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Inhomogeneous fast noise correction apparatus and correction method of TDI CCD imaging system

A non-uniform noise and imaging system technology, applied in the field of remote sensing imaging, can solve the problems of high cost, time-consuming, low efficiency, etc., and achieve the effect of fast speed, high efficiency, and uniform response

Active Publication Date: 2017-12-01
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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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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  • Inhomogeneous fast noise correction apparatus and correction method of TDI CCD imaging system

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the 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, 1553B, RS422, and CAN interfaces are all connected to the FPGA logic device, and the TLK2711, 1553B, RS422, and CAN interfaces 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 data is received by the TLK2711 interface and input to the FPGA logic device through the TLK2711...

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Abstract

The invention provides an inhomogeneous fast noise correction apparatus and correction method of a TDI CCD imaging system, and belongs to the field of remote sensing imaging. The problems of high cost, low efficiency and long time consumption of the existing correction system are solved. The correction apparatus comprises: TLK2711 receives image data output b the TDI CCD imaging system; an FPGA caches the image data and calculates an average gray response value of the image data and analyzes a correction parameter by using a real-time automatic normalization method; the correction parameter is sent by 1553B, RS422 or CAN to the TDI CCD imaging system, the TDI CCD imaging system shoots homogeneous light signals under the current correction parameter and feeds back the output data to the FPGA through the TLK2711 so as to realize the closed loop adjustment of the correction parameter; and a display terminal receives the corrected image data output by CAMERALINK output after. The inhomogeneous fast noise correction apparatus has the advantages of low cost, high efficiency, time saving and labor saving.

Description

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

Claims

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Application Information

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Patent Type & Authority Applications(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
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