EP1452010A2 - Dispositif et un procede pour balayer un document en utilisant le mouvement d'elevation et de rotation d'une camera - Google Patents

Dispositif et un procede pour balayer un document en utilisant le mouvement d'elevation et de rotation d'une camera

Info

Publication number
EP1452010A2
EP1452010A2 EP02803385A EP02803385A EP1452010A2 EP 1452010 A2 EP1452010 A2 EP 1452010A2 EP 02803385 A EP02803385 A EP 02803385A EP 02803385 A EP02803385 A EP 02803385A EP 1452010 A2 EP1452010 A2 EP 1452010A2
Authority
EP
European Patent Office
Prior art keywords
camera
line
scanning
template
scanned
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02803385A
Other languages
German (de)
English (en)
Inventor
Markus Schnitzlein
Arnold Allweier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oce Document Technologies GmbH
Original Assignee
Oce Document Technologies GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE2001157574 external-priority patent/DE10157574A1/de
Application filed by Oce Document Technologies GmbH filed Critical Oce Document Technologies GmbH
Publication of EP1452010A2 publication Critical patent/EP1452010A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
    • H04N1/0282—Using a single or a few point light sources, e.g. a laser diode
    • H04N1/0284—Using a single or a few point light sources, e.g. a laser diode in combination with a light integrating, concentrating or diffusing cavity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
    • H04N1/02845—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array
    • H04N1/02865—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array using an array of light sources or a combination of such arrays, e.g. an LED bar
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
    • H04N1/02845—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array
    • H04N1/0287—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array using a tubular lamp or a combination of such lamps
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/03—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/03—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array
    • H04N1/031—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array the photodetectors having a one-to-one and optically positive correspondence with the scanned picture elements, e.g. linear contact sensors
    • H04N1/0315—Details of scanning heads ; Means for illuminating the original for picture information pick-up with photodetectors arranged in a substantially linear array the photodetectors having a one-to-one and optically positive correspondence with the scanned picture elements, e.g. linear contact sensors using photodetectors and illumination means mounted on separate supports or substrates or mounted in different planes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H04N1/1013—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components
    • H04N1/1026—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components using a belt or cable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/024—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof deleted
    • H04N2201/02493—Additional optical elements not otherwise provided for, e.g. filters, polarising plates, masks or apertures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/0402—Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207
    • H04N2201/0436—Scanning a picture-bearing surface lying face up on a support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/04—Scanning arrangements
    • H04N2201/0402—Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207
    • H04N2201/0456—Arrangements not specific to a particular one of the scanning methods covered by groups H04N1/04 - H04N1/207 for maintaining a predetermined distance between the scanning elements and the picture-bearing surface

Definitions

  • the invention relates to a device for scanning a template, with a support surface on which the template to be scanned rests.
  • the device has a camera provided with an optoelectronic line sensor, which scans the template lying on the support surface line by line and generates electronic signals.
  • the invention relates to a method for scanning a template.
  • Such a device is used to digitize the image content of a template, such as magazines and books.
  • a template such as magazines and books.
  • Such templates are often bound, so that it is necessary to place the template open on a work table and to scan it from above using the principle of incident light.
  • scanning devices which use a camera with a CCD area sensor.
  • CCD area sensors Although such a camera can perform a fast scan, the resolution of the image structures is considerably restricted. At very high resolutions, the CCD area sensors required for this are very cost-intensive. This is why cameras are used that contain a CCD line sensor. Such a camera has a high resolution with high quality and works economically.
  • the camera In the case of conventional scanning with a camera with a line sensor, the camera is located above the original and is moved across the entire document.
  • the disadvantage here is that the camera has to be moved over a relatively long distance and this movement takes place in the headspace of a user.
  • Another disadvantage is that it is difficult to place lighting in such a way that there is no gloss in the image to be scanned which impairs the scanning quality.
  • Another option for scanning is to arrange the camera with the line sensor vertically above the original and to move the lens of the camera so that a larger area of the original is scanned line by line. It is difficult here that the optics must be designed for a large image area, and the imaging area should correspond at least to the diagonal of the maximum original size. There is also the problem of the appearance of gloss on the image structure to be scanned.
  • halogen or fluorescent lamps are often used to illuminate the template.
  • such lamps are disadvantageous in that they show a slow warm-up behavior in which the color and the brightness change, as a result of which the scanning result also changes.
  • the template is exposed to a relatively high level of radiant heat and, in the case of fluorescent lamps, also to UV exposure.
  • Another disadvantage is the fact that such lamps interfere with an operator's work area and can cause a glare effect on the operator.
  • full-area lighting creates with the help of such lamps shine on the original to be scanned with the result of reduced scanning quality.
  • a document reading device is known from EP-A-0 164 713, in which a line camera performs a lifting movement and a rotary movement when scanning line by line. The optical distance between the camera and the document to be read remains essentially constant.
  • a scanner head for scanning originals is known from German patent DE 19 829 776 C1.
  • the distance between the sensor and the template remains essentially the same, for which purpose a four-bar linkage is used.
  • a radiation source which contains a large number of LEDs, is used to illuminate the template.
  • the optics for the camera need only be designed for the length of a line to be scanned on the template, typically for the width of the template. A design of the optics for the entire image diagonal and the entire surface of the template is not necessary. The structure for the camera is accordingly simplified. In addition, the optics can optimally match the constant optical path length be designed so that no optical distortions can arise. Refocusing or changing the scale, as in known scanning systems, is not necessary.
  • the camera is slidably arranged on an arm.
  • the arm is pivotally connected at one end in a fixed axis of rotation to a lifting column.
  • the camera on this arm is also moved at the same time, so that the constant distance from the line to be scanned is maintained.
  • FIG. 1 shows a basic illustration of the device with two camera positions
  • FIG. 2 shows a structure with a single drive motor
  • FIG. 3 shows a structure with two drive motors
  • FIG. 4 shows a structure with a rotating mirror
  • FIG. 5 shows a lighting arrangement with an integrated camera
  • FIG. 6 shows the structure of lighting using LED lines
  • FIG. 7 shows a similar structure in a compact arrangement
  • FIG. 8 shows a further exemplary embodiment with a pivotable arm on which the camera is arranged to be linearly displaceable
  • Figure 9 shows the arrangement of Figure 8 with a spindle-nut combination
  • Figure 10 shows an arrangement with a cam, which causes the linear movement of the camera on the arm
  • Figure 11 shows a further arrangement in which a displaceable screen is used.
  • Fig. 1 shows a schematic diagram for explaining the invention.
  • a template 10 for example a bound book or magazine, lies open on the support surface 12 of a work table 14.
  • an edge of the template 10 is aligned parallel to a reference axis, for example the rear edge 16 of the work table.
  • a camera 20 can be moved along a lifting column 18 which is fastened on the work table 16.
  • the camera 20 contains a lens and an optoelectronic line sensor, generally a CCD line sensor.
  • the line sensor is preferably arranged at a pivot point 22 about which the camera 20 can rotate.
  • the camera 20 is aligned with its lens in such a way that a center beam 24 detects a boundary line 26 to be scanned, which has the maximum distance from the reference axis 16.
  • the direction of the line as well as the arrangement of the linear line sensor in the camera 20 is perpendicular to the paper plane of FIG. 1.
  • the optical path length w between the camera 20 and the boundary line 26 is a constant variable to which the object the camera 20 is set optimally.
  • the optical path length w remains constant and, in the upper position of the camera 20, detects a further boundary line 28 which is at a minimal distance from the reference axis 16.
  • Line-by-line scanning takes place during the movement of the camera 20 from the first position (completely solid lines) to the second position (lines drawn in broken lines), electronic signals being generated for digitizing the image content of the original.
  • the movement is adapted to the area between the boundary lines 26, 28 and can be chosen to be correspondingly larger or smaller on the contact surface 12.
  • the camera 20 only has to be moved by small distances.
  • the movement of the camera 20 is generally outside the area that is accessible to an operator to the right of the boundary line 26.
  • the optics of the camera 20 need only be designed for scanning in the line direction, for example in accordance with the width of the original 10 or the width of the support surface 12, and not for the entire dimensions of the original 10, for example the diagonal of the image. Since the optical path length w remains constant, it is not necessary to refocus the camera. This also means that there are no changes in scale.
  • the optics can be optimally adapted to the path length w and be minimized with regard to distortions.
  • the entire area behind the template 10 is available for the placement of lighting elements. If appropriate lighting elements are arranged, that even with strongly arched originals, such as hardcover books, hardly any gloss reflections.
  • FIG. 2 shows an example using a single drive motor.
  • a lifting device 30 is linearly displaceable along the arrows P6.
  • a spindle 32 is arranged along the support surface 12 and is driven by a drive motor 34.
  • a slide 36 is guided on the spindle 32 and can carry out linear movements in accordance with the arrows P7 shown.
  • the spindle 32 is mounted in a bearing block 38.
  • the lifting device 30 and the sliding carriage 36 are connected to one another by a strut 40, the strut 40 being pivoted in an axis belonging to the pivot point 22.
  • the strut 40 is also rotatably mounted in an axis 42 on the sliding carriage 36. The distance of the strut 40 between points 22 and 42 corresponds to the optical path length w.
  • the camera (not shown in FIG. 2) is arranged on the lifting device 30, the optical axis of the camera being oriented in the direction of the strut 40.
  • the line sensor of the camera is arranged at the level of the pivot point 22.
  • the motor 34 drives the spindle 32 in such a way that the displacement chute 36 in the direction transverse to the line direction of the scanned line has a speed which corresponds to the line feed speed when scanning line by line.
  • the lifting device 30 is also displaced via the strut 40 and the camera is rotated at the pivot point 22.
  • the lower pivot point 42 is preferably arranged in the object plane, ie in the scanning plane for the original 10.
  • the camera performs a lifting movement with respect to the support surface 12 and a rotary movement transverse to the line direction.
  • a drive is connected to the lifting device 30; the sliding carriage 36 then follows the driven movement of the lifting device 30.
  • FIG. 3 shows a further embodiment of the invention.
  • the camera 20 is arranged on a positioning unit 44 which, driven by a spindle 46 and a motor 48, can be moved along the lifting column 18.
  • the positioning unit 44 carries a rotating device 50 which is rotated by a further motor (not shown).
  • a further motor not shown.
  • the position of the camera 20 is set by the two motors so that the distance between the camera 20 and the line currently being scanned is kept essentially constant.
  • the driving curves of the two motors must be coordinated so that the required combined turning and lifting movement is carried out.
  • the advantage of this example according to FIG. 3 lies in the compact structure.
  • FIG. 4 shows a further example in which a mirror 52 which can be rotated about the arrow P1 is arranged on the lifting column 18.
  • the camera 20 is also arranged on the lifting column 18.
  • the mirror 52 is connected in the beam path between the camera 20 and the scanned line.
  • the line feed during scanning is carried out by adjusting the angle of rotation Pl of the rotary mirror 52.
  • the lifting movement can take place either by adjusting the camera 20 in the direction of the double arrow P2 or by adjusting the rotating mirror 52 in the direction of the double arrow P3 shown in dashed lines.
  • the rotating mirror 52 moves in the direction of the double arrow P3, the camera 20 can be permanently installed.
  • an illumination unit is used to illuminate the original 10 during the scanning process, which generates a beam of rays along the line currently being scanned.
  • FIG. 5 shows a preferred exemplary embodiment in which the camera 20 is incorporated in an illumination unit 54.
  • the camera 20 performs a linear movement according to the arrow P4 and a rotary movement according to the arrow P5 around the pivot point 22.
  • the lighting unit 54 rotates simultaneously with the camera 20 about the common pivot point 22 and generates a radiation band 56 which illuminates the current line to be scanned.
  • the properties of the radiation band on the original remain the same during the displacement movement, which means e.g. the brightness curve always remains constant when scanning.
  • FIG. 6 shows an example of an illumination unit 54 for illuminating the template 10 in a cell-like manner.
  • LEDs 60 are arranged on both sides of a circuit board 58 in rows. These LEDs are arranged along a first focal line of two elliptical cylindrical mirror elements 62, 64. These mirror elements 62, 64 focus the radiation into their respective second common focal line 66, which coincide locally and illuminate the line on the original 10.
  • the lighting device 54 shown has a compact structure, since the emission characteristic of the LEDs, which emit radiation only in a half space, is linked to the favorable imaging properties of the elliptical mirror elements 62, 64.
  • the camera 20 can be in a central area of the printed circuit board can be arranged along the longitudinal axis of the printed circuit board 58.
  • FIG. 7 shows a structure with only one row of LEDs 60 on the circuit board 58.
  • the elliptical mirror 62 is connected directly to the circuit board 58, which results in a structurally simple structure.
  • the line to be illuminated is slightly tilted with respect to the vertical in which the circuit board 58 is located.
  • the line-shaped illuminated object can be scanned in the axial direction 68 with the aid of the camera 20 (not shown).
  • the lighting unit 54 described has several advantages. In this way, only a narrow strip of light is generated, so that glare to the user in the operating area is avoided.
  • the template itself is loaded with a relatively low radiation energy and thus with a low heat.
  • the use of LEDs enables quick switching on and off without changes in brightness. Permanent exposure to radiation on the original is avoided.
  • polychromatic LEDs that emit white light for example, there is no UV exposure. Furthermore, the energy consumption is comparatively low.
  • FIG. 8 an arm 70 is pivotally mounted on the lifting column 18 in a fixed axis of rotation 72 in accordance with the arrow P8.
  • the arm 70 carries the camera 20, which is mounted so as to be displaceable in the direction of the arrow P9 relative to the arm 70, for example in a rail.
  • the arm 70 is pivoted in the direction of the arrow P8.
  • the camera 20 is shifted in the direction of the arrow P9 in such a way that the optical path length w between the camera 20 and the line currently to be scanned remains essentially constant during the scanning process.
  • the axis of rotation 72 is stationary for a predetermined work surface. In order to change the scanning angle or the size of the scanning range, this axis of rotation 72 can also assume different positions in height along the lifting column 18.
  • the line 10 is scanned line by line by rotating the arm 70 about the axis of rotation 72.
  • the camera 20 is linearly displaced on the arm.
  • Motor units which are driven independently of one another and whose respective movement is coordinated by a control program can be used to pivot the arm 70 and to move the camera 20.
  • the rotary movement and linear displacement movement are preferably carried out with the aid of a single motor drive.
  • FIG. 9 shows an example for the realization of the swivel movement.
  • a motor 76 is fixedly attached to the lifting column 18.
  • a linear movement in the direction of arrow P10 can be generated with the aid of a spindle-nut combination 78.
  • the end of the spindle is rotatably connected to arm 70 at point 80.
  • FIG. 10 shows the realization of the relative movement of the camera 20 on the arm 70.
  • a cam 82 is fixed to the lifting column 18.
  • a pin 84 connected to the camera 20 slides on this cam disk 82.
  • the exemplary embodiment according to FIG. 10 has a particularly simple construction and only requires a single motor unit with which the pivoting movement of the arm 70 is generated at a largely constant angular velocity.
  • FIGS. 8 to 10 can advantageously also be combined with the lighting arrangements according to FIGS. 5 to 7.
  • a fundamental problem with image scanning using a camera is the homogeneous and efficient illumination of the original to be scanned.
  • the lighting geometry must be selected in such a way that no direct reflections of the radiation emitted by the light source reach the camera. Such reflections lead to considerable artifacts in the acquired scan images.
  • the lighting must be selected so that direct reflection is avoided.
  • the light source is positioned far outside at a flat angle so that no directly reflected light can get into the camera.
  • this procedure leads to an inefficient use of the amount of light emitted.
  • FIG. 11 shows an example of how disturbing effects due to gloss and direct reflection can be avoided with high utilization of the incident light quantity.
  • a camera scans a template 94 arranged below a glass plate 92 line by line, as has already been described above.
  • An illumination device 96 with a large-area radiation surface 98 emits radiation onto the template 94.
  • Illumination device 96 may include a plurality of light sources 100. The lighting device 96 is arranged directly above the template 94 and thus emits radiation directly onto the template 94 and the glass plate 92, so that the radiation emitted by the light sources 100 is optimally used.
  • a movable screen 102 is arranged in front of the radiation surface 98 and can be moved transversely to the line direction in the arrow directions P1, P12.
  • the line direction here is perpendicular to the paper plane. Accordingly, the diaphragm 102 has a longitudinal extent in this line direction.
  • the aperture 102 is moved in coordination with the line-by-line scanning of the camera 90 to a position in which it shields off radiation emitted by the illuminating device 96, which otherwise would be caused by direct reflection when scanning a current line would get into the camera 90.
  • the camera 90 scans a current line 104 on the template 94, a reflection beam path results with the legs 106, 108, radiation from the illumination device 96, which is incident along the leg 108, causing a gloss effect or direct reflection the glass plate 92 or the template 94 in the direction of the camera 90 would cause. Due to the position of the aperture 102 shown in FIG. 11, the radiation along the leg 108 is dimmed and this negative effect is suppressed. The aperture 102 results in only a slight reduction in the amount of radiation emitted by the lighting device 96, since the aperture 102 can be made relatively small compared to the large-area radiation surface 98.
  • the camera 90 can be movable or can be arranged at a fixed location in order to effect line-by-line scanning by rotary movement or by optical means.
  • the glass plate 92 can be non-reflective or can be omitted altogether.
  • the light sources 100 can have different embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

L'invention concerne un dispositif et un procédé pour balayer un document (10) au moyen d'une caméra (20) équipée d'un capteur de lignes. Selon l'invention, des dispositifs permettent, pendant le processus de balayage, de maintenir pratiquement constante la distante optique (w) entre la caméra (20) et la ligne à balayer, la caméra (20) effectuant alors un mouvement d'élévation et de rotation.
EP02803385A 2001-11-23 2002-11-19 Dispositif et un procede pour balayer un document en utilisant le mouvement d'elevation et de rotation d'une camera Withdrawn EP1452010A2 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE2001157574 DE10157574A1 (de) 2001-11-23 2001-11-23 Einrichtung und Verfahren zum Abtasten einer Vorlage unter Anwendung einer Hebe- und Drehbewegung einer Kamera
DE10157574 2001-11-23
DE10208384 2002-02-27
DE10208384 2002-02-27
PCT/EP2002/012961 WO2003045048A2 (fr) 2001-11-23 2002-11-19 Dispositif et un procede pour balayer un document en utilisant le mouvement d'elevation et de rotation d'une camera

Publications (1)

Publication Number Publication Date
EP1452010A2 true EP1452010A2 (fr) 2004-09-01

Family

ID=26010638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02803385A Withdrawn EP1452010A2 (fr) 2001-11-23 2002-11-19 Dispositif et un procede pour balayer un document en utilisant le mouvement d'elevation et de rotation d'une camera

Country Status (3)

Country Link
US (1) US20050002069A1 (fr)
EP (1) EP1452010A2 (fr)
WO (1) WO2003045048A2 (fr)

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