CN100438557C - Image compensating correcting method for light-source fixed scanner - Google Patents
Image compensating correcting method for light-source fixed scanner Download PDFInfo
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- CN100438557C CN100438557C CNB031205518A CN03120551A CN100438557C CN 100438557 C CN100438557 C CN 100438557C CN B031205518 A CNB031205518 A CN B031205518A CN 03120551 A CN03120551 A CN 03120551A CN 100438557 C CN100438557 C CN 100438557C
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- light source
- ray machine
- scanner
- casing
- light
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Abstract
The present invention relates to an image compensating and correcting method which is used for a light source fixed type scanner. A light source of the light source fixed type scanner is fixed in a scanner casing, and a collector is additionally arranged for improving illumination efficiency. A reference board is attached to the inner side surface of the upper wall of the scanner casing for correction and scanning. By providing the light source with a changeable current mode, the image compensating and correcting method make the brilliancy of the light source change along with the positions of the light source fixed type scanner so that each scan line on a file can accept irradiation in the same extent. The method comprises the steps: the light source fixed type scanner is moved to different scanner positions and uses a light source with the fixed brilliancy to scan the reference board so as to generate relative brightness values corresponding to each of the scanner positions. Then, according to each of the relative brightness values, compensating current values corresponding to each of the scanner are calculated. When the scanner carries out general scanning, the scanner can adjusts the current value of the light source according to the compensating current values measured by using the method.
Description
(1) technical field
The relevant a kind of image compensation bearing calibration of the present invention, and particularly relevant a kind of image compensation bearing calibration that is used for the light source fixed scanner
(2) background technology
Along with the arriving of multimedia era, the use of scanner is more prevalent, and the user also improves gradually for the requirement of scanning quality and speed, and the preference of outward appearance body is also tended to compact.
Please refer to Fig. 1, it is the profile of general platform-type scanner.There is-has the image receiving function in the scanner casing 100 and can in scanner casing 100, come and go the ray machine 110 that moves abreast, have light source 120 on the ray machine 110.During scanning, the light that light source 120 sends, for example light 130, and the file 150 on the directive glass platform 140 is reflected by file 150 and enters ray machine 110, receives and be converted to signal of telecommunication output by the light sensitive components in the ray machine 110 (detailed being plotted among the figure) at last.
Because light source is that in all light of launching, it is quite few in fact really to apply to scan Illuminator effectively, causes not little waste with the scattering method irradiation.And because light source is to be disposed on the ray machine, above light source, set up an optical collector to concentrate the light of light source, though can improve the problems referred to above, yet this measure will make the shared volume of whole ray machine (comprising the optical collector of setting up) increase, and run counter to towards mini trend with current design of electronic products.In addition, be fixed in the light source on the ray machine, the heat that discharges during start also will influence the every assembly in the ray machine, for example make the reflector group distortion, or make light sensitive component produce noise or the like.
(3) summary of the invention
In view of this, the invention provides a kind of image compensation bearing calibration of light source fixed scanner, the light source fixed scanner is that light source is fixed in the scanner casing, sets up optical collector again to concentrate light.And its image compensation bearing calibration is the mode of light source one changeable electric current being provided, making light source along with the difference of ray machine position different briliancy be arranged, and then make the degree of illumination that each scan line received on the file all identical.
The above-mentioned purpose according to the present invention, a kind of image compensation bearing calibration of light source fixed scanner is proposed, be before general scanning, carry out correct scan earlier, its step comprises: mobile ray machine is to different ray machine positions, and with one fixedly the light source of briliancy reference plate is scanned, correspond to the relative brightness value of each ray machine position with generation, according to each relative brightness value, calculate the compensation current that corresponds to each ray machine position again.And when ray machine generally scanned, compensation current that can be measured according to said method was then adjusted the size of current of light source.
For above-mentioned purpose of the present invention, characteristics and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. is elaborated as follows:
(4) description of drawings
Fig. 1 is the profile of general platform-type scanner.
Fig. 2 is the profile of light source fixed scanner.
Fig. 3 is the schematic top plan view of Fig. 2.
Fig. 4 is the flow chart according to the image compensation bearing calibration of a preferred embodiment of the present invention.
Fig. 5 is the graph of a relation of ray machine position and relative brightness value.
Fig. 6 is the graph of a relation of ray machine position and compensation current.
(5) embodiment
The image compensation bearing calibration of light source fixed scanner of the present invention, be that light source is fixed in the scanner, other sets up optical collector with the lifting illumination efficiency, and provides light source one changeable electric current, makes the degree of illumination that each scan line received on the file all identical.
Please refer to Fig. 2, it is the profile of light source fixed scanner.Light source 220 is sides that are fixed in close casing 200 in the scanner casing 200, for example place on the lower wall surface 240 of scanner casing, the optical collector 250 that is formed by set of lenses then is disposed near the light source 220, is concentrated into the collimated light beam 233 of proper width in order to the light 231 that light source 220 is sent.Wherein, cooperate the position of light source 220, also can set up an eyeglass (for example speculum 260), light 231 is folded to optical collector 250 places.In addition, dispose a beam direction mirror 270 on the ray machine 210, the collimated light beam 233 of penetrating light-self-collecting device 250 can be folded to file 150.In addition, light source also can be fixed in a side wall surface of scanner casing, and at this moment, optical collector then is disposed between light source and the beam direction mirror, with light in the active set with a suitable distance.
Because light source 220 of the present invention is fixing, when healing from light source 220 positions when far away in ray machine 210 positions, it is longer to expose to the light path that the light on the file 150 passes through, form the optical attenuation phenomenon, therefore the size of current of controlling light source 220 briliancy needs to change to some extent with the position difference of ray machine 210, equates with the degree of illumination of keeping each scan line on the file 150.Please be simultaneously with reference to Fig. 3, it is the vertical view of Fig. 2.Each scan line all can receive equal irradiation on the file 150 in order to make, and attaches the reference plate 290 of a white reflection material in the medial surface place of scanner casing upper wall 280, and adjusts the briliancy of light source 220 with following image compensation bearing calibration.Wherein, reference plate 290 also can be attached at the lateral surface of casing upper wall 280.
Please be simultaneously with reference to Fig. 4, it is the flow chart according to the image compensation bearing calibration of a preferred embodiment of the present invention.At first, in step 410, mobile ray machine then in step 420, is scanned by the fixedly briliancy light source of fixed current control to different ray machine positions to reference plate with one earlier.And then in step 430, ray machine can detect the light by the reference plate reflection on different ray machine positions, and produces the relative brightness value that corresponds to each ray machine position.Please refer to Fig. 5, it to be the ray machine position with institute measure and must the graph of a relation of relative brightness value.The size of relative brightness value and ray machine position are a functional relation, and wherein, the ray machine position is meant with the light source position to be initial point, the ray machine that is corresponded to and the distance of light source.
Then, in step 440, according to each relative brightness value that obtains by step 430, calculate correspond to each ray machine position should supply with the compensation current of light source.Please refer to Fig. 6, it be ray machine position and calculating and the graph of a relation of compensation current.In theory, the relative brightness value and the compensation current that deposit of same light seat in the plane is to be reciprocal relation.
And when ray machine carries out general scanning motion, then can be according to the compensation current of said method gained, at different ray machine positions, adjust the electric current of supplying with light source, the briliancy size of this controlled current system light source, make the relative brightness of each scan line on the reference plate not be subjected to the ray machine position influence, and permanent one-tenth certain value.
What deserves to be mentioned is that image compensation bearing calibration of the present invention can only be made when dispatching from the factory in scanner and be carried out once, or after each scanner start, all once proofread and correct, to keep scanning quality.
The image compensation bearing calibration that the above embodiment of the present invention disclosed, be to be used for the fixed scanner of light source, so that the mode of light source one changeable electric current to be provided, the light source briliancy to be changed along with the ray machine position, and then make the degree of illumination that each scan line received on the file all identical.
In sum; though the present invention is disclosed with a preferred embodiment; yet it is not in order to limit the present invention; any personnel that have the knack of present technique; without departing from the spirit and scope of the present invention; replace when doing various equivalence change or equivalence, so protection scope of the present invention is when looking being as the criterion that accompanying Claim defines.
Claims (8)
1. scanner, in order to scan a file, this scanner has a casing, and comprises at least:
One light source is fixed in this casing the side near this casing, a required light when scanning to be provided, and wherein, the briliancy of this light source is controlled by an electric current;
One optical collector is disposed near this light source, is a collimated light beam in order to concentrate this light;
One ray machine is disposed in this casing, and moves to different ray machine positions to scan in this casing;
One reference plate is attached at this casing upper wall; And
One beam direction mirror is disposed on this ray machine, in order to reflect this collimated light beam to this document and this reference plate;
Before scanning this document, carry out a correct scan earlier, comprise, move this ray machine to different ray machine positions, and with one fixedly the light source of briliancy this reference plate is scanned, make this ray machine on different ray machine positions, sensing is by this light of this reference plate reflection, corresponds to a relative brightness value of each ray machine position with generation, afterwards, this relative brightness value according to corresponding to each ray machine position calculates a compensation current that corresponds to each ray machine position;
Wherein, when this ray machine carried out general scanning motion, pairing this compensation current in the ray machine position during according to this optical mechaical scanning was adjusted the size of this electric current.
2. scanner as claimed in claim 1 is characterized in that this light source is fixed in the side wall surface of this casing, and this optical collector then is disposed between this light source and this beam direction mirror with a suitable distance.
3. scanner as claimed in claim 1 is characterized in that this light source is fixed in the lower wall surface of this casing, and upwards irradiation, and more there is a speculum this light source top, and this light is folded to this optical collector place.
4. scanner as claimed in claim 1 is characterized in that, this optical collector is a set of lenses.
5. scanner as claimed in claim 1 is characterized in that this reference plate is made by white material.
6. scanner as claimed in claim 1 is characterized in that, this reference plate is attached at arbitrary side of this casing upper wall.
7. scanner as claimed in claim 1 is characterized in that this reference plate is attached at the medial surface of this casing upper wall.
8. image compensation bearing calibration, a correct scan that is used for a light source fixed scanner, this light source fixed scanner has a casing, and comprise one at least and be fixed in this casing reference plate and that light source, near a side of this casing is disposed near this light source optical collector, medial surface that a ray machine, is attached at this casing upper wall and be disposed at beam direction mirror on this ray machine, it is characterized in that this image compensation bearing calibration comprises that step is as follows:
(a) move this ray machine to different ray machine positions;
(b) with one fixedly the light source of briliancy this reference plate is scanned, wherein, the briliancy of this light source is subjected to a Current Control, and after being concentrated into a collimated light beam by the light that this light source penetrates by this optical collector, this beam direction mirror of directive, this beam direction mirror then is folded to this collimated light beam to this reference plate;
(c) this ray machine detects this light by this reference plate reflection on different ray machine positions, corresponds to a relative brightness value of each ray machine position with generation; And
(d) according to this relative brightness value, calculate a compensation current that corresponds to each ray machine position corresponding to each ray machine position;
Wherein, when this ray machine generally scans,, adjust the size of this electric current according to pairing this compensation current in this ray machine position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031205518A CN100438557C (en) | 2003-03-11 | 2003-03-11 | Image compensating correcting method for light-source fixed scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031205518A CN100438557C (en) | 2003-03-11 | 2003-03-11 | Image compensating correcting method for light-source fixed scanner |
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| Publication Number | Publication Date |
|---|---|
| CN1531322A CN1531322A (en) | 2004-09-22 |
| CN100438557C true CN100438557C (en) | 2008-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031205518A Expired - Fee Related CN100438557C (en) | 2003-03-11 | 2003-03-11 | Image compensating correcting method for light-source fixed scanner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105492890B (en) * | 2013-02-22 | 2020-05-01 | 生命技术公司 | Method of calibrating an instrument for performing a biological analysis |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5412634A (en) * | 1990-02-16 | 1995-05-02 | Deutsche Thomson-Brandt Gmbh | Optical scanning device for a disc player including improved focusing apparatus |
| US5659533A (en) * | 1996-07-23 | 1997-08-19 | Sampo Corporation | Method of using a single pick-up head to read and store data on discs of different thicknesses and structure of a pick-up head apparatus therefor |
| CN2321022Y (en) * | 1997-05-27 | 1999-05-26 | 力捷电脑股份有限公司 | Automatic focusing device |
| CN1334545A (en) * | 2000-07-13 | 2002-02-06 | 力捷电脑股份有限公司 | Method for correcting scanned image |
-
2003
- 2003-03-11 CN CNB031205518A patent/CN100438557C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5412634A (en) * | 1990-02-16 | 1995-05-02 | Deutsche Thomson-Brandt Gmbh | Optical scanning device for a disc player including improved focusing apparatus |
| US5659533A (en) * | 1996-07-23 | 1997-08-19 | Sampo Corporation | Method of using a single pick-up head to read and store data on discs of different thicknesses and structure of a pick-up head apparatus therefor |
| CN2321022Y (en) * | 1997-05-27 | 1999-05-26 | 力捷电脑股份有限公司 | Automatic focusing device |
| CN1334545A (en) * | 2000-07-13 | 2002-02-06 | 力捷电脑股份有限公司 | Method for correcting scanned image |
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| Publication number | Publication date |
|---|---|
| CN1531322A (en) | 2004-09-22 |
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