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Image reading apparatus, image reading program, and image reading method

一种图像读取装置、图像读取的技术，应用在图像通信、电气元件等方向，能够解决图像失真等问题

Active Publication Date: 2010-06-23
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the acceleration step and deceleration step are set, the read image will be distorted

Method used

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  • Image reading apparatus, image reading program, and image reading method
  • Image reading apparatus, image reading program, and image reading method
  • Image reading apparatus, image reading program, and image reading method

Examples

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Embodiment Construction

[0024] Next, an embodiment of the present invention will be described.

[0025] figure 1 It is a schematic configuration diagram showing an image scanner 1 that is an example of the image reading device of the present invention.

[0026] The image scanner 1 is a so-called flatbed image scanner having a document table on the upper surface of a housing. The image scanner 1 irradiates light from below to a document fixed on a document table having a transparent plate, scans it with an image sensor, and reads an image.

[0027] The image scanner 1 has: an upward-facing document table 50 for loading a document serving as a medium to be read; a document loading surface (disk surface) 51 of the document table 50; and a cover 52 covering an image reading window 53 from above. . The cover 52 is combined with the original table through a hinge mechanism, and can be opened and closed.

[0028] Further, on the left side in the figure of the tray surface 51 (upstream side along the doc...

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PUM

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Abstract

The invention provides an image reading apparatus with a sheet feeding device, which can read at high speed with simple structure. In the image reading apparatus, when the monitoring section determines that the volume of the image data is less than a predetermined first threshold value, the sheet feeding control section accelerates the transport of the original document and maintains the transport at a predetermined speed, and the reading control section starts the output of the reading signal when the transport of the original document is started. In addition, when the volume of the image data is over a predetermined second threshold value, the sheet feeding control section reduces the transport of the original document and stops, and transport of the original document stops and the output of the read signal stops. Herein, the image reading apparatus output the read signal every a certain transport distance of the original document in the period of the transport of the original document.

Description

technical field [0001] The present invention relates to an image reading technology using an ADF (Auto Document Feeder) function. Background technique [0002] There is an image scanner (image reading device) having an ADF (Auto Document Feeder) function. Such an image scanner moves a document at a predetermined speed and simultaneously reads images of all the documents with a stationary image sensor (for example, Patent Document 1). [0003] Also, the image scanner temporarily stores the read image data in a buffer, and sequentially transmits it to a host computer such as a personal computer (PC). The transmission speed depends on the processing capability of the host computer. Therefore, the reading speed of the image scanner is adjusted to be low enough to prevent the buffer from being filled. [0004] [Patent Document 1] JP-A-2006-20084 [0005] However, there is a need to increase the reading speed, but if the reading speed is high, the buffer is likely to be full. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/04H04N1/10H04N1/12
CPCH04N1/0057H04N1/00652H04N1/00588
Inventor 赤羽拓也
Owner SEIKO EPSON CORP
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