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Image pickup system and image processing method

An image pickup and image technology, applied in image communication, components of TV systems, TV, etc., can solve problems such as high cost and complex image pickup system, and achieve the effect of improving more complex

Inactive Publication Date: 2010-06-30
BRIGATES MICROELECTRONICS KUNSHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The present invention provides an image pickup system and an image processing method to improve the phenomenon that the existing image pickup system with a wider dynamic range is more complicated and has a higher cost

Method used

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  • Image pickup system and image processing method
  • Image pickup system and image processing method

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no. 1 example

[0044] The first embodiment of the present invention introduces an image pickup system, figure 2 It is a schematic structural diagram of the image pickup system in the first embodiment of the present invention, combined below figure 2 The first embodiment of the present invention will be described in detail.

[0045] Such as figure 2As shown, the image pickup system includes an image sensor 201 that can perform alternate exposure according to different exposure times, and converts the image into image raw data under the alternate exposure conditions, and performs image recovery processing on the image data, and outputs an image signal of an image signal Processor 203.

[0046] The image sensor 201 in this embodiment adopts a CMOS image sensor. Specifically, the CMOS image sensor may adopt a commonly used four-transistor (4T) structure, or may adopt a three-transistor (3T) structure or a five-transistor (5T) structure. . Limited by the capability of the photosensitive el...

no. 2 example

[0079] The second embodiment of the present invention describes the image processing method implemented by the above-mentioned image pickup system of the present invention, Figure 4 It is the flow chart of the image processing method in the second embodiment of the present invention, combined below Figure 2-Figure 4 The second embodiment of the present invention will be described in detail.

[0080] Step 401: Use the image sensor to alternately expose the image at different exposure times, and convert the image into original image data.

[0081] In order to expand the dynamic range of the image pickup system, in this embodiment, the exposure control unit 204 is used to control the image sensor 201 to perform alternate exposure according to different exposure times. Among them, the shorter exposure time can distinguish the details of the brighter areas in the image, and the longer exposure time can distinguish the details of the darker areas of the image, and the original da...

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Abstract

The invention discloses an image pickup system, which includes an image sensor, a preprocessor, and an image signal processor, wherein the image sensor implements alternative exposure according to different exposure time and converts the images into the original image data; the preprocessor implements synthesizing treatment on the original image data according to the length of the exposure time and outputs synthesized image data; the image signal processor implements image recovering treatment on the synthesized image data and outputs an image signal. The invention also discloses a corresponding image processing method. The image pickup system and image processing method realize expansion of dynamic scope under the condition of lower cost.

Description

technical field [0001] The invention relates to the field of digital image processing, in particular to an image pickup system and image processing method with a wide dynamic range. Background technique [0002] The image pickup system mainly includes an image sensor and an image processing unit. Among them, an image sensor refers to a semiconductor device that converts an optical image into an electrical signal. Existing image sensors are mainly divided into two types, one is a Charge Coupled Device (CCD, Charge Couple Device) image sensor, and the other is a Complementary Metal-Oxide Semiconductor (CMOS, Complementary Metal-Oxide Semiconductor) image sensor. Among them, due to the advantages of low price, simple manufacturing process, and low power consumption, CMOS image sensors have received more and more attention, especially in portable devices. [0003] An important index to evaluate the quality of an image sensor (or image pickup system) is the dynamic range. Dyna...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/335H04N25/00
Inventor 罗文哲
Owner BRIGATES MICROELECTRONICS KUNSHAN
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