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Fast scanning method for scanner

A fast scanning and scanner technology, applied in the field of fast scanning, can solve the problems of low CCD usage rate and long exposure time, and achieve the effect of increasing the scanning speed and reducing the exposure time.

Inactive Publication Date: 2009-12-02
QISDA SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current problem is that when the scanning resolution is 600dpi or below, only one CCD is used and the other CCD is idle, which causes the problem of low CCD usage
And because only a single CCD is used, the exposure takes a long time

Method used

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Experimental program
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Embodiment Construction

[0017] Relevant detailed description and technical content of the present invention, now just explain as follows with respect to matching drawing:

[0018] figure 1 In the stagger CCD scanner 10, it is a schematic diagram of the relationship between the CCD and the pixel of the scanned document. The first CCD 111 and the second CCD 112 are staggered to scan the document 12 . The highest resolutions of the first CCD 111 and the second CCD 112 are A dpi. The minimum resolution pixel width of each CCD unit of the first CCD 111 and the second CCD 112 is 2L=1 / A(inch). Since the first CCD 111 and the second CCD 112 are arranged in a misplaced position, two CCDs 111 and 112 are used to scan at the same time, and the data sent by the first CCD 111 and CCD 112 can be combined to achieve the resolution of the document 12. The purpose of scanning at 2A dpi, and the minimum pixel width that can be resolved is L=1 / 2A(inch). Figure 2A Is the traditional use figure 1 A schematic diagra...

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PUM

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Abstract

The present invention provides a fast scanning method of a scanner, wherein the scanner has two charge coupled devices (charge coupled devices, CCD), which are respectively a first CCD and a second CCD, and the fast scanning method of the scanner comprises: setting The scanner works at the first resolution; utilize the first CCD to obtain the first pixel data array of the first resolution; utilize the second CCD to obtain the second pixel data array of the first resolution; and the first pixel data The corresponding pixel data in the array and the second pixel data array are respectively added to calculate the output pixel data array of the first resolution.

Description

technical field [0001] The invention relates to a fast scanning method of a scanner, in particular to a scanning method which has two CCDs and can scan fast at low resolution scanning. Background technique [0002] Currently, most scanners on the market use a staggered charge coupled device (stagger CCD) as a photosensitive component. It utilizes the pixel merge of two CCDs to achieve twice the maximum scanning resolution of individual CCDs. For example, two CCDs with a scanning resolution of 600dpi are fitted together to achieve a scanning resolution of 1200dpi. [0003] When the scanning resolution is adjusted to 600dpi or below, the scanner only uses one CCD for scanning. When the scanning resolution is adjusted to 300dpi, a CCD is used to notify the CCD used to only send out data with a resolution of 300dpi by adjusting the timing. According to the imaging principle of the charge-coupled device (CCD) of the photosensitive component, it can be seen that the exposure ti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N1/04H04N1/03H04N1/17
Inventor 刘欢
Owner QISDA SUZHOU