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 scanning speed and reducing exposure time.

Inactive Publication Date: 2007-12-05
QISDA SUZHOU
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  • Abstract
  • Description
  • Claims
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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 CC

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  • Fast scanning method for scanner
  • Fast scanning method for scanner
  • Fast scanning method for scanner

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[0017] The detailed description and technical content of the present invention are described as follows in conjunction with the drawings:

[0018] FIG. 1 is a schematic diagram of the pixel relationship between the CCD and the scanned document in the stagger CCD scanner 10. The odd CCD 111 and the even CCD 112 are arranged in a staggered arrangement to scan the document 12. Among them, the highest resolution of odd CCD111 and even CCD112 is Adpi. The minimum pixel width that can be resolved by each CCD unit of the odd CCD111 and the even CCD112 is 2L=1 / A(inch). Because the odd CCD111 and even CCD112 are arranged in a staggered arrangement, two CCD111 and 112 are used for scanning at the same time, and the data sent by the odd CCD111 and CCD112 can be combined to achieve the purpose of scanning the document 12 with a resolution of 2Adpi The minimum pixel width that can be resolved is L=1 / 2A (inch). FIG. 2A is a schematic diagram of the scanning operation of the document 12 with the...

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Abstract

The scanner possesses two pieces of charge-coupled device (CCD): first CCD and second CCD. Fast scanning method includes steps: setting up the scanner working at first resolution; using first CCD to obtain first pixel data array at first resolution; using second CCD to obtain second pixel data array at second resolution; adding corresponding pixel data between first pixel data array and second pixel data array to calculate out the output pixel data array at 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...

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Application Information

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IPC IPC(8): H04N1/04H04N1/03H04N1/17
Inventor 刘欢
Owner QISDA SUZHOU
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