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Digital image processing method and apparatus for CMOS imaging sensor

An oxide semiconductor and image sensor technology, which is applied in image communication, color TV parts, TV system parts, etc., can solve the problem of low image contrast, improve contrast, improve dynamic response range, and ensure quality Effect

Inactive Publication Date: 2008-05-21
VIMICRO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, an embodiment of the present invention provides a digital image processing method of a CMOS image sensor to solve the problem of low image contrast caused by the existing digital image processing method of a CMOS image sensor

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  • Digital image processing method and apparatus for CMOS imaging sensor
  • Digital image processing method and apparatus for CMOS imaging sensor

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Embodiment Construction

[0018] In the embodiment of the present invention, the brightness value when the pixel reaches saturation is set as the brightness threshold, and the preset exposure time is extended during exposure, and multiple exposure time slots are set for some pixels in the preset pixel list Click to expose. When the first exposure time slot is reached, the current luminance value of each pixel in the preset part is compared with the luminance threshold, and the current luminance value of the pixel whose current luminance value is greater than the luminance threshold is compared with the current luminance value. exposure time, and continue to expose the pixels of the preset part; before the arrival of the last exposure time slot, each time an exposure time slot is reached, compare the current Whether the luminance value is greater than the luminance threshold, if yes, record the current luminance value and current exposure time of the pixel; when the last exposure time slot is reached, r...

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Abstract

The invention discloses a digital image processing method and device of a complementary metal oxide semiconductor image sensor to solve the problem of low image contrast caused by the digital image processing method in the existing CMOS image sensor. In this method, the exposure time is set to a plurality of exposure time slots according to the preset exposure time. When exposing some pixels preset in the pixel array according to the set exposure time, each time an exposure time slot is reached, record The exposure information of the pixel points of the preset part; and then perform digital information processing DSP on the exposure information of the pixel points of the preset part. According to the solution proposed by the present invention, the dynamic response range of the CMOS image sensor can be improved, thereby improving the contrast and quality of the obtained image.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to a digital image processing method and device of a complementary metal oxide semiconductor image sensor. Background technique [0002] CMOS (Complementary Metal-Oxide-Semiconductor, Complementary Metal-Oxide Semiconductor) image sensor has the characteristics of high integration, common manufacturing process, small size, low power consumption, and no halo. In terms of non-contact non-destructive measurement and target monitoring, etc., Like the relatively mature CCD (Charge Coupled Device, Charge Coupled Device) system, it is playing an increasingly important role. [0003] The human eye is very sensitive to changes in light and shade in the external environment. In a strong light environment, the pupil narrows to make the scene less dazzling; while in weak light, the pupil dilates to make the scene as clear as possible. In imaging, this is called exposure. When...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/335H04N25/00
Inventor 谢律
Owner VIMICRO CORP