Correction of non-uniformity response for multiple output TDI CCD imaging system

Zheng Liangliang

To solve the non-uniformity response of multiple outputs in TDI CCD imaging systems, every factors that may influence the non-uniformity response were analyzed in detail according to the flow of video signal process. Compared with popular correction methods of non-uniformity response, an improved method based on single point calibration was proposed, which integrated the advance of single-point correction and two-point correction methods. The improved single-point method has the features of simple algorithm, high efficiency, good practical application, low work of measurement, and so on. The results of experiments show that the non-uniformity response of TDI CCD imaging system declines from 3.5% to 1.5% according to the images using the improved method of single point calibration. The maximum of non-uniformity responses among multiple outputs is less than 2.5% during the full response range. The improved method of single-point calibration can satisfy the requirements of TDI CCD image systems and be practical in engineering.

1. National & Local United Engineering Research Center of Small Satellite Technology,Changchun Institute of Optics fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China

Received Date: 2014-10-13

Rev Recd Date: 2014-11-16

Publish Date: 2015-01-25

Key words:

Abstract: To solve the non-uniformity response of multiple outputs in TDI CCD imaging systems, every factors that may influence the non-uniformity response were analyzed in detail according to the flow of video signal process. Compared with popular correction methods of non-uniformity response, an improved method based on single point calibration was proposed, which integrated the advance of single-point correction and two-point correction methods. The improved single-point method has the features of simple algorithm, high efficiency, good practical application, low work of measurement, and so on. The results of experiments show that the non-uniformity response of TDI CCD imaging system declines from 3.5% to 1.5% according to the images using the improved method of single point calibration. The maximum of non-uniformity responses among multiple outputs is less than 2.5% during the full response range. The improved method of single-point calibration can satisfy the requirements of TDI CCD image systems and be practical in engineering.

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Reference (15)

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Correction of non-uniformity response for multiple output TDI CCD imaging system

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