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CCD camera bias modification method and system

A processing method and processing system technology, applied in the field of CCD camera offset correction processing method and system, can solve the problem that normal exposure images and dark frame images are not acquired at the same time, real-time offset correction cannot be realized, and the effect of offset correction is deteriorated, etc. problem, to achieve the effect of flexibility, practicability, and strong versatility of the offset correction algorithm

Active Publication Date: 2011-05-25
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

Although this traditional offset correction method can play a good role in offset correction, this correction method is usually performed after the normal exposure image and the dark frame image are acquired, and the normal exposure image and the dark frame image are not acquired at the same time. Therefore, real-time offset correction cannot be realized, and such an offset correction processing method will inevitably lead to poor offset correction effect and decreased accuracy

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  • CCD camera bias modification method and system
  • CCD camera bias modification method and system
  • CCD camera bias modification method and system

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Embodiment Construction

[0029] The invention provides a CCD camera bias correction processing method, the method comprising the following steps:

[0030] 0) Generate an offset correction line by empty reading the CCD horizontal shift register, the offset correction line includes offset data, and the number of the offset data is the same as the number of pixels contained in the CCD horizontal shift register.

[0031] 1) Obtain bias data;

[0032] 2) Calculate the offset correction amount according to the offset data obtained in step 1), the specific implementation of this step is:

[0033] 2.1) Read part or all of the offset data contained in the offset correction row;

[0034] 2.2) Accumulate the bias data obtained in step 2.1) and calculate the mean value to obtain the bias correction amount.

[0035] 3) Perform real-time offset correction for each pixel data of the CCD according to the offset correction amount obtained in step 2).

[0036] 3.1) transfer the signal charge of the CCD photosensitiv...

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Abstract

The invention relates to a charge-coupled device (CCD) camera bias modification method and a CCD camera bias modification system. The method comprises the following steps of: 1) acquiring bias data; 2) calculating a bias modification amount according to the bias data acquired in the step 1); and 3) performing real-time bias modification on each image element data of the CCD according to the bias modification amount obtained in the step 2). The CCD camera bias modification method and the CCD camera bias modification system can modify image bias in real time, and effectively reduce CCD image data bias fluctuation caused by a video processing link due to factors such as working temperature, component ageing and space radiation.

Description

technical field [0001] The invention belongs to the field of optical systems, and relates to a CCD camera offset correction processing method and system. Background technique [0002] CCD (Charge Coupled Devices) is a new type of semiconductor device developed in the early 1970s. Due to its characteristics of self-scanning, high resolution, easy connection with computer, etc., as well as its outstanding advantages such as low noise, large dynamic range, high quantum efficiency, high charge transfer efficiency, wide spectral response range, and good geometric stability, it is used as A self-scanning photoelectric receiving device is widely used in industrial monitoring, non-contact measurement, PC, multimedia technology, astronomical observation, image recognition, visual communication and other fields. [0003] The traditional CCD camera video signal processing link is mainly composed of preamplifier circuit, programmable gain amplifier circuit, correlated double sampling c...

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Application Information

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IPC IPC(8): H04N5/359H04N5/341
Inventor 文延邱跃洪汶德胜陈智江宝坦姚大雷高博王宏
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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