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Image-reading apparatus and image-reading method

An image reading device and image data technology, which are applied in image communication, image data processing, image data processing and other directions, can solve the problem of unable to reproduce the accurate image of the lost data position, etc., and achieve the effect of eliminating deformation

Inactive Publication Date: 2017-11-28
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the device described in Patent Document 1, if there is high-frequency image information at a position on the document corresponding to a data loss position between adjacent sensor chips, there is a possibility that an accurate image of the data loss position cannot be reproduced. The problem

Method used

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  • Image-reading apparatus and image-reading method
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  • Image-reading apparatus and image-reading method

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Experimental program
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Embodiment approach 1

[0035] "1-1" Structure of Embodiment 1

[0036] figure 1 It is a functional block diagram showing a schematic configuration of the image reading device 1 according to Embodiment 1 of the present invention. like figure 1 As shown, the image reading device 1 has an imaging unit 2 , an A / D (analog / digital) conversion unit 3 , and an image processing unit 4 . Furthermore, the image processing unit 4 has an image memory 41 , a similarity calculation unit 42 , a combined position estimation unit 43 , and a combined unit 44 . In addition, the image reading device 1 may include a transport unit for transporting a document and a control unit for controlling the entire device. The conveyance unit and the processor as the control unit will be described in Embodiment 2 described later.

[0037]The imaging unit 2 has N (N is an integer greater than or equal to 2) sensor chips arranged linearly on the substrate. Each of the N sensor chips has a plurality of imaging elements arranged ...

Embodiment approach 2

[0105] Part of the functions of the image reading device 1 in Embodiment 1 described above and Embodiment 3 described later may also be implemented by a hardware configuration, or may be implemented by a microprocessor including a CPU (Central Processing Unit: Central Processing Unit). executed by a computer program. When a part of the functions of the image reading device 1 is realized by a computer program, the microprocessor downloads and executes the computer program from a computer-readable storage medium, whereby part of the functions of the image reading device 1 can be realized.

[0106] Figure 14 It is a block diagram showing a hardware configuration capable of realizing part of the functions of the image reading device by a computer program. like Figure 14 As shown, the image reading device 1a has an imaging unit 2, an A / D conversion unit 3, and an arithmetic unit 5. In the y-axis direction ( figure 2 (a) and (b) show) conveying section 6 that conveys the docum...

Embodiment approach 3

[0112] The image reading device 1 described in Embodiment 1 is configured as follows: Figure 17The combination magnification setting unit 45 in the combination unit 44 of the image processing unit 4 configured as shown calculates the reading width Wc in the main scanning direction of the reading area (the main scanning width Wc between the positions at both ends) based on the position data D43 at both ends of each unit. The width in the scanning direction) is used to set the combination magnification and combination position based on the width Wr between the reading width Wc and the combination reference position Pr. However, it can also be configured to use Figure 18 The composite magnification setting unit 45b shown calculates the overlap amount at the time of reading based on the position data D43, and sets the composite magnification and the composite Location.

[0113] "3-1" Structure of Embodiment 3

[0114] Figure 18 It is shown that in the image processing unit ...

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Abstract

An image-reading apparatus (1) is provided with: N sensor chips arranged in a first direction, each of the sensor chips having a plurality of imaging elements arranged in the first direction; N optical systems in which reduced images of N read ranges aligned in the first direction on a document are individually formed in the N sensor chips; and an image-processing unit (4) in which the position, in the first direction, of the overlapping areas of adjacent read ranges is determined using image data generated by the N sensor chips, the magnification of the read image and a compositing position are obtained from the position in the first direction thus determined, an image process is performed to correct the magnification in the first direction of the image data of the N read ranges, and the image data of the N read ranges subjected to the image process is combined to generate composite image data (D44), the image data being image data of the overlapping areas, the overlapping areas being areas in which there is an overlap between the adjacent read ranges in the image data of the N read ranges, and the compositing position being a position in which two items of image data are combined.

Description

technical field [0001] The present invention relates to an image reading device and an image reading method for optically scanning a document to generate image data. Background technique [0002] As an image reading device applied to copiers, scanners, facsimiles, etc., a contact image sensor that scans a document to be read with a one-dimensional imaging element (line sensor) to generate image data corresponding to the document is used. The close-contact image sensor has a plurality of sensor chips arranged linearly in the main scanning direction, and each of these sensor chips has a plurality of imaging elements arranged linearly in the main scanning direction at a predetermined arrangement pitch. However, no imaging element is arranged between adjacent sensor chips among the plurality of sensor chips. Therefore, when the arrangement pitch of the imaging elements is small, the loss of data corresponding to the positions between adjacent sensor chips is significant, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/19G06T1/00H04N1/387
CPCH04N1/387H04N1/3876H04N1/401H04N1/00034H04N1/192H04N1/393H04N2201/0081
Inventor 浅村麻纱子山中聪河野裕之
Owner MITSUBISHI ELECTRIC CORP
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