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A fast correction device and correction method for non-uniform noise of tdi CCD imaging system

A non-uniform noise and imaging system technology, applied in the field of remote sensing imaging, can solve problems such as low efficiency, high cost, and long time consumption, and achieve high efficiency, fast speed, and good uniformity

Active Publication Date: 2019-09-06
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of high cost, low efficiency, and long time consumption in the existing TDI CCD non-uniform correction system, the present invention provides a fast non-uniform noise correction device and correction method for TDI CCD imaging system

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  • A fast correction device and correction method for non-uniform noise of tdi CCD imaging system
  • A fast correction device and correction method for non-uniform noise of tdi CCD imaging system

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] Such as figure 1 As shown, a TDI CCD imaging system non-uniform noise rapid correction device of the present invention is mainly composed of FPGA logic device, TLK2711 interface, 1553B interface, RS422 interface, CAN interface, CAMERALINK interface, and display terminal. The display terminal is connected to the CAMERALINK interface, the CAMERALINK interface is connected to the FPGA logic device, the TLK2711 interface, 1553B interface, RS422 interface, and CAN interface are all connected to the FPGA logic device, and at the same time, the TLK2711 interface, 1553B interface, RS422 interface, and CAN interface are all connected to the TDI CCD imaging The system is connected.

[0025] The uniform light signal illuminates the focal plane of the TDI CCD imaging system. The TDI CCD imaging system takes pictures of the uniform light signal. The output image d...

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Abstract

A TDI CCD imaging system non-uniform noise fast correction device and correction method belong to the field of remote sensing imaging and solve the problems of high cost, low efficiency and long time consumption existing in the existing correction system. The correction device includes: TLK2711 receives the image data output by the TDI CCD imaging system; FPGA caches the image data and calculates its average gray response value, and uses real-time automatic normalization method to analyze the correction parameters; the correction parameters are sent through 1553B, RS422 or CAN For the TDI CCD imaging system, the TDI CCD imaging system takes pictures of the uniform light signal again under the current calibration parameter state and outputs the image data to be fed back to the FPGA through TLK2711 to realize the closed-loop adjustment of the calibration parameters; the display terminal receives the corrected output from CAMERALINK image data. The invention has low cost, high efficiency, and saves time and effort.

Description

technical field [0001] The invention belongs to the technical field of remote sensing imaging, and relates to a non-uniform noise fast correction device and a correction method of a TDI CCD imaging system. Background technique [0002] TDI CCD sensor is a kind of optocoupler device with time delay integration function, which has the characteristics of high sensitivity, low noise and large dynamic range, so it is widely used in remote sensing fields such as aerial reconnaissance and space detection. Due to the large number of pixels of the TDI CCD sensor, in order to make it capable of high line frequency and high efficiency output, it usually adopts the way of parallel output of multiple channels. However, due to the differences between CCD device materials, production processes and output amplifiers, the photoelectric response of each channel pixel will be inconsistent, so there is a certain degree of non-uniformity among the video signals output by each channel. This non-...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/202H04N5/217H04N5/372H04N5/765
CPCH04N5/202H04N5/765H04N23/81H04N25/71
Inventor 郑亮亮金光徐伟曲宏松张贵祥吴勇
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI