CN1328308A - Method and device for locating scan start point of image scanner - Google Patents
Method and device for locating scan start point of image scanner Download PDFInfo
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- CN1328308A CN1328308A CN 00118121 CN00118121A CN1328308A CN 1328308 A CN1328308 A CN 1328308A CN 00118121 CN00118121 CN 00118121 CN 00118121 A CN00118121 A CN 00118121A CN 1328308 A CN1328308 A CN 1328308A
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Abstract
A device for locating the scan start point of image scanner is composed of scan platform with the first wide edge as X axis and the first long edge as Y axis, light source carrier moving along Y axis, and markers for expressing different Y coodinates. Its method includes such steps as choosing one of markers as reference point, getting the direction vector between the start point of image to be scanned and reference point, moving light source carrier to reference point, moving the light source carrier from the reference point to the start point of image, and begining to scan.
Description
The present invention relates to a kind of localization method and device thereof of scan start point of device of image scanning, particularly a kind of method and the device thereof of a plurality of reference point that utilize so that the image scan starting point of high accurancy and precision demand is located.
Along with the arriving of multimedia era, the use of image scanner is more prevalent, and the user is for the also raising gradually of requirement of scanning quality and speed.Wherein, if can begin to carry out scanning motion, just can promote the speed of scanning document with moving to the file scan starting point by reference position fast and effectively in order to light carrier aircraft (carriage) in the image scanner as image capture.Tradition utilizes the initial location of image scan to carry out the method for image scan, includes following several mode:
(a) with reference to Fig. 1, in No. the 147499th, Taiwan patent announcement, its angle of cut that uses a reflector space 12 is as a reference point P, the action that positions.The mode of its location is, because before dispatching from the factory, the relative position of reference point P and scan start point Q is proofreaied and correct and is fixed, so, as long as the light carrier aircraft obtains after the position of reference point P, just can learn the position of scan start point Q, and can move to scan start point Q, begin to carry out scanning motion.
B) with reference to Fig. 2, in No. the 338868th, Taiwan patent announcement, the action that it uses an indicia patterns 22 to position.When obtaining any two reference point P1 on the indicia patterns 22 and P2, just can according to two coordinates of reference points positions, funtcional relationship, with the preset length of indicia patterns and scan start point, obtain the position of scan start point Q, and reach the effect of location, to carry out scanning motion.
But, for scanning area only is certain specific region in the file, if the same words of only using the starting point of scan start point Q when carrying out scanning motion, when the light carrier aircraft moves to zone to be scanned at scan start point Q, can be because the machine error between the transmission speed instability of motor, actuated element to each other or the driving error of light carrier aircraft etc., cause a little the error of getting for the image starting point in zone to be scanned.And, when zone to be scanned far away more from scan start point, its error that may cause is big more, generally speaking the point tolerance of getting that moves to the image starting point of distant place scanning area by scan start point Q is about 2mm (millimeter), when getting a demand accurately the time, the above-mentioned nearly point tolerance of getting about 2mm just becomes unacceptable and needs the problem of solution badly.
In view of this, purpose of the present invention just provides a kind of device of image scanning, has a plurality of icon marks on the direction that the light carrier aircraft is advanced, in order to a plurality of reference point to be provided.Different reference point can be utilized at different scanning areas, reducing getting point tolerance, increasing the degree of accuracy of scan-image of scan start point, and the speed of short scan can be added.
According to purpose of the present invention, a kind of locating device of scan start point of device of image scanning is proposed, comprising: scanning platform, light carrier aircraft (carriage) is with a plurality of marks.Wherein, scanning platform is in order to place image to be scanned, and its first broadside is an X-axis, and the first long limit is a Y-axis.The light carrier aircraft is positioned at device of image scanning inside, is moved along Y direction by start line, in order to capture the image of file to be scanned.And a plurality of marks that are positioned at scanner inside, in order to representing different Y coordinate figures respectively, the reference point when capturing the image of file to be scanned as the light carrier aircraft.
According to purpose of the present invention, a kind of localization method of scan start point of device of image scanning is proposed in addition, wherein, device of image scanning comprises scanning platform, light carrier aircraft (carriage), and a plurality of mark.Scanning platform is in order to place file to be scanned, and its first broadside is an X-axis, and the first long limit is a Y-axis.The light carrier aircraft is positioned at device of image scanning inside, is moved along Y direction by start line, in order to capture the image of file to be scanned.And be positioned at the inner a plurality of marks of this scanner, in order to represent different Y coordinate figures respectively, this localization method comprises: at first, one of a plurality of marks of selected the most approaching file to be scanned are reference point.Then, obtain the image starting point of file to be scanned to the direction vector between the reference point.At last, mobile light carrier aircraft is to reference point, and is starting point with the reference point, the light carrier aircraft is moved to the image starting point after, begin to scan file to be scanned.
In the method for the invention, direction vector be (x, y), when coordinates of reference points be (xn, in the time of yn), the coordinate of this image starting point be (xn+x, yn+y).
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and in conjunction with the accompanying drawings, be described in detail below;
The simple declaration of accompanying drawing:
Fig. 1 has illustrated the localization method synoptic diagram of traditional device of image scanning.
Fig. 2 has illustrated the localization method synoptic diagram of another tradition as scanister.
Fig. 3 illustrates a kind of device of image scanning upper viewing view that utilizes a plurality of reference point location image scan starting point according to a preferred embodiment of the present invention.
Fig. 4 illustrates the process flow diagram according to the localization method of the scan start point of a kind of device of image scanning of a preferred embodiment of the present invention.
Fig. 5 A～5E has illustrated the various marker graphic synoptic diagram of mark group block among Fig. 3.
With reference to Fig. 3, it illustrates a kind of device of image scanning upper viewing view that utilizes a plurality of reference point location image scan starting point according to a preferred embodiment of the present invention.
Present embodiment is to be that example explains with platform scanner device (Flatbed Scanner).General platform scanner device comprises a transparent scanning platform 302, for example is to make with glass, and its upside is in order to placing file 304 to be scanned, and its outside is a casing 308.Comprise a smooth carrier aircraft (carriage) 306 in platform scanner device inside, among light carrier aircraft 306, include light source, the reflecting optics group, lens, reach optical detection device or the like (not being shown among the figure), in order to emission light and capture the image of file 304 to be scanned, optical detection device wherein for example be charge coupled cell (Charge Coupled Device, CCD).Include a plurality of marks 310 in scanner one side, in order to reference point as when scanning.
Now first broadside with scanning platform 302 is defined as X-axis, for example is leading edge 312, and first of scanning platform 302 is grown the limit be defined as Y-axis, for example be lateral margin 314.Its direction is shown in X arrow among the figure and Y arrow.Because leading edge 312 is a quadrature with lateral margin 314, so can utilize leading edge 312 and lateral margin 314 to define an X-Y plane, the just plane of scanning platform 302.X-axis and Y-axis intersect part and are defined as initial point O (0,0), and any point in the scanning platform 302, its X, Y coordinate figure be on the occasion of.The light carrier aircraft is moved along the Y direction by start line 316 beginnings, and its direction of motion can be the direction of positive Y, can also be the direction of negative Y.All marks form a mark group block 318, and the relative position of each mark in the mark group block 318 and this initial point O is the fixed value of calibrated mistake before being and dispatching from the factory, that is the coordinate figure of these marks is fixed value.For example the coordinate figure of mark 310 is for fixing.
Wherein, X, Y coordinate are to be unit with pixel (pixel), and for example directions X can be done calculating by the storage unit in the charge coupled device (cell) number, and the Y direction is to control with the revolution step number.
Now the X coordinate figure with the mark in the mark group block 318 is all identical, and place second lateral margin of scanning platform 302, be that example is done explanation for example with lateral margin 320, in fact implement to need this restriction when of the present invention, the X coordinate figure of the mark in the mark group block 318 can be different, as long as determine the relative position relation of itself and initial point O before dispatching from the factory.The Y coordinate figure of the mark in the mark group block 318 can on the occasion of, also can be negative value.Be on the occasion of situation be that all marks all are positioned at the below of scanning platform 302 leading edges 312; And be that the situation of negative value is to allow some mark be positioned at the top of leading edge 312.Move because the direct of travel of light carrier aircraft 306 is positive dirctions of Y-axis in the past, can also move toward the negative direction of Y-axis, so, when selected marker is reference point, might not need to limit mark must be positioned at the Y coordinate figure on the occasion of the position on.
With reference to Fig. 3 and Fig. 4, wherein to illustrate be process flow diagram according to the localization method of the scan start point of a kind of device of image scanning of a preferred embodiment of the present invention to Fig. 4.It at first is step 402, device of image scanning carries out the action of prescan (pre-scan) earlier, if do not carry out the action of prescan, then image scanner begins scanning by initial point O (0,0), that is uses lower resolution to scan file 304 to be scanned in advance, the image of file to be scanned is presented with lower resolution, this is the prescan image, so that the user utilizes the selected zone that will scan of prescan image, also is image 322 to be scanned.Image 322 to be scanned comprises an image starting point 324 and an image terminal point 326, and its coordinate figure can be learnt after selecting image 322 to be scanned by the user.Starting point when wherein, image starting point 324 scans for beginning to treat scan-image 322.
Then, enter step 404, the image to be scanned 322 that software sets according to the user, a mark in the selected mark group block 318 that is suitable for image 322 to be scanned most is as reference point.For example the mark 328 of the most close selected image starting point 324 is as reference point.Then, entering step 406, obtain the direction vector of reference point to 324 of the image starting points of image 322 to be scanned, for example is the direction vector of mark 328 to image starting point 324.And the direction vector of gained be (x, y).Wherein, the X coordinate that the x value equals image starting point 324 deducts the X coordinate of mark 328, and the Y coordinate that the y value equals image starting point 324 deducts the Y coordinate of mark 328.
At last, enter step 408, hold in the mouth mobile light carrier aircraft, also be mark 328 pairing second start lines 329 to reference point.And be second starting point with reference point, again the light carrier aircraft is moved y unit, just move on to the formed scanning start line of ordinate 330 places of image starting point 324, then begin to scan image 322 to be scanned.So, just, can obtain the scan-image of pinpoint accuracy.
As shown in Figure 3, suppose the user to set the zone that will scan be image starting point 324 zone of a rectangle image 322 to be scanned being centered on image terminal point 326, then can select the mark 328 of an image starting point 324 the most close as reference point.Wherein, the coordinate of image starting point 324 is (x
1, y
1), the coordinate of sweep stopping point 326 is (x
2, y
2), the coordinate of mark 328 is (x
3, y
3).Because the coordinate of mark 328 just is defined as (x before scanning
3, y
3), so (x
1, y
1) and (x
3, y
3) between direction vector can learn via calculating.This moment its direction vector be (x, y), x=x wherein
1-x
3, y=y
1-y
3When then light carrier aircraft 306 will begin to carry out scanning motion, can directly move to second start line, 329 places, be reference point with mark 328 again, toward moving down y unit, arrives scanning start line 330, and obtain (x
1, y
1) the position, begin to scan.That is, can be from (x
1, y
1) bottom-right zone begin to scan.
So, required computing time in the time of also can reducing light carrier aircraft 306 and move, and reach the effect of quick scanning.For example in the conventional practice, need originally to move to (x from O (0,0)
1, y
1), it is y that the Y direction of required calculating moves the revolution step number
1-0=y
1And the present invention only needs from mark (x
3, y
3) move to (x
1, y
1), the revolution step number of its required calculating is y
1-y
3So utilize technical characterictic of the present invention, when scanning motion began to carry out, motor was that the light carrier aircraft is directly moved to mark (x
3, y
3) pairing second start line 329 of reference point, begin again to calculate from mark (x
3, y
3) move to (x
1, y
1) required mobile rotation step number, thereby be able to fast and the action that scans effectively.
The present invention can obtain the scan-image of pinpoint accuracy, now lifts an example and does explanation.It is all identical to suppose that the light carrier aircraft moves the mistiming rate.If the light carrier aircraft moves the error of each coordinate unit and is 0.001 unit, if selected mark 328 coordinate (x
3, y
3) be (580,720), image starting point 324 coordinate (x
1, y
1) be (500,800), in conventional practice with initial point O (0,0) be in the practice of reference point, the light carrier aircraft moves to image start line 330 by initial point O (0,0), its Y coordinate is 800, because moved 800-0=800 coordinate unit, then its error that may cause is 800
*0.001=0.8 individual coordinate unit.If with mark 328 is reference point, then light carrier aircraft 306 is a 800-720=80 coordinate unit from the distance that mark 328 pairing second start lines 329 move to image start line 330, and then its error that may cause is 80
*0.001=0.08 individual coordinate unit, the error that it caused are greatly less than the error that is caused when the reference point with initial point O (0,0).
Wherein, the generation of this error may be because transmission speed instability, the external interference of motor, or comes between actuated element to each other the machine error or the driving error of light carrier aircraft or the like.
Because the present invention is very high for the setting accuracy of scan start point, so needing to be particularly suitable on the image scan of pinpoint accuracy for example multiple scanning of image.Need for example be the opportunity of multiple scanning:
(1) proceeds to half when scanning, but must suspend scanning, then carry out again scanning second time when finishing whole scanning process because of storer is not enough.
(2) utilize in conjunction with (Merge) multiple scanning image to improve the scanner of scan-image quality, its practice is, scanned after the selected image to be scanned for the first time, the mode of available mechanical adjustment, with the distance of light carrier aircraft toward directions X translation half-pixel (pixel), and then multiple scanning once.So, if the result of twice scanning is got up in conjunction with (Merge), can make the image analytic degree that combines become original twice.For example, be the image scanner of resolution 600dpi (dot perinch) originally, utilize said method, after scanning for the first time, obtain the image of a 600dpi; With light carrier aircraft translation half-pixel, sweep the image that once obtains another 600dpi more again, and former and later two images half-pixel that just staggers; Afterwards with twice scanning result combination, and obtain the image scan result of a resolution 1200dpi.Yet; owing to utilize the mode of mechanical adjustment only with light carrier aircraft translation half-pixel; distance is very little; as long as the little by little error of light carrier aircraft in moving process; promptly may influence scanning result widely, the situation of point tolerance more than 2mm of getting of scan-image usually takes place still more, when for example the same image of same position being scanned; resulting result finds to have the situation of slur picture in overlapping back regular meeting.So if the desire utilization gets up the result of twice scanning in conjunction with (Merge), improving image analytic degree, scanner itself is to the calculating of scan start point and obtain, also do not allow error too the great talent can reach.Because the degree of accuracy height of device of image scanning of the present invention, so also can satisfy the situation of these needs multiple scannings, the same image scan N (N is a positive integer) that more can utilize the method to repeat same position is inferior, as long as each time scanning all is taken as the error of 1/N pixel, again with each scanning result combination (Merge) with raising image scan resolution.
The production method of mark can have a variety of, now lifts an example doing explanation, and implements not limit by this when of the present invention.A plurality of label sets are synthesized mark group block 318, and mark group block 318 can use on-deformable material to make, and for example is plastic cement etc.Be pasted on the inboard of casing 308 then near scanning platform 302.Generally speaking, because the scanning platform 302 that glass is made is to be fixed on the casing 308,, the effect of protection mark group block 318 is arranged more so so also mark group block 318 can be placed between glass and the casing 308.Because when making, a plurality of marks must be fixed with respect to the coordinate of initial point, so must strictly note the position of being pasted during binding mark group block 318.The another kind practice is that at casing 308 inboard design one grooves, its size and mark group block 318 in order to place mark group block 318, can guarantee that so more mark group block 318 is fixed on the desired position together.
With reference to figure 5A～5E, it illustrates is the various marker graphic synoptic diagram of mark group block 318 among Fig. 3.
Shown in Fig. 5 A, marker graphic can be a linear, and vertical with the Y direction, and the color of straight line for example is a black, and background color for example is a white.The end points that can select straight line is as reference point, and the light carrier aircraft then directly moves to selected reference point, moves to begin on the scan start point to scan again.
Shown in Fig. 5 B, marker graphic can be rectangle, and one of four angles can selecting rectangle are reference point, and as mentioned above, the light carrier aircraft is directly to move to selected reference point, moves to begin on the scan start point to scan again.
Shown in Fig. 5 C, marker graphic can be isosceles right triangle, isosceles right triangle two one of equilateral be parallel with directions X, and another two one of equilateral be parallel with the Y direction, can be with in the equilateral triangle, the summit that the Y coordinate figure is bigger is a reference point.As long as when the light carrier aircraft is scanned up on the equilateral triangle, just can learns light carrier aircraft and reference point distance easily, and make the light carrier aircraft to move on the scan start point apace.Be example with selected C point during as reference point now, when the light carrier aircraft moved to sweep trace 502, the light carrier aircraft can detect the position that A point and B order and learn the distance of line segment AB.Because line segment AB and line segment AC are equidistant, so can learn distance between AC by the length of line segment AB.At this moment, the position that therefore can learn reference Point C.Method thus, the light carrier aircraft can move to apace and begin on the scan start point to scan.
Shown in Fig. 5 D, it can be specific functional digraph, for example is the para-curve figure, be example when now moving to sweep trace 504 with the light carrier aircraft, in like manner as can be known, the light carrier aircraft can be after detecting D point and E point, the position of learning reference point F by the specific funtcional relationship of point-to-point transmission.And make the light carrier aircraft promptly be moved on the position identical with the Y coordinate of reference point F, and being moved to apace, the light carrier aircraft begins on the scan start point to scan.
Shown in Fig. 5 E, marker graphic can be cruciform, can be reference point with criss-cross right-angled intersection point, and as mentioned above, the light carrier aircraft is directly to move to selected reference point, moves to begin on the scan start point to scan again.
The disclosed device of image scanning of the above embodiment of the present invention can have good degree of accuracy, gets an effect as long as the design by simple mark just can reach splendid scanning.Can make the scanning of image more accurate, very strong advantage is arranged in various application, for example reduce getting point tolerance, increasing the resolution of scan-image of scan start point, and can add the speed etc. of short scan.
In sum; though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when can doing various changes and retouching, so protection scope of the present invention should be with being as the criterion that claims scope is defined.
Claims (20)
1. the localization method of the scan start point of a device of image scanning, wherein, this device of image scanning comprises the one scan platform, and in order to place a file to be scanned, first broadside of this scanning platform is an X-axis, and the first long limit of this scanning platform is a Y-axis; One smooth carrier aircraft is positioned at this device of image scanning inside, is moved along Y direction by a start line, in order to capture the image of this file to be scanned; And a plurality of marks, be positioned at this scanner inside, in order to represent different Y coordinate figures respectively, this localization method comprises:
(a) one of those marks of selected the most approaching this file to be scanned are a reference point;
(b) obtain an image starting point of this file to be scanned to the direction vector between this reference point; And
(c) move this light carrier aircraft to this reference point, and be a starting point with this reference point, this light carrier aircraft is moved to this image starting point after, begin this file to be scanned of scanning.
2. localization method as claimed in claim 1, wherein this direction vector is that coordinate figure for this image starting point deducts this coordinates of reference points value.
3. localization method as claimed in claim 2, in step (b), this direction vector be (x, y), when this coordinates of reference points is (x
n, y
n) time, then the coordinate of this image starting point is (x
n+ x, y
n+ y).
4. localization method as claimed in claim 3, in step (c), this light carrier aircraft is x by the X-axis coordinate
n+ x place begins scanning.
5. localization method as claimed in claim 1, wherein the Y coordinate figure of the described mark of part is for negative.
6. localization method as claimed in claim 1, wherein said mark are to place on the one second long limit of this scanning platform.
7. localization method as claimed in claim 1, the X coordinate figure of wherein said mark is identical.
8. localization method as claimed in claim 1, wherein, X-axis and Y-axis intersection point are an initial point, this image starting point be in this scan-image near initial point a bit.
9. the localization method of the scan start point of a device of image scanning, wherein, this device of image scanning comprises the one scan platform, and in order to place a file to be scanned, first broadside of this scanning platform is an X-axis, and the first long limit of this scanning platform is a Y-axis; One smooth carrier aircraft is positioned at this device of image scanning inside, is moved along Y direction by a start line, in order to capture the image of this file to be scanned; And a plurality of marks, be positioned at this scanner inside, in order to represent different Y coordinate figures respectively, this localization method comprises:
(a) this file to be scanned is carried out prescan to obtain an image to be scanned;
(b) one of described mark of selected the most approaching this image to be scanned is a reference point;
(c) obtain one of this image to be scanned image starting point to the direction vector between this reference point; And
(d) move this light carrier aircraft to this reference point, and be a starting point with this reference point, this light carrier aircraft is moved to this image starting point after, begin this image to be scanned of scanning.
10. the locating device of the scan start point of a device of image scanning comprises:
The one scan platform, in order to place a file to be scanned, first broadside of this scanning platform is an X-axis, the first long limit of this scanning platform is a Y-axis;
One smooth carrier aircraft is positioned at this device of image scanning inside, is moved along Y direction by a start line, in order to capture the image of this file to be scanned; And
A plurality of marks are positioned at this scanner inside, in order to representing different Y coordinate figures respectively, and the reference point when capturing the image of this file to be scanned as this light carrier aircraft.
11. locating device as claimed in claim 10, wherein said mark are to place on the one second long limit of this scanning platform.
12. locating device as claimed in claim 10, the shape of wherein said mark are to be linear, and vertical with Y direction.
13. locating device as claimed in claim 10, each mark be shaped as rectangle, wherein, be this reference point with one of four angles of one of those rectangle marked.
14. locating device as claimed in claim 10, each mark be shaped as isosceles right triangle, wherein, described isosceles right triangle two one of equilateral be parallel with directions X, and another two equilateral be vertical with the Y direction, be reference point with the bigger angle of the Y coordinate figure of one of described equilateral right-angle triangle mark.
15. locating device as claimed in claim 10, the shape of each mark are to be cruciform, wherein, are this reference point with the right-angled intersection point of one of those cruciform marks.
16. locating device as claimed in claim 10, wherein this scanning platform is made up of a glass.
17. locating device as claimed in claim 10, wherein said mark are to place on the mark group block.
18. locating device as claimed in claim 10, wherein this locating device also comprises a casing, in order to protect this locating device.
19. locating device as claimed in claim 18, wherein this mark group block is also placed with a groove in this casing inboard, uses so that the position of this mark group block is more fixing.
20. the locating device of the scan start point of a device of image scanning comprises:
The one scan platform, in order to place a file to be scanned, this scanning platform comprises the one scan initial point;
One smooth carrier aircraft is positioned at this device of image scanning inside, in order to capture the image of this file to be scanned; And
A plurality of marks are positioned at this scanner inside, the reference point when capturing the image of this file to be scanned as this light carrier aircraft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001181211A CN1140103C (en) | 2000-06-09 | 2000-06-09 | Method and device for locating scan start point of image scanner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001181211A CN1140103C (en) | 2000-06-09 | 2000-06-09 | Method and device for locating scan start point of image scanner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1328308A true CN1328308A (en) | 2001-12-26 |
| CN1140103C CN1140103C (en) | 2004-02-25 |
Family
ID=4587107
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001181211A Expired - Fee Related CN1140103C (en) | 2000-06-09 | 2000-06-09 | Method and device for locating scan start point of image scanner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1140103C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100413306C (en) * | 2002-12-23 | 2008-08-20 | 三星电子株式会社 | Method and appts. for scaning images |
-
2000
- 2000-06-09 CN CNB001181211A patent/CN1140103C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100413306C (en) * | 2002-12-23 | 2008-08-20 | 三星电子株式会社 | Method and appts. for scaning images |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1140103C (en) | 2004-02-25 |
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Granted publication date: 20040225 Termination date: 20170609 |