CN101035183A - Scanner with dual charge-coupled element array and scanning method thereof - Google Patents
Scanner with dual charge-coupled element array and scanning method thereof Download PDFInfo
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Abstract
A scanner with double CCD arrays and its scanning and image processing method features that two independent manuscript images are respectively captured by the double CCD arrays in the same scanning period, the scanner can repair the penetrated manuscript and the reflected manuscript by a, b, two times of definition and c, the image defects of reflected manuscript are judged by the different incident angles of two light sources, the image defects of penetrated manuscript or reflected manuscript are judged by the image difference between two CCD arrays, the two CCD arrays are shifted by 1/2 pixel distance in length direction to double definition, and the two CCD arrays have different exposure times to reach high dynamic range.
Description
Technical field
The present invention is about a kind of scanner and scanning and image treatment method, and particularly two ccd array are to capture two contribution images independently during with a scanning motion respectively.
Background technology
Scanner (Scanner) is a kind of image capture unit, can be used to scan the image on the contribution and is converted to the number format that computer can show, edits, stores, handles and export.
The contribution that can be scanned be divided into penetrate original text with the reflection original text, penetrate original text and comprise the contribution of part printing opacities such as egative film and lantern slide, and the reflection original text comprises lighttight contributions such as photograph, printed matter and various stationery file, the TaiWan, China patent of letters patent book number 161970 has disclosed one can scan the scanner that penetrates original text and reflection original text, and very general at penetrating original text and reflecting all spendable dual-purpose scanner of original text at present.
Because volume is little, cheap, platform-type scanner (Flat bed scanner) is to use the most general a kind of scanner, its basic functional principle is to have a probe (OpticalCarriage) that can move according to program control, and that contribution is kept in scanning process is motionless, probe can programme controlled stepper motor links to each other and is driven by it level and smooth moving on a slide rail with one usually, and it comprises light sensing array usually, in order to change the reflector group of direction of light, and the focal imaging camera lens of the image light focal imaging of reflection or transmission to light sensing array.
The rayed that light source sends is on contribution, the image light of its reflection or transmission incides the line style light sensing array that can make opto-electronic conversion again, image light converts the electronic simulation signal to after by line style light sensing array exposure capture, and then be converted in the memory that digital signal is stored in scanner, because the line style light sensing array that direction is set is vertical mutually with the direction that probe moves, so via program suitably the gated sweep device move the scanning process that can finish contribution with the exposure capture of line style light sensing array, obtain complete bidimensional image numerical data, be stored in the computer of scanner and do follow-up processing.
Charge coupled cell (Charge Coupled Device, CCD) reasonable price of array and best in quality, so it is the most frequently used line style light sensing array, ccd array is the structure of a strip, combine by charge coupled cell is continuous, each charge coupled cell is represented a pixel (pixel), its definition (Resolution) is represented with dpi (dot per inch), for example to represent its definition be that its every inch has 1200 pixels to 1200dpi, the black and white scanner adopts single-row GTG ccd array, colour scanner adopts RGB (RGB) ccd array of three row, as shown in Figure 1, the red ccd array 3 of RGB ccd array 2, green ccd array 4, can distinguish the image light of three kinds of colors of sensing RGB with blue ccd array 5, store and output after synthesizing color imaging data via scanner.
Adding fast scan speed is two general objectives that scanner is pursued with promoting clearness, if keep the length of ccd array constant, increases the area that pixel count will correspondingly reduce single photo-sensitive cell.The photo-sensitive cell area dwindles the reduction of the signal to noise ratio (Signal to Noise Ratio) that can bring susceptibility and image.Therefore, in order to obtain the scan-image of equal quality, the time for exposure that scanner just must increase each scanning promotes the signal to noise ratio of image, will increase the sweep time of integral body thus and has reduced sweep speed, and this is the shortcoming of the method that promotes clearness with the increase pixel count.
Therefore, also there is other different solution to promote clearness, NEC for example, Toshiba, and all there is the product of staggered (Stagger) type ccd array in Japanese firm such as Sony, utilize the ccd array of two half-pixel distances that stagger that the definition of scanner is risen to twice, as shown in Figure 2, staggered RGB ccd array 10 has been arranged 6 ccd array 11 altogether, 12,13,14,15,16, that is it is red, red, green, green, blue, blue, the pixel distance of adjacent two pixels of each bar ccd array is " P ", and per two homochromy ccd array stagger half-pixel apart from " P/2 ", so can rise to twice to definition, if the definition of monochromatic ccd array is 1200dpi, then the definition of scanner is 2400dpi.
In addition, the United States Patent (USP) of letters patent book number 6707583 has disclosed another kind of scanner framework and the method that promotes clearness, the probe that contains ccd array has the degree of freedom vertical with the scanning direction, be to twice of contribution scanning, scanning the front wheel driving probe in the second time makes ccd array in direction top offset one distance vertical with the scanning direction, this the distance be in the ccd array two pixel distances 1/2nd, therefore, through image processing with synthetic for the first time with secondary scan-image after, the definition of image output is the twice of the image of run-down only.
The method that this kind promotes clearness must scan twice to contribution, so the entire scan time increases to twice.
Except sweep speed and definition, people also increase day by day to the quality requirements of scan-image, progress along with science and technology, can utilize various technology to repair on the contribution because heterogeneous point (dust, pollutant or scratch) the image flaw that caused, digitized video repair function (the ICE of KADC (Kodak Austin Development Center) company for example, Image Correction Enhancement) and the United States Patent (USP) of letters patent book number 5266805, the dyestuff that utilizes egative film is to infrared light (Infrared light, IR) be transparent, and heterogeneous be the opaque relatively fact to infrared light, respectively with twice on visible light and infrared light scanning egative film, compare the heterogeneous point that its image can detect egative film, can store and export the image of reparation via image processing technique; In addition, the TaiWan, China patent of letters patent book number 120212, utilize two light sources that the reflection original text is scanned with different incident angles respectively, because heterogeneous point can cause different shade scopes to the incident light of different angles, so compare the heterogeneous point that the image of twice scanning can detect the reflection original text, can store and export the image of reparation via image processing technique.
Above-mentioned image renovating method must scan twice to contribution, so the entire scan time increases to twice.
In addition, high dynamic range (Dynamic Range) also is one of target of scanner pursuit, if dark space (Shadows) image detail of scanning gained is distinct more then dynamic range scanner is high more, and the exposure of each scan line that extends (exposure) time can make the details of dark space image distinct, but thus, ccd array may be saturated because of excessive exposure, thereby lost the image detail in clear zone, it is with the different time for exposure contribution to be scanned twice respectively that a kind of way is arranged, the image that synthesizes twice scanning gained again via image processing technique, short scan-image of time for exposure is adopted in the clear zone, and long scan-image of time for exposure is adopted in the dark space, so can store and export the image with high dynamic range.
The method that this kind improves dynamic range must scan twice to contribution, so the entire scan time increases to twice.
Summary of the invention
In order to solve the shortcoming that prior art promotes clearness sweep speed is reduced with the increase pixel count, and another prior art of solution must scan the shortcoming to promote clearness twice to contribution, one of purpose of the present invention provides scanner and a scanning and the image treatment method with two ccd array, two ccd array are with capturing two contribution images independently during scanning motion respectively, and the function of twice definition is reached in the relative displacement that utilizes two ccd array to have 1/2 pixel distance on its length direction.
Must scan twice to repair to contribution in order to solve prior art by heterogeneous point (dust, pollutant or scratch) shortcoming of the image fault that causes, one of purpose of the present invention provides scanner and a scanning and the image treatment method with two ccd array, two ccd array are with capturing two contribution images independently during scanning motion respectively, and the different incident angle that utilizes two light sources caused different shades to differentiate the image fault of reflection original text and repair heterogeneous o'clock at two ccd array, or utilized the heterogeneous image difference that visible light and infrared light are caused at two ccd array to differentiate the also reparation of image fault that penetrates original text or reflection original text.
Must scan twice to improve the shortcoming of dynamic range to contribution in order to solve prior art, one of purpose of the present invention provides scanner and a scanning and the image treatment method with two ccd array, two ccd array are with capturing two contribution images independently during scanning motion respectively, and utilize two ccd array to have the purpose that the different time for exposure of length reaches the scan-image with high dynamic range.
Of the present invention have one of the scanner of two ccd array and purpose of scanning and image treatment method thereof be at penetrate original text and the reflection original text image scan, provide the reparation of a. image with the framework that separates or integrate with double focusing imaging lens or single focal imaging camera lens, b. twice definition, and c. high dynamic range three kinds of operations mode and function.
Therefore, scanner with two ccd array of the present invention and scanning thereof and the image treatment method quality that can effectively reduce sweep time and promote scan-image.
In order to achieve the above object, one aspect of the present invention is the scanning at the reflection original text, probe comprises two light sources, its incident beam forms two reflected image light beams with different incident angle on reflection original text surface, be imaged onto two ccd array by two focal imaging lens focus respectively again, this two ccd array is to capture two respectively independently to reflect the original text image during a same scanning motion.
In order to achieve the above object, the present invention is at the scanning that penetrates original text on the other hand, the incident beam of light source forms the transmission image strip in the back that penetrates original text, probe comprises a light-dividing device beam split of transmission image strip is become two bundles, be imaged onto two ccd array by two focal imaging lens focus respectively again, this two ccd array is to capture two respectively independently to penetrate the original text image during a same scanning motion.
In order to achieve the above object, another aspect of the invention is to utilize two switchable speculums to be set to come the toggle reflections original text and penetrate two kinds of scan operation mode of original text in probe.
In order to achieve the above object, one embodiment of the invention are the scanning at the reflection original text, the incident beam of light source forms the reflected image light beam on reflection original text surface, by be positioned at a focal imaging camera lens after a light-dividing device beam split become after the two image beam splitting respectively focal imaging in two ccd array, this two ccd array is to capture two respectively during with a scanning motion independently to reflect the original text image.
In order to achieve the above object, another embodiment of the present invention is at the scanning that penetrates original text, the incident beam of light source forms the transmission image strip in the back that penetrates original text, by be positioned at a focal imaging camera lens after a light-dividing device beam split become after the two image beam splitting respectively focal imaging in two ccd array, this two ccd array is to capture two respectively during with a scanning motion independently to penetrate the original text image.
In order to achieve the above object, another embodiment of the present invention is to utilize a switchable speculum to be set to come the toggle reflections original text and penetrate two kinds of scan operation mode of original text in probe.
Description of drawings
Fig. 1 is the schematic diagram of the RGB ccd array of prior art.
Fig. 2 is the schematic diagram of the staggered RGB ccd array of prior art.
Fig. 3 is that the present invention has two ccd array and double focusing imaging lens and can scan the scanner configuration diagram that penetrates original text and first embodiment of reflection original text.
Fig. 4 A, Fig. 4 B and Fig. 4 C are that the scanner of Fig. 3 is at the scanning motion process schematic diagram that penetrates original text.
Fig. 5 A, Fig. 5 B and Fig. 5 C are the scanning motion process schematic diagram of the scanner of Fig. 3 at the reflection original text.
Fig. 6 A and Fig. 6 B are the scanning process schematic diagram of the second embodiment of the present invention at the dust particle on reflection original text surface.
Fig. 7 A and Fig. 7 B are two ccd array schematic diagrames of the relative displacement of the fourth embodiment of the present invention with 1/2 pixel distance.
Fig. 8 is the memory of diagram scanner stores two ccd array of Fig. 7 as how staggered mode a pixel data.
Fig. 9 is that the present invention has two ccd array and single focal imaging camera lens and can scan the scanner configuration diagram that penetrates original text and the 8th embodiment of reflection original text.
Embodiment
Scanner and scan method thereof with two ccd array of the present invention can be implemented with individual other framework at penetrating original text and reflecting original text respectively, also can be integrated into the assembling structure that single scanning penetrates original text and reflection original text, and can be divided into and have double focusing imaging lens and single first two assembling structure of focal imaging mirror by adding some switchable assemblies.
The first embodiment of the present invention is one and has the assembling structure that scanning of two ccd array and double focusing imaging lens penetrates original text and reflection original text, is illustrated in Fig. 3.
At first, the action that penetrates original text at scanning is illustrated, and penetrates original text 106 and is placed on the transparent platform 104, and in one embodiment, transparent platform 104 is the film holder platform (Film Holder) that maintains an equal level, in order to clamping egative film to be scanned in scanning position.One light source 100 is positioned at transparent platform 104 belows, this light source 100 is by a cold-cathode fluorescence lamp (Cold Cathode Fluorescent Lamp, CCFL) or visible light source similar and an infrarede emitting diode (Infrared-Light Emitting Diode with it, IR-LED) form, CCFL and IR-LED can light respectively or simultaneously, curved reflector 102 is the light dorsad that is sent in order to reflection source 100, in order to the intensity of the incident beam " E " of strengthening penetrating original text, if the intensity of light source 100 enough greatly also can not be provided with curved reflector 102.
The incident beam that light source 100 sends " E " passes to be incident to behind the transparent platform 104 and penetrates original text 106, the transmission image strip " T " that contains the image data that penetrates original text 106 enters probe 20, probe 20 and one can programme controlled motor (not shown) links to each other and is driven by it, can move at slide rail (not shown) upper edge " X " directional smoothing, probe 20 comprises a light-dividing device 200, in order to transmission image strip " T " beam split is become two transmission image beam splitting " T1 " and " T2 ", transmission image beam splitting " T1 ", " T2 " respectively with two ccd array 216,218 formation two are light path independently, in one embodiment, light-dividing device 200 is an optical splitter (Beam Splitter), and transmission image beam splitting " T1 " be by optical splitter with angle reflection roughly 50 percent transmission image strip " T " formed, and transmission image beam splitting " T2 " be by this optical splitter transmission roughly 50 percent transmission image strip " T " formed.
One stationary mirror (Fixed Mirror) 202, two is changeable penetrate original text pattern or reflection original text pattern changeable speculum (Switching Mirror) 204 and 206, two focal imaging camera lenses (FocusedImaging Lens) 208 and 210, reach two changeable filters (Switching Filter) 212 and 214 among two light paths; Stationary mirror 202 is in order to change the direction of transmission image beam splitting " T1 ", all right one way or the other switched mirror 204 and 206 is the directions that are used for changing transmission image beam splitting " T1 " and " T2 ", they insert light path when scanning penetrates original text, penetrate the image light of original text to the focal imaging camera lens in order to reflection, and go out light path in the time shift of scanning reflection original text, so that the image luminous energy of reflection original text passes through to the focal imaging camera lens, two focal imaging camera lenses 208 and 210 be transmission image beam splitting " T1 " and " T2 " respectively focal imaging be that light path is inserted or shifted out to visual operation mode in two ccd array 216 and 218, two changeable filters 212 and 214.
Fig. 4 A is the schematic diagram that penetrates the scanning motion process of original text 106, penetrating original text 106 keeps motionless, the light source lighted 100 and curved reflector 102 are followed probe 20 and are moved the distance of " Δ X1 " along " X " directions, and ccd array 216 and 218 every exposures once can obtain to penetrate the image data of the one scan line of original text 106.Shown in Fig. 4 B and Fig. 4 C, ccd array 216 and 218 is obtained in exposure and is penetrated after same position on the original text 106 " X1 " locates the image data of scan line, probe 20 moves the distance of " Δ X1 ", and ccd array 216 and 218 exposure is again obtained and penetrated the image data that scan line is located in position on the original text 106 " X2 ".
Therefore, via suitable program control, ccd array 216 and 218 scan line can be covered with in regular turn and penetrate original text 106 and obtain whole image data, change in the memory that is stored in scanner behind the electronic data and do follow-up image processing and output.
Explain for convenient, the ccd array 216 of present embodiment and 218 is represented with the single-row GTG ccd array with 5 pixels (pixel), and in fact it can be single-row GTG ccd array or the three row RGB ccd array with multiple definition such as the 600dpi of a plurality of pixels or 1200dpi.
Secondly, scanning motion at the reflection original text is illustrated, refer again to Fig. 3, reflection original text 110 is placed on the transparent platform 108, have two light sources 222 and 224 in the probe 20, in one embodiment, light source 222 and 224 is CCFL or visible light source similar with it, its incident beam " E1 " passes the surface reflection of transparent platform 108 backs at reflection original text 110 with " E2 ", the reflected image light beam " R1 " that contains the image data that reflects original text 110 returns probe 20 again with " R2 ", reflected image light beam " R2 ", " R1 " respectively with two ccd array 216,218 form two light paths, one escapement 230 is between two light sources 222 and 224, in order to separate two light paths, that is the reflected image light beam " R1 " of light source 222 only can be by ccd array 218 sensitization, and the reflected image light beam " R2 " of light source 224 only can be by ccd array 216 sensitization, two stationary mirrors 228 and 226, and two focal imaging camera lenses 208 and 210 are among two light paths.
Two stationary mirrors 228 and 226 are the directions that are used for changing reflected image light beam " R2 " and " R1 ", and in one embodiment, the image light path that visual actual design demand increase and decrease in the number of stationary mirror and position or change are reflected original text to transfer directly; Two focal imaging camera lenses 208 and 210 are that focal imaging is in two ccd array 216 and 218 respectively reflected image light beam " R2 " and " R1 ", and in the application of this reflection original text, all right one way or the other switched mirror 204 and 206, to reach two changeable filters 212 and 214 be to shift out light path.
Fig. 5 A is the schematic diagram of reflection original text 110 scanning motion processes, reflection original text 110 is kept motionless, two light sources 222 and 224 are lighted, and probe 20 moves the distance of " Δ X2 " along directions X, and ccd array 216 and 218 every exposures once can obtain to reflect the image data of the one scan line of original text 110.Shown in Fig. 5 B and Fig. 5 C, after ccd array 218 and 216 is obtained diverse location " X4 " and " X3 " respectively and is located the image data of scan line, probe 20 moves the distance of " Δ X2 ", and ccd array 218 and 216 exposure is again obtained the image data that diverse location " X6 " and " X5 " on the reflection original text 110 locate scan line.
Therefore, the action that penetrates original text 106 with scanning is similar, via suitable program control, ccd array 216 and 218 scan line can successively be covered with reflection original text 110 in regular turn and obtain whole image data, change in the memory that is stored in scanner behind the electronic data and do follow-up image processing and output.
Be familiar with those of ordinary skills when understanding, in one embodiment, the increase and decrease of visual actual design demand or change stationary mirror and changeable speculum in the scanner of Fig. 3 in light path quantity and the position penetrate original text or reflection original text with turnover image light path directly.
Can understand that by above explanation principal character of the present invention is that ccd array is with capturing two contribution images independently during scanning motion respectively, and the present invention is applicable to penetrating original text and reflection original text, therefore, do some detailings and default can be realized three kinds of special functions of the present invention according to the basic framework of Fig. 3: a. image is repaired, b. twice definition, the c. high dynamic range; Below with different embodiment framework and the method that the present invention is directed to the three kinds of special functions of realization that penetrate original text and reflection original text is described respectively.
At first, the image repair function that the present invention is directed to reflection original text 110 is described with second embodiment, refer again to Fig. 3, by the explanation of aforesaid reflection original text 110 scanning motion processes as can be known, ccd array 216 and 218 receives two light sources 224 and the 222 reflected image light in the surface reflection of reflection original text respectively, after scanning motion is finished, ccd array 216 and 218 is obtained the image data of reflection original text 110 respectively, light source 224 and 222 incident beams that sent " E2 " and " E1 " are the both sides at the normal between two light sources on reflection original text plane, that is to say that " E2 " and " E1 " have different incident angle, so the heterogeneous point (dust on reflection original text surface, pollutant, or scratch) reflection original text 110 images that can be scanned ccd array 216 and 218 cause different shade scopes; Please refer to Fig. 6 A, there is a dust particle 600 in reflection original text surface, it is " A1 " to the shade scope that the image of ccd array 216 causes, please refer to Fig. 6 B, the shade scope that the image of 600 pairs of ccd array 218 of dust particle causes is " A2 ", " A2 " is not equal to " A1 ", therefore, can detect the image fault that the heterogeneous point on the reflection original text causes via image processing technique comparison ccd array 216 and 218 image datas that scanned; Can store or export after repairing its image fault.
The 3rd embodiment explanation the present invention is directed to the image repair function that penetrates original text 106, refer again to Fig. 3, the CCFL of light source 100 and IR-LED light and follow probe 20 simultaneously and move along " X " direction, two changeable filters 212 and 214 are inserted light path, filter 212 and 214 is respectively visible light and infrared light filter, therefore ccd array 216 and 218 scans the image data that penetrates that reception penetrates the visible light of original text 106 and infrared light respectively, because penetrating the dyestuff of original text 106 is transparent to infrared light, and heterogeneous point (dust, pollutant and scratch) be opaque relatively to infrared light, therefore, via image processing technique comparison ccd array 216,218 image datas that scanned can detect and penetrate the image fault that the heterogeneous point on the original text causes; Can store or export after repairing its image fault.
The 4th embodiment explanation the present invention is directed to the twice definition function of reflection original text 110, please refer to Fig. 7 A and Fig. 7 B, ccd array 216 and 218 is successively obtained the image data that scan line is located in the position of reflecting on the original text 110 " X7 " respectively, explain for convenient, ccd array 216 and 218 is 7 pixels of drawing tools only, ccd array 216 and 218 has identical number of pixels and pixel distance " d ", ccd array 216 and 218 has the relative displacement of half-pixel distance " d/2 " on its length direction (" Z " direction), in one embodiment, the relative displacement of this " d/2 " can come driven CCD array 216 to move on a slide rail parallel with the Z direction to reach via a motor or a Linear Driving assembly are set.
Please refer to Fig. 8, the memory 800 of scanner is the twice of the number of pixels of ccd array 216 and 218 at the Number of Storage Units of this scan line, Number of Storage Units is 14 in this figure, and as shown in the figure, scanner stores the electron image data of ccd array 216 and 218 in staggered mode, that is the odd number memory unit stores the image data of ccd array 218, the even number memory unit stores the image data of ccd array 216, therefore at this one scan line, scanner has the image data of the twice of ccd array number of pixels, so the definition of scanner is the twice of ccd array definition, for example the definition of ccd array is 600dpi, then the definition of scanner is 1200dpi, because the entire scan image is made up of individual other scan line, so the definition of overall reflective original text 110 rises to the twice of ccd array definition.
The 5th embodiment explanation the present invention is directed to the twice definition function that penetrates original text 106, refer again to Fig. 3, when scanning penetrates original text 106, light source 100 is only lighted CCFL or visible light source similar with it, and two changeable filters 212 and 214 shift out light path, and ccd array 216 and 218 configuration and scanner be staggered, and to store the mode of its data identical with the 4th embodiment.
The 6th embodiment explanation the present invention is directed to the high dynamic range function of reflection original text 110, refer again to Fig. 3, the control signal of initialization system makes ccd array 216 have the different time for exposure of length with the scan line of 218 pairs of reflection original texts 110, so ccd array 216 and 218 is obtained the scan-image of the different reflection original text 110 of time for exposure length respectively, handle and synthesize both image datas again by image software, short image data of time for exposure is partly adopted in the clear zone of resultant image, long image data of time for exposure is partly adopted in the dark space of resultant image, the time for exposure of for example setting ccd array 216 is 4 times of time for exposure of ccd array 218, then the image data of ccd array 218 is adopted in the clear zone of resultant image, the image data of ccd array 216 is adopted in the dark space, therefore, the resultant image that can store or export is the distinct image with high dynamic range.
The 7th embodiment explanation the present invention is directed to the high dynamic range function that penetrates original text 106, please refer to Fig. 3, when scanning penetrates original text 106, light source 100 is only lighted CCFL or visible light source similar with it, and two changeable filters 212 and 214 shift out light path, and ccd array 216 and 218 adopts the mode of different time for exposure of length and scanner resultant image identical with the 6th embodiment.
In sum, the second embodiment of the present invention to the seven embodiment have illustrated via some detailings and default, can realize the operation mode that six kinds of users can select: M1. reflection original text-image reparation with the assembling structure of Fig. 3 of the present invention with double focusing imaging lens, M2. penetrate original text-image reparation, M3. reflect original text-twice definition, M4. penetrate original text-twice definition, M5. reflects original text-high dynamic range, and M6. penetrates original text-high dynamic range.
Be familiar with those of ordinary skill in the art when understanding, scanner and the scan method thereof with two ccd array and double focusing imaging lens of the present invention also can be implemented with individual other framework at penetrating original text and reflecting original text respectively.
The eighth embodiment of the present invention is to have scanning of single focal imaging camera lens to penetrate original text and the assembling structure that reflects original text, Fig. 9 is its configuration diagram, and probe 30 comprises following assembly: a light source 300, a stationary mirror 302, be changeable penetrate original text pattern or reflection original text pattern changeable speculum 304, a focal imaging camera lens 308, a light-dividing device 310, two changeable filters 312 and 314, reach two ccd array 316 and 318.
At first, the framework of key diagram 9 is at the light path that penetrates original text 106, the transmission image strip " T " that contains the image data that penetrates original text 106 enters probe 30, changeable speculum 304 is inserted light path becomes focal imaging camera lens 308 with reflection and transmission image strip " T " incident image strip " I ", the outgoing image strip " C " of focal imaging camera lens 308 is incident to light-dividing device 310, becomes two image beam splitting " C1 " and " C2 " back difference focal imaging in two ccd array 316 and 318 by its beam split.
The framework with single focal imaging camera lens of comparison diagram 9 and the framework of Fig. 3 with double focusing imaging lens, both have identical original text 110, transparent platform 104, the light source 100 and curved reflector 102 of penetrating, and ccd array 316 and 318 is equivalent to ccd array 216 and 218, changeable filter 312 and 314 is equivalent to changeable filter 212 and 214, light-dividing device 310 is equivalent to light-dividing device 200, and probe 30 is equivalent to probe 20; Main difference is that the light-dividing device 310 of Fig. 9 is to place after the focal imaging camera lens 308, so image beam splitting " C1 " is equivalent to transmission image beam splitting " T1 " and " T2 " with " C2 ".
Be familiar with those of ordinary skill in the art when understanding, Fig. 9 of the 8th embodiment is similar at Fig. 3 of the scanning motion process that penetrates original text 106 and first embodiment, does not repeat them here.
Therefore, one ccd array 316 of the feature of present embodiment and 318 can be with capturing two images that independently penetrate original text 106 behind scanning motion respectively, be familiar with those of ordinary skill in the art when understanding, via reaching the operation mode that aforesaid three kinds of users can select with the 3rd embodiment, the 5th embodiment and the similar detailing of the 7th embodiment and default: M2. penetrates original text-image reparation, M4. penetrate original text-twice definition, M6. penetrate original text-high dynamic range, do not repeat them here.
Secondly, the framework of key diagram 9 is at the light path of reflection original text 110, the light source 100 that penetrates original text 106 with scanning is identical, the light source 300 of scanning reflection original text 110 also is made up of a CCFL or visible light source similar with it and an IR-LED, its incident beam " E3 " passes the surface reflection of transparent platform 108 backs at reflection original text 110, the reflected image light beam " R3 " that contains the image data that reflects original text 110 returns probe 30 again, incident image strip " I " via stationary mirror 302 reflections becoming focal imaging camera lens 308, changeable speculum 304 is to shift out light path under the operator scheme of reflection original text, the outgoing image strip " C " of focal imaging camera lens 308 is incident to light-dividing device 310, becomes two image beam splitting " C1 " and " C2 " back difference focal imaging in two ccd array 316 and 318 by its beam split.
Therefore, the framework of Fig. 9 is very similar with the light path that penetrates original text 106 at reflection original text 110, difference only is the formation source of the incident image strip " I " of focal imaging camera lens 308, the former is formed by the stationary mirror 302 aforesaid reflected image light beams of reflection " R3 ", the latter is formed by the changeable speculum 304 aforesaid transmission image strips of reflection " T ", that is to say that light source 300 and stationary mirror 302 have replaced light source 100 and changeable speculum 304, so be familiar with this skill person when understanding, Fig. 9 is similar with the scanning motion process that penetrates original text 106 at reflection original text 110, does not repeat them here.
Be familiar with those of ordinary skill in the art when understanding, in one embodiment, the increase and decrease of visual actual design demand or change stationary mirror and changeable speculum in the scanner of Fig. 9 in light path quantity and the position with turnover reflection original text or the image light path that penetrates original text directly.
Therefore, one of feature of present embodiment is that two ccd array 316 and 318 can be with capturing two images that independently reflect original text 110 behind scanning motion respectively, can reach the operation mode that aforesaid three kinds of users can select: M1. reflection original text-image reparation via some detailings and default, M3. reflect original text-twice definition, M5. reflects original text-high dynamic range.
The M1. reflection original text-image reparation operation mode of present embodiment at first is described, the CCFL of light source 300 or visible light source similar with it and IR-LED light simultaneously, two changeable filters 312 and 314 are inserted light path, filter 312 and 314 is respectively visible light and infrared light filter, therefore ccd array 316 and 318 scans the visible light of reception reflection original text 110 and the reflected image data of infrared light respectively, therefore, the image data via image processing technique comparison visible light and infrared light can detect the heterogeneous point (dust that reflects on the original text, pollutant, or scratch) image fault that causes; Can store or export after repairing its image fault.
The M3. reflection original text-twice definition operation mode of present embodiment then is described, light source 300 is only lighted CCFL or visible light source similar with it, and two changeable filters 312 and 314 shift out light path, ccd array 316 is similar to 218 to the ccd array 216 of the 4th embodiment to 318 configuration, that is ccd array 316 and 318 has identical number of pixels and pixel distance, and the relative displacement that on its length direction, has the half-pixel distance, and the staggered data that store ccd array 316 and 318 of scanner, identical with the staggered mode that stores ccd array 216 and 218 of the scanner of the 4th embodiment, do not repeat them here.
The M5. reflection original text-high dynamic range operation mode of present embodiment is described at last, light source 300 is only lighted CCFL or visible light source similar with it, and two changeable filters 312 and 314 shift out light path, the control signal of initialization system makes ccd array 316 have the different time for exposure of length with the scan line of 318 pairs of reflection original texts 110, ccd array 316 and 318 is obtained the scan-image of the different reflection original text 110 of time for exposure length respectively, handle and synthesize both image datas again by image software, short image data of time for exposure is partly adopted in the clear zone of resultant image, and long image data of time for exposure is partly adopted in the dark space of resultant image.
Be familiar with those of ordinary skill in the art when understanding, scanner and the scan method thereof with two ccd array and single focal imaging camera lens of the present invention also can be implemented with individual other framework at penetrating original text and reflecting original text respectively.
Can understand that by above explanation principal character of the present invention is that two ccd array are to capture two contribution images independently during with a scanning motion respectively, two kinds of frameworks that can have double focusing imaging lens or single focal imaging camera lens are implemented, after cooperating some detailings and default, the present invention can be different operation mode carry out three kinds of special functions: a. image is repaired, b. twice definition, the c. high dynamic range; And the present invention can be integrated into the framework that single scanning penetrates original text and reflection original text, also can implement with individual other framework at penetrating original text and reflecting original text respectively.
Therefore, scanner with two ccd array of the present invention and scanning thereof and the image treatment method quality that can effectively reduce sweep time and promote scan-image.
Above-described embodiment only is explanation technological thought of the present invention and characteristics, its purpose is familiar with those of ordinary skill in the art and can be understood content of the present invention and implement according to this making, when not limiting claim of the present invention with it, all variation that is equal to or modifications of doing according to disclosed spirit must be encompassed in the claim of the present invention.
Claims (80)
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610077693 CN101035183A (en) | 2006-03-07 | 2006-04-28 | Scanner with dual charge-coupled element array and scanning method thereof |
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| CN200610059631.6 | 2006-03-07 | ||
| CN200610059631 | 2006-03-07 | ||
| CN 200610077693 CN101035183A (en) | 2006-03-07 | 2006-04-28 | Scanner with dual charge-coupled element array and scanning method thereof |
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| CN101035183A true CN101035183A (en) | 2007-09-12 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103067669A (en) * | 2011-10-24 | 2013-04-24 | 丽智科技股份有限公司 | Control system for integrating multiple groups of sensing plane data |
| CN103581488A (en) * | 2012-07-19 | 2014-02-12 | 全友电脑股份有限公司 | Scanning device and method |
| CN105657211A (en) * | 2014-10-06 | 2016-06-08 | 虹光精密工业股份有限公司 | Dual mode scanning device |
| US9473670B2 (en) | 2014-04-30 | 2016-10-18 | Avision Inc. | Peripheral with image processing function |
| CN107347122A (en) * | 2016-05-05 | 2017-11-14 | 鹤立精工股份有限公司 | Wide-area high-resolution line scanning method and module thereof |
| CN109664018A (en) * | 2018-12-24 | 2019-04-23 | 中国科学院西安光学精密机械研究所 | A kind of double light path debugging conjunction beam method and system |
| CN113225479A (en) * | 2021-04-28 | 2021-08-06 | 京东方科技集团股份有限公司 | Data acquisition display system and image display method |
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- 2006-04-28 CN CN 200610077693 patent/CN101035183A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103067669B (en) * | 2011-10-24 | 2016-08-10 | 丽智科技股份有限公司 | Control system for integrating multiple groups of sensing plane data |
| CN103067669A (en) * | 2011-10-24 | 2013-04-24 | 丽智科技股份有限公司 | Control system for integrating multiple groups of sensing plane data |
| CN103581488A (en) * | 2012-07-19 | 2014-02-12 | 全友电脑股份有限公司 | Scanning device and method |
| CN103581488B (en) * | 2012-07-19 | 2016-04-20 | 全友电脑股份有限公司 | Scanning device and method |
| US9473670B2 (en) | 2014-04-30 | 2016-10-18 | Avision Inc. | Peripheral with image processing function |
| CN105657211B (en) * | 2014-10-06 | 2019-02-12 | 虹光精密工业股份有限公司 | Dual Mode Scanning Device |
| CN105657211A (en) * | 2014-10-06 | 2016-06-08 | 虹光精密工业股份有限公司 | Dual mode scanning device |
| CN107347122A (en) * | 2016-05-05 | 2017-11-14 | 鹤立精工股份有限公司 | Wide-area high-resolution line scanning method and module thereof |
| CN107347122B (en) * | 2016-05-05 | 2019-08-16 | 鹤立精工股份有限公司 | Wide-area high-resolution line-scanning method and its modules |
| CN109664018A (en) * | 2018-12-24 | 2019-04-23 | 中国科学院西安光学精密机械研究所 | A kind of double light path debugging conjunction beam method and system |
| CN109664018B (en) * | 2018-12-24 | 2019-12-03 | 中国科学院西安光学精密机械研究所 | A method for combining beams with two optical paths |
| CN113225479A (en) * | 2021-04-28 | 2021-08-06 | 京东方科技集团股份有限公司 | Data acquisition display system and image display method |
| CN113225479B (en) * | 2021-04-28 | 2023-05-12 | 京东方科技集团股份有限公司 | Data acquisition display system and image display method |
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