configured to generate an illumination light, and the light source includes at least a first light and a second light, and the wavelength ranges of the first light and the second light and the light intensity are different. The image sensor is configured to sense the first light and the second light reflected or transmitted through the object, and generate one of the first sensing image and the second sensing image with different grayscale values. An image capturing method according to another embodiment of the present invention includes: generating, by a light source, an illumination light comprising at least a first light and a second light, and the wavelength ranges and light intensities of the first light and the second light are different; And sensing, by the image sensor, the first light and the second light of the object reflecting or transmitting the object to generate a first sensing image and a second sensing image of different grayscale values. The purpose, technical contents, features, and effects achieved by the present invention will become more apparent from the detailed description of the appended claims. [Embodiment] Referring to FIG. 1, an image capturing system according to an embodiment of the present invention includes a light source u and an image sensor 12. The light source 11 is used to generate an illumination light L. For example, the light source u can be a light-emitting diode or a cold cathode fluorescent lamp (CCFL). In particular, the illumination light 1 includes at least a first light ray lr and a second light ray LB, and the wavelength ranges of the first light ray LR and the second light ray LB and the light intensity are different. In one embodiment, the light source 11 can include a first light-emitting element 11R and a second light-emitting element 11B that respectively generate a desired first light ray LR and a second light ray LB. Alternatively, referring to Fig. 2, the light source 11 may include a light emitting element U1 and a filter element U2. The light-emitting element 111 is configured to generate a multi-wavelength ray LM comprising a wavelength range of the first light ray LR and the second light ray LB. The filter element 112 is disposed on the light-emitting side of the light-emitting element in for transitioning the multi-wavelength light LM generated by the light-emitting element 111 to generate the desired illumination light L, that is, the first light including different wavelength ranges and light intensity. LR and second light LB. The image sensor 12 is configured to sense the first light LR and the second light LB of the object 20 reflected or transmitted through an object 20, and respectively generate a first sensing image and a second sensing image. In one embodiment, the image sensor 12 can be a color image sensor, so that it can sense red, green, and blue light, respectively. Alternatively, the image sensor may include a first image sensing component and a second image sensing component to respectively sense the first light LR and the second light LB, and generate the first sensing image and the second sensing. image. In one embodiment, the shirt image sensing 12 can be a Charge Coupled Device (CCD), a Complementary Metal Oxide Semiconductor (CMOS) sensor, or a contact image sensing device. (c〇ntact image sensor, CIS). For example, object 20 can be an X-ray film, a negative film, or a grayscale image. The first light LR may be red light in the red wavelength range; the second light LB may be blue light in the blue light wavelength range, and the light intensity of the second light LB is only 5 〇〇/ of the light intensity of the first light Lr. . When the illumination light L including the first light LR and the second light LB penetrates the object 20 and is manipulated by the image sensor 12, the first light 1r is sensed to obtain a brighter first sensing image, that is, a gray scale. The higher image; the first light LB can obtain a darker third image, that is, gray, lower f image. Therefore, the shadow switch of the present invention can obtain multiple images of different gray scale values in the operation of under-image manipulation, thereby improving the efficiency of the image capture operation. It should be noted that the above embodiment only provides the illumination of the red light and the blue light including the different light intensities. However, 'the hair of the genius can be solved by providing illumination light with multiple wavelength ranges and light intensity, such as red light, green light and blue light, or even ultraviolet light or infrared light. More than one image of different grayscale values. , ' is electrically connected to the image sensor 12 . The image processing module, the image processing system of the present invention further includes an image processing module, and the image processing module is configured to perform various operations from the second image. For example, the 5'-shirt image processing module U can synthesize the second sensing image that clearly shows the details of the dark region and the details of the bright-wound region to obtain a synthetic image that is clear at the same time as one of the ancient, regional and dark regions. See image 13 201251439. In one embodiment, the image capture system of the present invention can include an optical lens 14 disposed at the front end of the image sensor 12. The optical lens unit 4 can focus the illumination light L from the object 2 to reflect or transmit the object 20 to the image sensor 12. For example, the optical lens 14 can be a rod lens or a single lens (Singie iens). Referring again to FIG. 2, the image capture system of the present invention can include a drive device 15. In a conventional embodiment, the driving device 15 can be connected to the image sensor 12 to drive the image sensor 12 to move along the road 151 relative to the object 2 to scan the object 2〇. However, the driving device 15 can also be connected to a platform on which the object 2 is placed, and the platform is driven to move the object 20 relative to the image sensor 12, and the image sensor 12 can scan the object 2〇. purpose. 4 illustrates an image capture method according to an embodiment of the present invention with reference to FIGS. 1 and 3'. First, the illumination light is generated by the -light source 11. The illumination light includes at least different wavelengths and light intensities - the first-semi-LR and the H-line LB (S3 is small, and the image sensor 12 senses the object-like 2G-reflecting scale object as the first light, respectively) The second ray LB" is used to generate a "first" image of different grayscale values and a second image. The details of the above steps are as described above and are described in this section. The image processing method of the present invention may include an image processing step for performing image processing (833) on the first-sensing image= and the second sensing image of different grayscale values, such as image synthesis. In summary, the hairdressing period and method of the present invention is to provide a plurality of light-irradiating objects including different types of measurements and light intensities, and then to observe a plurality of different grays from the light of the wavelength range of the object. The sensing of the order value can obtain multiple images of the gray scale value, and the A image can improve the efficiency of the image processing. The embodiments described above are only for explaining the technical idea and the features of the present invention, and the person who is familiar with the present invention is to claim the invention of the present invention. The spirit of ^2 specialization or modification 'should still be covered in the patents of this (4). BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing an image capturing system according to an embodiment of the present invention. 2 is a schematic view showing an image capturing system according to another embodiment of the present invention. FIG. 3 is a flow chart showing an image capturing method according to an embodiment of the present invention. [Main component symbol description] 11 Light source 111 Light-emitting element 112 Filter element 11B Second light-emitting element 11R First light-emitting element 12 Image sensor 13 Image processing module 14 Optical lens 15 Driving device 151 Track 20 Object L Illumination light LB Two light LM multi-wavelength light LR first light S31-S33 image capturing method