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Scanning method of image scanner

An image scanner and scanning method technology, applied in the field of image scanning, can solve the problems of reducing the scanning speed, lengthening the scanning time, increasing the exposure time of the sensor, etc.

Inactive Publication Date: 2006-07-26
PRIMAX ELECTRONICS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another solution is to increase the exposure time of the sensor, that is, to prolong the light-emitting time of the LED on each scanning line, so as to increase the brightness of the light source that the sensor can receive, but this method will make the scanning time longer and reduce the scan speed

Method used

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  • Scanning method of image scanner
  • Scanning method of image scanner
  • Scanning method of image scanner

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0042] see image 3 , which is a block diagram of an embodiment of the image scanner of the present invention. image 3 It includes an image scanner 300 with an image sensing module 301 and a control circuit 302 . The image sensing module 301 has a column of sensors 3011-301N and red LED LR, green LED LB and blue LEDLB.

[0043] The scanning method of the present invention will be described below. see image 3 and Table 1:

[0044] scan line

first output image

second output image

third output image

L1

R1+G1

G1+B1

B1+R1

L2

R2+G2

G2+B2

B2+R2

…

…

…

…

[0045] Where: R1 - red image of scan line L1

[0046] G1 - green image of scan line L1

[0047] B1 - blue image of scan line L1

[0048]In this example, red is the first color, green is the second color, and blue is the third color. When scanning the scanning line L1, the control circuit 302 makes the red LED LR and ...

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Abstract

This invention relates to image scanner and its method, which uses two colors of light diode light as source at same time and then matches simple image data computing step to get the sinned object three colors of image signal to achieve contracted exposure time to improve image signal to noise proportion effect.

Description

technical field [0001] The present invention relates to an image scanning method, and more particularly to an image scanning method for an image scanner having a contact image sensor. Background technique [0002] Image scanners are often used in offices and homes. For example, it is used to scan documents, photos or negatives, etc., so that their images are stored, for example, in a computer, or directly printed or stored with a multifunctional business machine. [0003] The image scanner mainly uses an image sensing module, such as a Charge Coupled Device (CCD) or a Contact Image Sensor (CIS), to generate electronic signals of an image. Among them, because the volume of the scanner using the contact image sensor is generally smaller than that of the scanner using the charge-coupled device, so in recent years, many manufacturers are also devoting themselves to the development of technologies related to the use of the contact image sensor on the scanner. [0004] Generally...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/04H04N1/031
Inventor 管建国
Owner PRIMAX ELECTRONICS LTD