CN1842119A - Fast scanner with rotatable mirror and image processing system - Google Patents
Fast scanner with rotatable mirror and image processing system Download PDFInfo
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- CN1842119A CN1842119A CN 200610065999 CN200610065999A CN1842119A CN 1842119 A CN1842119 A CN 1842119A CN 200610065999 CN200610065999 CN 200610065999 CN 200610065999 A CN200610065999 A CN 200610065999A CN 1842119 A CN1842119 A CN 1842119A
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Abstract
A scanner for obtaining an image of an object placed on an at least partially transparent platform, wherein the platform has at least a first scan area and a second scan area. The scanner includes a white area formed at least partially around the edge portions of the platform with a plurality of markers, one rotatable mirror, one or more image sensors. In scanning, each partial image from each of the scan areas includes an image of at least one portion of the plurality of markers. An image processing system uses the image of the at least one portion of the plurality of markers in each of the consecutive partial images as a reference to combine the consecutive partial images so as to form a substantially complete image of the object corresponding to a full scan of the first scan area and the second scan area.
Description
The application is that the denomination of invention of submitting on October 7th, 2004 is the U.S. Patent application 10/960 of " FAST SCANNER WITH ROTABLEMIRROR AND IMAGE PROCESSING SYSTEM (fast scanner with rotatable mirror and image processing system) ", the application that continues of 791 part, at this full content of quoting this application as a reference.Simultaneously, this application number is 10/960,791 U.S. Patent application requires to enjoy the inventor and is respectively 60/510 respectively at the application number of submitting on October 10th, 2003, on December 19th, 2003 and on May 19th, 2004,185,60/531,249,60/572, the priority of 639 U.S. Provisional Patent Application, at this full content of quoting these applications as a reference.The application also requires to enjoy denomination of invention that the applicant submits on April 1st, 2005 priority for the U.S. Provisional Patent Application 60/667,034 of " FAST SCANNER WITH ONEROTATABLE MIRROR AND IMAGE PROCESSING SYSTEM (fast scanner with rotatable mirror and image processing system) ".
At this list of references of quoting the various public publications that comprise patent, patent application these lists of references are described as the reference catalogue and in specification of the present invention.Provide to these lists of references to quote and/or discuss only be in order to make specification of the present invention more clear and be not to recognize that these lists of references are " prior aries " of the present invention as described herein.Be incorporated herein in this manual that introduce and full contents all lists of references of discussing as a reference, and with regard to degree as introducing each list of references individually as a reference.
Technical field
The present invention relates to a kind of image-scanning device, relate in particular to and a kind ofly utilize at least one imageing sensor and be used at least one rotatable mirror of high speed image scanning and utilized the image-scanning device that is used to carry out the known image that high speed image handles.
Background technology
At present, use two types image-scanning device that paper spare document is converted to electronic image usually.First type is flatbed scanner, and its scanning is positioned over flat clear glass or the document on the plastic front board.Second type is paper feeding scanner, and it by presenting documentation page to scan with being positioned at one page of shallow slot (thin slot) on the scanner.Current, the image scanning speed of paper feeding scanner is usually faster than the speed of flatbed scanner.In flatbed scanner, a key factor of restriction sweep speed is the mechanical translational speed of probe in the scanner.The exert an influence level of vibration of flatbed scanner picture quality of the quick front and back of probe and beginning stop motion meeting.In flatbed scanner,, can use rotatable mirror as scanning mechanism as the replacement of probe.
For the flatbed scanner as commercialization, important is when keeping the scope that exposes thoroughly, thereby the vertical dimension that reduces flatbed scanner makes scanner have the physical appearance of " approaching ".A kind of mode that addresses this problem is to use a plurality of rotatable mirrors, and each rotatable mirror wherein scans the zones of different of described sweep limits to obtain the scanner design of " approaching ".This method at application number be have in 10/960,791 the U.S. Patent application disclosed.
Therefore, have a kind of like this demand in the prior art and promptly use less rotatable mirror, be preferably a rotatable mirror, with the mechanical device structure of simplifying flatbed scanner and the cost that reduces flatbed scanner.
The invention provides a kind of less rotatable mirror that in flatbed scanner designs, uses, be preferably the technical scheme of using a rotatable mirror.
Summary of the invention
According to one aspect of the present invention, the present invention relates to the scanner of the target image on a kind of platform that is used to obtain to be positioned over partially transparent at least.This at least the platform of partially transparent have first scanning area and second scanning area, and each first scanning area and second scanning area have first edge and second edge respectively.
Described scanner has light source.This scanner also has and is used for receiving described light and described light being reflexed at least one rotatable mirror of two flat or crooked stationary mirrors along second direction from first direction.As shown in Figure 2, advance to illuminate the target on the platform 9 that is positioned at described partially transparent at least along third direction from described light flat or that crooked stationary mirror reflects.With reference to Fig. 2, described first direction is from speculum 4 to rotatable mirror 5, described second direction is from rotatable mirror 5 to stationary mirror 7 or 8, and described third direction is for from the target of static mirrors 7 or 8 to the top surface 76 of the platform 9 that is positioned at described partially transparent at least.The part light that target reflection from described platform 9 goes out to advancing, and arrives described flat or crooked stationary mirror 7 or 8 along the four directions, and wherein this four directions is to opposite with described third direction or opposite substantially.Be reflected into five direction to the light that receives at speculum 7 or 8 from the four directions, wherein the 5th direction is opposite with described second direction or opposite substantially.The light of advancing along the 5th direction is reflected into the 6th direction at rotatable mirror 5 places again, the 6th direction is opposite with described first direction or opposite substantially, and may also have further mirror reflects and pass condenser lens or lens subassembly 3, finally arrive the optical line transducer 2 of scanner.Line sensor 2 receives image light and the output signal of telecommunication corresponding to the target image that receives from described target.With reference to Fig. 2, below the part light of the target image of indicating to scan that will go out from the target reflection on the platform 9 is called image light and its corresponding light path is called the image light path.The image light path originates from the target on the platform 9 and ends at imageing sensor.
And, this scanner can have such as other stationary mirrors of 13 among Fig. 2 and 14 to receive the illumination beam from light source 11, thereby after these mirror reflects, the existing image light path of the light path of illumination beam is aimed at substantially and is opposite with the image direction of light or approaching opposite.
With reference to Fig. 2, rotatable mirror 5 and flat or crooked stationary mirror 7 or 8 are set, with in rotation during this rotatable mirror, thus this rotatable mirror make the second direction of irradiates light change from stationary mirror 7 or 8 reflect and the corresponding light order of advancing along third direction and continuously scanning be arranged in the parts of images of the target of first scanning area and second scanning area.When rotatable mirror rotates, along the four directions to image light scanning place target on the platform 9.Can be that the different images that the image processing system in the part of described scanner or the stand alone computer system that resides in the scanner outside with form of software will be recorded in wherein makes up to form the complete substantially image of described target.With reference to Fig. 2, the rotation of rotatable mirror 5 has realized irradiates light scanning and image light scanning continuously simultaneously in first scanning area and the second scanner zone.
With reference to Fig. 6, in one embodiment, described at least one light source, at least one rotatable mirror and at least one imageing sensor are set so that first direction and the 6th direction limit first jiao, 180 °-β, second direction and the 5th direction limit second jiao, 180 °+β, and third direction and four directions are to limiting third angle, 180 °-β+α, wherein the β value is in-20 ° to 20 ° scope, and α has the value between-10 ° to 10 °.When the rotation of at least one rotatable mirror, thereby described at least one rotatable mirror changes the second direction of light makes the continuous part image of irradiates light sequential scanning target.In the scan period of scanning area, β is a steady state value and α depends on the shape of the reflecting surface of speculum 7 and 8.If speculum 7 and 8 is flat mirror, then α=0.If speculum 7 is crooked mirror, then can change when the value of image light from speculum 7 reflex time α in scan period.Similarity relation also is present between the value of the shape of speculum 8 and α.
According to a further aspect, with reference to Fig. 2, the platform 9 of described partially transparent is at least limited by the marginal portion and has first scanning area and second scanning area at least.The marginal portion of platform 9 comprises the white portion of the one or more continuous part with a plurality of marks or long indicia patterns.This mark or long indicia patterns are arranged in the precalculated position of white portion and in the precalculated position of white portion and can discern.In one embodiment, at least a portion of this white portion is as reference white, and its image is used for the reference white benchmark by the image processing system of scanner.This method also comprises the step of the continuous part image of sequential scanning target, wherein the image that one of comprises in a plurality of parts of a plurality of marks or long indicia patterns at least of each continuous part image.And, this method be included in a plurality of marks of using in each continuous part image at least one of them image at least of one of them or long indicia patterns as benchmark making up this continuous part image, thereby form complete image corresponding to the target of the full scan of first scanning area and second scanning area.This use step also comprises the distortion of proofreading and correct formed target image and prunes the image of white portion and mark or long indicia patterns respectively from target image, thereby obtains non-distortion and the complete image of target.
Although under the situation of the scope that does not break away from spirit disclosed herein and novel concept, description of the preferred embodiment of the present invention can make these and other aspect of the present invention become clear in conjunction with the drawings.
Description of drawings
Figure 1 shows that the perspective view of the rotatable mirror based on scanner of the present invention;
Figure 2 shows that the schematic side elevation of scanner shown in Figure 1;
Figure 3 shows that the schematic, bottom view that has the platform of partially transparent at least of the white portion that comprises a plurality of marks according to an embodiment of the present invention;
Figure 4 shows that the schematic diagram of combination of two parts of images that utilizes the image of common indicium according to an embodiment of the present invention;
Figure 5 shows that block diagram according to the scanner image processing workflow of an embodiment of the present invention;
Fig. 6 (1) is depicted as the schematic diagram at the angle between first direction on the light path and the 6th direction;
Fig. 6 (2) is depicted as the schematic diagram at the angle between second direction on the light path and the 5th direction;
Fig. 6 (3) be depicted as third direction on the light path and four directions between the schematic diagram at angle;
Figure 7 shows that the position between the curved reflection surface of irradiation light path 71-73 and image light path 74-72 and stationary mirror 7 and the schematic diagram of angle;
Figure 8 shows that an execution mode of light source assembly;
Figure 9 shows that at irradiation light path 71, tetanic reflection light path 91, the image light path 72 and being used to that connect and stop the tetanic schematic diagram that connects the angle between the retardance piece 96 that reverberation 91 directly enters optical image sensor shown in Figure 22;
Figure 10 shows that the optical splitter 105 that has half reflection and a translucent surface 106 by utilization uses the camera 101,102 with different optimum focusing scopes to catch the method for identical image;
Figure 11 shows that different cameras different optimal accumulated scopes and and concern schematic diagram between the deck roof surface 76 of partially transparent at least; And
Figure 12 shows that a kind of execution mode schematic diagram of structure of the cover of described rotatable mirror.
Embodiment
With reference to accompanying drawing, similar Reference numeral is represented similar parts in whole accompanying drawing.As employed in the description here and the claim subsequently, unless other clear indication is arranged in context, the meaning of " (a) ", " (an) " and speech such as " described (the) " comprises a plurality of contents of mentioning.And, as employed in the description here and the claim subsequently, unless other clear indication is arranged in context, " ... in (in) " the meaning comprise " ... in (in) " and " ... last (on) ".Embodiments of the present invention are described below with reference to accompanying drawings.
The scanner of mentioning in this specification comprises the scanning means of flat image reading apparatus, photocopier and the device of " the multiple fax of scanner-printer-duplicating etc. " one.
Figure 1 shows that the perspective view of an embodiment of the present invention.Scanning means 1 has image line transducer 2, condenser lens or lens subassembly 3, stationary mirror 4, is positioned at the rotatable mirror (not shown) of light shield 6 inside, two stationary mirrors 7 and 8, the platform 9 and the housing 10 of partially transparent at least.
Figure 2 shows that the schematic side elevation of scanning means shown in Figure 1.Fig. 2 also shows an execution mode of illumination subsystem, and this illumination subsystem comprises light source 11, condenser lens or lens subassembly 12, stationary mirror 13,14 and 4, rotatable mirror 5 and two stationary mirrors 7 or 8.Fig. 2 also shows line image transducer 2 and condenser lens or lens subassembly 3.
With reference to Fig. 2, lens 12 are cylindrical lens or lens subassembly, and lens 3 are image focusing lens or lens subassembly.
At work, the irradiates light that is sent by light source 11 passes lens or lens subassembly 12, reflects on stationary mirror 13,14 and 4 and arrives rotatable mirror 5 along first direction.During image scanning, speculum 5 is along the axle rotation of platform 9 that is arranged essentially parallel to partially transparent at least and line image transducer 2.In certain angular range, reflected by rotatable mirror 5 and along the surface of second direction scanning reflection mirror 7 or speculum 8 from the irradiates light of first direction.The irradiates light that is reflected by speculum 7 or 8 arrives the target on platform 9 top surfaces 76 that place partially transparent along third direction.
The image light that target reflection from platform 9 top surfaces 76 that place partially transparent at least goes out along the four directions to arriving stationary mirror 7 or 8.Then, image light arrives rotatable mirror 5 from speculum 7 or 8 reflections and along the 5th direction, arrive stationary mirror 4 and, pass the final receiving track imageing sensor 2 of condenser lens or lens subassembly 3 backs along the 6th direction then by stationary mirror 4 reflections.Light shield 6 prevents to spill from the light of rotatable mirror 5 platform 9 and direct irradiation operator's eyes in the image scanning operation.
Whenever image light derives from the zone that has the arrowband shape on the platform 9 in scanning, below be referred to as the picture strip zone.This picture strip zone is substantially parallel with the rotating shaft of speculum 5.Whenever irradiates light illuminates the zone that has the arrowband shape on the platform 9 in scanning, below be referred to as the irradiation region.The rotation of speculum 5 makes the picture strip zone and shines the edge, region mobile on platform 9 perpendicular to the direction of the rotating shaft of speculum 5.
With reference to Fig. 2, this scanning means has two scanning areas.The left side that is positioned at rotatable mirror 5 is that the right side that first scanning area is positioned at rotatable mirror 5 is second scanning area.First scanning area has first edge and second edge and second scanning area and also has first edge and second edge.Second edge of first scanning area and first edge of second scanning area are slightly overlapping.The lap of described scanning area roughly is positioned at the centre of whole scanning area and is positioned at rotatable mirror 5 tops.By using stationary mirror 7 and 8, the present invention allows a rotatable mirror not only to scan first scanning area but also scan second scanning area.
Fig. 1 and Fig. 2 show one embodiment of the present invention.Under the situation that does not break away from spirit of the present invention, can carry out various modification to this design.As embodiment, in another embodiment, light source 11 can be positioned at the below of imageing sensor 2.In an execution mode again, light source 11 and imageing sensor 2 can leave from the intermediate section of scanner in the horizontal direction, thereby make speculum 7 and 8 be positioned under the position of light source 11 and imageing sensor 2, to allow in speculum 7 and 8 and bigger vertical range between the platform 9 of partially transparent at least.In another execution mode, light source 11 can place level one side of rotatable mirror 5, and line image transducer 2 places the horizontal opposite side of rotatable mirror 5.Fig. 1 and Fig. 2 only show various possible different execution modes one of them.
Fig. 2 shows the angle that exists between the part 4-3-2 of irradiation part 14-4 of light path and image light path.Because irradiation light path and image light path use mutually speculum 4,5,7 or 8 on the same group, above-mentioned angle between two light paths also is present in the other parts of described light path.
With reference to Fig. 2, the irradiation light path in part 4-5 along first direction and the image light path among the part 5-4 along the 6th direction.Shown in Fig. 6 (1), from the angle of first direction to the six directions be (180 °-β), wherein β has steady state value and in-20 ° to 20 ° scope in scan period.Irradiation light path in light path 5-7 or 5-8 part along second direction and the image light path in the part of light path 7-5 or 8-5 along the 5th direction.Shown in Fig. 6 (2), from the angle of second direction to the five directions be (180 °+β).From speculum 7 or 8 to the irradiation light path of target along third direction and from the target to the speculum 7 or 8 image light path along the four directions to.If speculum 7 and 8 is a plane mirror, then from third direction to the four directions to angle be (180 °-β).If speculum 7 is the curved surface speculum, then shine the surface that light path and image light path can arrive speculum 7 at the diverse location place, from third direction to the four directions to angle be (180 °-β+α), wherein-10 °≤α≤10 ° and α can change in scan period.
With reference to Fig. 7, it shows along the irradiates light of second direction through irradiation light path 71 and is reflected into along the third direction of light path 73 at speculum 7 places, and 77 places arrive the platform 9 of partially transparent at least in the position.The irradiates light irradiation concentrates on the narrowband region at 77 places, position, promptly shines the region.The irradiation region has a width, thereby also shines the narrowband region that concentrates on 78 places, position on the platform 9, i.e. the picture strip zone.Its part irradiates light that receives of target reflection on the picture strip zone.This light that reflects is represented the image and the following image light that is referred to as of described target.Image light along the four directions to the 5th direction that is reflected into through image light path 74 and at speculum 7 places along light path 72.This image light finally arrives imageing sensor 2.Fig. 7 amplifies center 77 and 78 diverse locations that can be positioned on the platform 9 that show irradiation region and picture strip zone respectively.
Figure 8 shows that an execution mode of light source assembly, it launches the illumination beam 71 of enough arrowbands.With reference to Fig. 8, the various elements of frame 84 supporting light sources assemblies.The light that is sent by light source 11 is reflected cover 85 gatherings to form directed light belt.Directed light belt passes lens 83 and 82, via the light beam 71 of opening 81 with enough arrowbands of being formed for shining the target that will scan.
Figure 9 shows that the light path schematic diagram upon deployment in the device, that is, and when launching fully when allowing these light paths not utilize any speculum.Because all light paths are through on the same group speculum mutually, so the position of various light paths and the relation of angle when being illustrated in use a plurality of speculum illustrated in figures 1 and 2 with reference to the relationship description of the position of various light paths shown in Figure 9 and angle.With reference to Fig. 9, irradiates light sends from light source 11, through lens or lens subassembly 12 and via irradiation light path 71 so that 94 places arrive the surface 92 of the platform of partially transparent at least in the position.Surface 92 can be the top surface 76 of platform 9 or this basal surface 75 of the platform of partially transparent at least.No matter under any situation, the description of being done is identical.
The image light path is from the position 93 of surface on 92, advances, passes condenser lens or lens subassembly 3 to enter imageing sensor 2 along image light path 72.The catoptrical part of the irradiates light that image light is just advanced along light path 71.At the certain position place of scan period, irradiates light is positioned at or almost is positioned at the vertical direction on surface 92.With reference to Fig. 7, this situation takes place when light path is positioned at or almost is positioned at the vertical direction of platform 9.In this position, because incidence angle equals the principle of angle of reflection, 94 origins and can be advanced entering imageing sensor 2 along light path 91 by the tetanic reverberation that connects that irradiates light produces from the position below are called the tetanic reflection light path that connects with light path 91.Expectation prevents that this tetanic reverberation that connects from entering imageing sensor.
Because the use of condenser lens or lens subassembly 3, have only the image light of position 93 origins from the surface 92 can focus on imageing sensor 2 sharp.The small angle of imageing sensor 2 has alleviated along tetanic connect that reflection light path 91 advances tetanic and has connect can the be annihilated influence of the optical signalling that received by imageing sensor 2 of reverberation.
Alternatively, can place opaque retardance piece 96 on the reflection light path 91 and enter imageing sensor 2 tetanic connecing to stop the tetanic reverberation that connects that originates from 94 places, position on the surface 92.With reference to Fig. 2, retardance piece 96 can be positioned at the position near image light path 3-4 or image light path 4-5.With reference to Fig. 9, in one embodiment, can with the retardance piece 96 make firm and opaque disk with two holes, one of them hole be used to allow image light along image light path 72 by and another hole be used to allow irradiates light along the irradiation light path 71 pass through.In another embodiment, retardance piece 96 can be made firm and opaque strip shape body, this strip shape body is between irradiation light path 71 and image light path 72.When irradiates light almost perpendicular to surperficial 92 the time, describedly tetanicly connect reverberation 95 places arrive the retardance piece and are blocked in the position.Retardance piece 96 can be coated with the light absorbing material of black.In other embodiments, retardance piece 96 also can have many other shapes and material.All these execution modes of retardance piece 96 allow irradiates lights along irradiation light path 71 by and image light pass through along image light path 72, and stop along tetanic and connect the tetanic reverberation that connects that reflection light path 91 is advanced.
In order to reduce from the top surface of the platform 9 of partially transparent or the intensity of reflected light of lower surface at least on the scanner, the top surface of platform 9 or lower surface can be coated with anti-reflection coating.
The software calibration of good image that can use the target of utilizing software processes and recovering to be scanned is with curved surface and many other speculums in this device and the manufacturing defect of lens of compensatory reflex mirror 7 and 8.Can after carrying out hardware unit, carry out software calibration.Specifically, the table top that can place partially transparent at least by the paper that will have good ruling to be to scan, and uses software processes will scan the back then and the ruling image that is out of shape returns to good ruling identical on original paper and realizes software calibration.After finishing dealing with, can store the result who handles into scanner or store in the computer system relevant in order to use later on scanner.
Fig. 3 shows the upward view of the platform 9 of partially transparent at least.Wherein Reference numeral 16 expressions center on the white portion at platform 9 edges basically.At least a portion of this white portion 16 must have reference white, and its image is proofreaied and correct to carry out shading in image processing as the reference white benchmark by imaging system.
Be used for that image fault is eliminated and the image processing system use of parts of images combination on white portion 16 mark or the image of long continuous label pattern 17.In shading was proofreaied and correct, mark can be used for the position of identified areas.
Fig. 4 shows two width of cloth parts of images 41 and 42, and wherein another width of cloth is obtained by second scanning area width of cloth by the acquisition of first scanning area.Image processing system according to the image 44 of mark on the image 43 of the white band on the parts of images or long indicia patterns so that these parts of images " stitchings " are arrived together.After image processing is finished, the image 43 of white portion and the image 44 of mark are pruned away from the image of combination.
Fig. 5 shows a kind of schematic diagram of execution mode of the workflow of image processing system of the present invention.As shown in Figure 5, when parts of images being scanned into system, this system extracts characteristics of image at first in step 51 from this different images at system entry 50.Described feature comprises the information such as the position of marking image.Amount, position and the shape of the feature help system recognition image distortion of this extraction and in whole scan image the uneven distribution of luminous intensity.This image processing system also carries out shading correction and distortion to be eliminated at step 52 place.At step 53 place, marking image auxiliary down, the uneven different images " stitchings " of having eliminated distortion and having proofreaied and correct shading is arrived together.Then, carrying out shading at step 54 place proofreaies and correct to guarantee the uniformity of entire image luminous intensity.At last, prune white portion and the marking image that is positioned on the image border at step 55 place.Can the workflow of above-mentioned image processing system be set and also can comprise other step that is used to improve final processed images quality according to different order.
With reference to Fig. 2, in the ideal case, the platform 9 of the target that support will scan is curved surface.Yet in the device that reality is used, platform 9 has flat surface.Therefore, with reference to Fig. 2, should be provided with above-mentioned by platform 9, a plurality of speculums 7,8,5,4, the optical system of lens 3 and imageing sensor 2 to be having the enough depth of field, thereby allows the whole zone of the top surface 76 of platform 9 to be arranged in the depth of field of above-mentioned optical system.
With reference to Figure 10, additional or optionally, optical splitter 105 is placed on the light path 4-3.Optical splitter 105 will reflex to speculum 104 from the part optical energy of image, and reflex to second condenser lens or the lens subassembly 103 and second imageing sensor 102 from speculum 104.Below lens 3 and imageing sensor 2 are called camera 101 and lens 103 and imageing sensor 102 are called camera 102.With reference to Figure 11 and ignore little range error, curve 110,111,112,113 and 114 is with respect to all equidistant curve of the transducer in camera 101 and 102.All targets between curve 110 and 114 in the scope are all in the focal length of camera 101 or 102.The optimum focusing distance of supposing camera 101 is curve 111.For camera 101, all targets between 110 and 112 in the scope are all enough clear, perhaps in other words, and all in the field depth of camera 101, perhaps in other words, all in the optimum focusing scope of camera 101.The optimum focusing distance of supposing camera 102 is curve 113.For camera 102, all targets between curve 112 and 114 in the scope are all enough clear, perhaps in other words, and all in the depth of field of camera 102, perhaps in other words, all in the optimum focusing scope of camera 102.
Two optimum focusing scopes of two cameras are spatially adjacent one another are.Any point on the top surface 76 of the platform 9 of described partially transparent at least or fall in the optimum focusing scope of camera 101 or fall in the optimum focusing scope of camera 102.Therefore, the top surface 76 of whole scanning area covers and is divided into two zones by two zones.One of them zone falls in the optimum focusing scope of camera 101, below is referred to as the focal zone of camera 101, and another zone falls in the optimum focusing scope of camera 102, below is referred to as the focal zone of camera 102.
Need and to merge into an image by two images that camera 101 and 102 receives.When merging two images, if scan in the focal zone of camera 101, then the image that is received by camera 101 is arranged the image that merges.If scanning is in the focal zone of camera 102, then the image that is received by camera 102 is arranged the image that merges.
Set the numerical value of the electrical signal intensity of the luminous intensity that v1 (p) expression receives corresponding to the specified point p place camera 101 of the target on platform 9, and set the numerical value of v2 (p) expression corresponding to the electrical signal intensity of the luminous intensity of identical point p place camera 102 receptions of the target on the platform 9.Can use formula v (p)=f (v1 (p), v2 (p)) to calculate the combined diagram picture at the signal value v of a p (p), wherein f is the function of two variablees.When p is in the focal zone of camera 101, the value of value v1 (p) domination v (p) and when p was in the focal zone of camera 102, value v2 (p) arranged the value of v (p).Here, domination means that the value of v (p) is mainly by v1 (p) or v2 (p) decision and approaching with the value of v1 (p) or v2 (p).A kind of execution mode of function f is v (p)=v1 (p) * (1-θ (p))+v2 (p) * θ (p), and wherein θ (p) is function and the 0≤θ (p)≤1 of p.When p was in the focal zone of camera 101, θ (p) was approaching or equal 0.When p was in the focal zone of camera 102, θ (p) was approaching or equal 1.
The method of two images that these two cameras of the structure of two cameras of this use and merga pass obtain doubles the depth of field of whole device effectively.
In another embodiment, two cameras can be placed on the horizontal both sides of rotatable mirror.
In an execution mode again, two cameras can be placed on level one side of rotatable mirror and light source be placed on the horizontal opposite side of rotatable mirror.
Usually, set k 〉=1, if the image and these cameras that use k camera to catch the same scan zone are provided with above-mentioned camera 101 and 102 similar modes, then the image that obtains by these cameras can merge according to following.
Set the numerical value of the electrical signal intensity of the luminous intensity that vi (p) expression receives by camera i at specified point p place corresponding to the target on platform 9, i=1,2 ..., k.Can use formula v (p)=f (v1 (p), v2 (p) ..., vk (p)) and calculate the signal value v (p) of the combined diagram picture at any point p place on the top surface of the platform of partially transparent at least, wherein f is the function of k variable.When p is in the focal zone of camera i, the value of value vi (p) domination v (p).Here, domination mean v (p) value mainly by vi (p) decision and with the value of vi (p) near or equate.A kind of execution mode of function f be v (p)=v1 (p) * θ 1 (p)+v2 (p) * θ 2 (p)+... + vk (p) * θ k (p), wherein θ i (p) is function and the 0≤θ i (p)≤1 of p.When p was in the focal zone of camera i, θ i (p) was approaching or equal 1, i=1, and 2 ..., k, and θ 1 (p)+θ 2 (p)+θ 3 (p)=1.
When using k camera and each camera to have the optimum focusing scope, and these optimum focusing scope is adjacent one another are when being provided with, the optimum focusing scope after the combination of these k camera has the effective depth of field that is substantially equal to all camera depth of field sums.
Then, will look like to be combined as complete image from the combined diagram of first scanning area and second scanning area.
This image processing system can be embodied as firmware physically in the scanning means, perhaps with its some or all of be embodied as in the stand alone computer system of scanning means outside resident and the operation software systems.
Although several and optional execution mode of the present invention has been described here, but should be appreciated that, for the person of ordinary skill of the art, do not break away from the above-mentioned specification of the present invention and below under the situation of the disclosed scope in secret of claim, can also necessarily change.And above-mentioned the present invention also is not intended to scope of the present invention is limited in disclosed key element.
Figure 12 shows that a kind of execution mode schematic diagram of the nontransparent cover 6 of described rotatable mirror 5.Cover 6 is extended with additional non-transparent part 121 and 122 to reduce the light quantity of the dispersion in the scanner.Part 6,121 and 122 can be coated with the light absorbing material of the light quantity of further reduction dispersion.
Claims (12)
1, a kind of scanner that is used to obtain to place the target image on the translucent at least platform, wherein this translucent at least platform has first scanning area and second scanning area, and each first scanning area and second scanning area have first edge and second edge respectively, and described scanner comprises:
A) at least one light source is used to launch irradiates light;
B) at least one rotatable mirror is used for receiving described irradiates light and described light being reflexed to second direction from first direction;
C) the first flat or crooked stationary mirror and the second flat or crooked stationary mirror, be arranged near and the both sides of described each rotatable mirror, for the whole process rotation of described rotatable mirror, reflect at this first and second stationary mirror continuously from the light of second direction from rotatable mirror;
D) be reflected to the parts of images of third direction continuously and respectively at the described first and second stationary mirror places from the light of second direction with the target on first and second scanning areas of the platform that scans described partially transparent at least continuously and respectively, this identical stationary mirror from the four directions to the image light that receives described target and with this image light reflection to the 5th direction, from the image light of the 5th direction by same rotatable mirror reflection to the 6th direction;
E) at least one imageing sensor is used to receive from the parts of images of the target after the scanning of the 6th direction and the output signal of telecommunication corresponding to the sweep test image of the described target that receives; And
F) image processing system is used to receive from the signal of telecommunication of described at least one imageing sensor and with number format and writes down this signal of telecommunication;
Wherein, described at least one light source, at least one rotatable mirror, two stationary mirrors and at least one imageing sensor that are positioned on each rotatable mirror both sides are arranged so that described first direction and the 6th direction limit first jiao, 180 °-β, described second direction and the 5th direction limit second jiao, 180 °+β, and described third direction and four directions are to limiting third angle, 180 °-β-α, wherein β has-20 ° to the 20 ° values in the scope, and when described at least one rotatable mirror rotation, thus described at least one rotatable mirror make the third direction of described light change described light in one or more omnidistance rotation of described rotatable mirror first edge along the first scanning direction A from first scanning area to second edge and scan the parts of images of described target to second continuous edge from first edge along second scanning area of the second scanning direction B; If described second and third direction between light path on stationary mirror be flat mirror, α=0 then; If described second and third direction between light path on stationary mirror be the curved surface mirror, then-10 °≤α≤10 ° and can change in scan period.
2, scanner according to claim 1 is characterized in that, also comprises at least one condenser lens or the lens subassembly that place on the light path between described at least one rotatable mirror and at least one imageing sensor.
3, scanner according to claim 2 is characterized in that, also comprises the device that the irradiates light from described at least one light source is gathered into the light beam of enough arrowbands.
4, scanner according to claim 2, it is characterized in that, also comprise the retardance piece, be used to stop that the tetanic reverberation that connects directly enters described imageing sensor, it places because incidence angle equals the principle of angle of reflection and connects on the catoptrical light path from the top surface of the platform of described partially transparent at least and the tetanic of irradiates light of basal surface reflection.
5, scanner according to claim 2 is characterized in that, also comprises the whirligig that is used to rotate described at least one rotatable mirror.
6, scanner according to claim 2 is characterized in that, described at least one rotatable mirror comprises having the flat mirror or the polygon mirror of at least one reflecting surface.
7, scanner according to claim 2 is characterized in that, the transparent platform of described at least a portion comprise by the individual layer of partially transparent at least or wherein at least one deck be the plate that rigidity or semirigid composite material are made.
8, scanner according to claim 7 is characterized in that, described platform is coated with the coating of antireflection on the side on its surface or both sides.
9, scanner according to claim 2 is characterized in that, this scanner can be used as the image scanning subsystem and is included in photocopier or the multi-function peripheral device.
10, scanner according to claim 2, it is characterized in that, the image light path of same image light is divided into the k bar light path of this k of guiding camera in scan period by utilizing at least one optical splitter, use k camera image light that receives the identical position on the platform that is positioned at described partially transparent at least a time simultaneously in office, k＞1 wherein, yet
A) each camera comprises condenser lens or lens subassembly and line image transducer;
B) each camera has the top surface of the platform of the partially transparent at least that comprises described scanner
The optimum focusing scope of a part; Below this is positioned at described partially transparent at least platform top surface on part be called the focal zone of this camera; And following focal zone with i camera is called i focal zone;
13, scanner according to claim 11, it is characterized in that, when k=2, described function f is taked form v (p)=v1 (p) * (1-θ (p))+v2 (p) * θ (p), wherein θ (p) is smooth function and the 0≤θ (p)≤1 of p, when p is arranged in first focal zone corresponding to v1 (p), θ (p) near or equal 0, when p is arranged in second focal zone corresponding to v2 (p), θ (p) near or equal 1.
14, scanner according to claim 1 is characterized in that, the light shield of described rotatable mirror covers this rotatable mirror, and its angle with preset range leaves the spatial joint clearance that allows image light and irradiates light to pass in and out this cover on this cover.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US66703405P | 2005-04-01 | 2005-04-01 | |
| US60/667,034 | 2005-04-01 | ||
| US60/773,180 | 2006-02-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1842119A true CN1842119A (en) | 2006-10-04 |
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ID=37030953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610065999 Pending CN1842119A (en) | 2005-04-01 | 2006-03-29 | Fast scanner with rotatable mirror and image processing system |
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| Country | Link |
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| CN (1) | CN1842119A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570548A (en) * | 2013-10-25 | 2015-04-29 | 东芝泰格有限公司 | Camera device and target object recognition scanner |
| CN109194842A (en) * | 2018-09-30 | 2019-01-11 | 先临三维科技股份有限公司 | image collecting device |
-
2006
- 2006-03-29 CN CN 200610065999 patent/CN1842119A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104570548A (en) * | 2013-10-25 | 2015-04-29 | 东芝泰格有限公司 | Camera device and target object recognition scanner |
| CN104570548B (en) * | 2013-10-25 | 2017-09-29 | 东芝泰格有限公司 | Camera device and purpose thing identification scanner |
| CN109194842A (en) * | 2018-09-30 | 2019-01-11 | 先临三维科技股份有限公司 | image collecting device |
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