CN1731821A - High speed photosensing units for high speed image scanning system - Google Patents
High speed photosensing units for high speed image scanning system Download PDFInfo
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- CN1731821A CN1731821A CN 200410056046 CN200410056046A CN1731821A CN 1731821 A CN1731821 A CN 1731821A CN 200410056046 CN200410056046 CN 200410056046 CN 200410056046 A CN200410056046 A CN 200410056046A CN 1731821 A CN1731821 A CN 1731821A
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Abstract
The invention relates to a high speed optical sensing element which is used for sensing an image light source for a high speed image scanning system. The invention comprises a plurality of units of optical sensing cells, and each optical sensing cell is used for sensing the image of a sensed area and outputting the image data of the sensed area; a plurality of units of self-colored signal processing cells which are used for processing corresponding image data so as to output the corresponding self-colored signals of R, G and B; a plurality of units of registers which are used for storing the self-colored signals of R, G and B outputted by the corresponding self-colored signal processing cells; and an in-phase processing cell which is used for receiving the self-colored signals outputted by the plurality of units of registers and outputting the self-colored signals after synchronizing the plurality of units of self-colored signals.
Description
Technical field
The present invention relates to a kind of high-speed light sensing element, particularly relate to a kind of high-speed light sensing element that is applied to carry out on the device of image scanning high speed image scan.
Background technology
Along with the software and hardware technology of device of image scanning is updated, nearly all device of image scanning can both have certain quality of scanning (that is having enough resolution) at present, can satisfy common people or even professional person's image scan demand for a long time.
Known image-scanning system as shown in fig. 1, is made of a Photosensing Units 100, analog/digital converter 110, a special applications processing unit 120 and an internal memory 130.When carrying out image scan, at first be responsible for the analog image light source of acquisition external image by Photosensing Units 100, then with one group by R, G, the analog signaling that the B primary signal is formed is exported, be that digital signal is exported to special applications processing unit 120 with received analog signal conversion then by analog/digital converter 110, digital signal after handling through special applications processing unit 120 will be stored in the internal memory 130, and by the interface convertor 140 that links with processing terminal 140 last signal of video signal is exported in the processing terminal 140 for follow-up other image processing operation use during machine in due course.
Wherein, special applications processing unit 120 (being commonly referred to as ASIC) mainly is responsible for carrying out the digital signal based process of image, and comprise following few component parts usually: (1) carries out the data switch 121 and the image process unit 122 of image processing; The buffer unit 123 that data when (2) being responsible for image processing is provided are temporary; (3) the output recomposition unit 124 of the ordering of responsible signal of video signal reorganization; And (4) provide the coffret 125 with signal of video signal output.Detailed operation mode in the relevant special applications processing unit 120 between each part has belonged to known technology, just seldom does at this and gives unnecessary details.
Yet as can be known by foregoing, mode is in proper order taked in the overall operation of known image-scanning system, just take man-to-man corresponding relation between Photosensing Units 100, analog/digital converter 110 and the internal memory 130, that is transfer to an analog/digital converter by one group of analog signal that Photosensing Units 100 is exported and carry out the action of conversion of signals, and when the digital signal that stores after special applications processing unit 120 is handled, equally also undertaken by an internal memory 130.
Yet this tupe in proper order but becomes the main bottleneck place that causes present all device of image scanning significantly to promote on sweep speed.Therefore, will be how can satisfy under most of users' the prerequisite at the quality of scanning of device of image scanning, more can further make improvements to promote the speed of image scan at known image-scanning system, will be the topmost development center of gravity of following device of image scanning place.
Summary of the invention
In view of above problem, main purpose of the present invention is to provide a kind of high speed image scan element, to be applied in the high speed image-scanning system, to solve existing problem of known technology or shortcoming.
Therefore, for achieving the above object, high-speed light sensing element disclosed in this invention, in order to sensing one image light source, wherein this image light source is distinguished into a plurality of sensing areas, and corresponds to the many groups of this sensing area output primary signal, includes: N group light sensing unit, each this light sensing unit is in order to this sensing area of sensing, and exports the image data of this optical sensing area; N group primary signal processing unit corresponds to this N group photosensitive unit configuration, in order to handle corresponding this image data, to export corresponding R, G, B primary signal; N organizes buffer, corresponds to this N group primary signal processing unit configuration, in order to store this R, G, the B primary signal that this corresponding this primary signal processing unit is exported; And a synchronous processing unit, join with this N group buffer, in order to receiving this primary signal that this N group buffer is exported, and with this N group primary signal back output synchronously.
Above-mentioned high-speed light sensing element, wherein this light sensing unit can be contact image sensor (CIS).
Above-mentioned high-speed light sensing element, wherein this light sensing unit can be charge coupled cell (CCD).
Above-mentioned high-speed light sensing element, wherein this light sensing unit takes solid-state array mode to arrange.
According to principle of the present invention, high-speed light sensing element disclosed in this invention can be with after the image data shunting that scans, parallel processing again, to accelerate the speed of image processing, therefore, high-speed light sensing element disclosed in this invention has the advantage of accelerating image scan speed.
Detailed features of the present invention and advantage will be described in detail in execution mode, its content is enough to make any personnel that have the knack of correlation technique to understand technology of the present invention and implements according to this, and any advantage related to the present invention and purpose can be understood from disclosed content of this specification and accompanying drawing easily.
Description of drawings
Fig. 1 is known image-scanning system schematic diagram;
Fig. 2 is the circuit block diagram of high-speed light sensing element disclosed in this invention; And
Fig. 3 is an embodiment schematic diagram of using the high speed image-scanning system of high-speed light sensing element disclosed by the invention.
The number in the figure explanation:
100 Photosensing Units
110 analog/digital converters
120 special applications processing units
121 data switches
122 image process units
123 buffer units
124 output recomposition unit
125 coffrets
130 internal memories
140 interface convertors
150 processing terminals
200 high-speed light sensing elements
201 first groups of light sensing units
202 second groups of light sensing units
20N N group light sensing unit
221 first primary signal processing units
222 second primary signal processing units
22N N primary signal processing unit
241 first buffers
242 second buffers
24N N buffer
260 synchronous processing unit
210 analog/digital converters
211 first analog/digital converters
213 second analog/digital converters
230 internal memories
231 first internal memories
233 second internal memories
Embodiment
About feature of the present invention and practical operation, existing conjunction with figs. is described in detail as follows as most preferred embodiment.
Please refer to Fig. 2, be high-speed light sensing element disclosed in this invention, in order to sensing one image light source, wherein this image light source is distinguished into a plurality of sensing areas, and correspond to the many groups of this sensing area output primary signals, include: N group light sensing unit (for example, first group of light sensing unit 201, second group of 202～the N of light sensing unit group light sensing 20N of unit), each this light sensing unit is in order to this sensing area of sensing, and export image data N group primary signal processing unit (the first primary signal processing unit 221 for example of this optical sensing area, the second primary signal processing unit 222, N primary signal processing unit 22N), correspond to this N group photosensitive unit configuration, in order to handle corresponding this image data, to export corresponding R, G, the B primary signal; N organizes buffer (for example first buffer 241, second buffer 242, N buffer 24N), corresponds to this N group primary signal processing unit configuration, in order to store this R, G, the B primary signal that this corresponding this primary signal processing unit is exported; And a synchronous processing unit, join with this N group buffer, in order to receiving this primary signal processing unit that this N group buffer is exported, and with this B group primary signal back output synchronously.
Above-mentioned light sensing unit can be contact image sensor (CIS), also can be charge coupled cell (CCD), and this light sensing unit can take solid-state array mode to arrange.
More than form and be described in detail as follows.
When wanting sensing one file, a predetermined scanning element can be set in scanning means inside, and the file that is scanned is promptly with this predetermined pixel output.In addition, the scanning means inner setting is distinguished into a plurality of sensing areas with this document (i.e. this scanning light source), when scanning means P-SCAN this document, can scan each sensing area and produce corresponding image data by the set a plurality of light sensings of scanning means are first.
For instance, when scanning means P-SCAN this document, owing to be preset with a plurality of sensing areas, for example first sensing area is to the N sensing area, the corresponding light sensing unit that disposes of each sensing area, dispose first group of light sensing unit 201, the second sensing area as first sensing area and dispose the second light sensing unit 202, the rest may be inferred.By the image light source region is divided into a plurality of sensing areas, and, can reach the purpose that the present invention improves sweep speed by different light sensings unit sensings.
Therefore, first group of light sensing unit 201 will export the first group image data of corresponding sensing area, second group of light sensing unit 202 will export the second group image data of corresponding sensing area, the N group light sensing 20N of unit will export the N group image data of corresponding sensing area, and transfer to corresponding primary signal processing unit processes, with output R, G, B primary signal.Therefore, after the first primary signal processing unit 221 receives the first group image data, promptly export first group of R, G, B primary signal through handling, and be stored in first buffer 241.After the second primary signal processing unit 222 receives the second group image data, promptly export second group of R, G, B primary signal through handling, and be stored in second buffer 242.After tricolor signal processing unit 223 receives the 3rd group image data, promptly export the 3rd group of R, G, B primary signal through handling, and be stored in the 3rd buffer 243.
Because the speed of each primary signal processing unit processes signal may be inequality, therefore may cause the signal that is sensed that nonsynchronous phenomenon is arranged, and can't truly present the true appearance of the image light source that is scanned, therefore, R, G, the B primary signal after earlier institute being handled is first temporarily is stored in the buffer.At this moment, synchronous processing unit 260 can be monitored first buffer 241, second buffer 242, to the stored R of N buffer 24N, G, the state of B primary signal, if disposed and when all being stored in the buffer, synchronous processing unit 260 can be with first buffer 241, second buffer 242, to the stored R of N buffer 24N, G, the B primary signal reads out, and organize first buffer 241 with first to N, second buffer 242, to the stored R of N buffer 242, G, the back output synchronously of B primary signal is handled by follow-up treatment system again.
In order fully to prove the exploitativeness of high-speed light sensing element of the present invention, below will illustrate that by an embodiment the present invention operates situation, sees also Fig. 3 again.
Following default prerequisite is arranged among this embodiment, comprising: outside picked image light source has two groups of light sensing units in 200 pixels, the high-speed light sensing element 200 (promptly first group light sensing unit 201 and second groups of light sensing units 202), have that two analog/digital converters (i.e. first analog/digital converter 211 and second analog/digital converter 213) are that the transducer control unit is controlled in the analog/digital converter 210, have two internal memories (i.e. first internal memory 231 and second internal memory 233) to be memory control unit in the memory group 230 controls.
At first, will be by 201 and second groups of light sensing unit 202 while and average 200 image light sources of acquisition pixels of first group of light sensing unit in the high-speed light sensing element 200, therefore the analog signal of the 1st to the 100th pixel will be handled and be exported by first group of light sensing unit 201, and the analog signal of the 101st to the 200th pixel will be handled and be exported (in the present embodiment by second group of light sensing unit 202, all comprise R in every group of analog signal simultaneously, G, three kinds of primary signals of B, but the design by different high-speed light sensing elements 200 also can make and only has R in every group of analog signal in fact, G, three kinds of primary signals of B one of them).
Under the control of transducer control unit, first group of analog signal that light sensing unit 201 is exported, to be received by first analog/digital converter 211, and second group of analog signal that light sensing unit 202 is exported, to be received by second analog/digital converter 213, and in the mode of parallel processing all analog signals all are converted to and export special applications processing unit 120 to after the digital signal and (export the digital signal of the 1st to the 100th pixel by first analog/digital converter, and export the digital signal of the 101st to the 200th pixel, but also can take non-mode one to one to carry out) according to the setting of transducer control unit by second analog/digital converter.
Digital signal enters into after the special applications processing unit 120, it mainly is the program of being responsible for carrying out the image processing of digital signal by data switch 121 and 122 two parts of image process unit, after disposing, (take the mode of mean allocation in the present embodiment with being responsible for controlling all digital signals are distributed to be stored in first internal memory 23 1 and second internal memory 233 by memory control unit again, therefore the digital signal of the 1st to the 100th pixel will be stored in first internal memory 231, the digital signal of the 101st to the 200th pixel then is stored in second internal memory 233, takes the mode of non-mean allocation to carry out but also can set according to memory control unit).
At last, to be stored in digital signal in each internal memory according to the 1st, the 101st, the 2nd, the 102nd by memory control unit again ... order in internal memory, take out, and the output recomposition unit 124 that offers special applications processing unit 120 is carried out the reorganization ordering operation of complete output image signal, at last with whole signal of video signal to put in order normally, promptly the 1st, the 2nd, the 3rd ... the the 1 99, the 200th order is exported to processing terminal 150 by being connected between coffret 125 and the interface convertor 140, finishes the operation of whole high speed image scan.
High-speed light sensing element disclosed in this invention can be with after the image data shunting that scans, parallel processing again, and to accelerate the speed of image processing, therefore, high-speed light sensing element disclosed in this invention has the advantage of accelerating image scan speed.
Though the present invention with aforesaid preferred embodiment openly as above, yet it is not in order to limit the present invention.Without departing from the spirit and scope of the present invention, change of being done and retouching all belong within the scope of patent protection of the present invention.
Claims (4)
1. high-speed light sensing element, in order to sensing one image light source, wherein this image light source is distinguished into a plurality of sensing areas, and corresponds to the many groups of this sensing area output primary signals, and this Photosensing Units comprises:
N group light sensing unit, each this light sensing unit be in order to this sensing area of sensing, and export the image data of this optical sensing area;
N group primary signal processing unit corresponds to this N group photosensitive unit configuration, in order to handle corresponding this image data, to export corresponding R, G, B primary signal;
N organizes buffer, corresponds to this N group primary signal processing unit configuration, in order to store this R, G, the B primary signal that this corresponding this primary signal processing unit is exported; And
One synchronous processing unit joins with this N group buffer, organizes this primary signal that buffer is exported in order to receive this N, and with this N group primary signal back output synchronously.
2. high-speed light sensing element as claimed in claim 1, wherein this light sensing unit is a contact image sensor.
3. high-speed light sensing element as claimed in claim 1, wherein this light sensing unit is a charge coupled cell.
4. high-speed light sensing element as claimed in claim 1, wherein this light sensing unit takes solid-state array mode to arrange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410056046 CN1731821A (en) | 2004-08-05 | 2004-08-05 | High speed photosensing units for high speed image scanning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410056046 CN1731821A (en) | 2004-08-05 | 2004-08-05 | High speed photosensing units for high speed image scanning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1731821A true CN1731821A (en) | 2006-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410056046 Pending CN1731821A (en) | 2004-08-05 | 2004-08-05 | High speed photosensing units for high speed image scanning system |
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|---|---|
| CN (1) | CN1731821A (en) |
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