A method for improving the signal-to-noise ratio of the output image of an electron multiplication ccd camera

Abstract

The invention provides a method for improving the signal-to-noise ratio of the output image of an electron multiplication CCD camera. According to the characteristics of the micro-photoelectron multiplication CCD device, the method adopts the working mode of continuous vertical transfer and intermittent horizontal transfer, and uses the output multi-line CCD analog signal to perform analog The time-delayed addition of digital image data after digital conversion solves the problems of low signal-to-noise ratio and insufficient dynamic range when single-line analog signal output in the application of electronic multiplier CCD devices, and realizes the improvement of signal-to-noise ratio and dynamic range. The method of the present invention can be applied to imaging systems of electron multiplier CCDs and other area array CCDs, has the advantages of easy implementation and high precision, can effectively improve the signal-to-noise ratio and increase the dynamic range, thereby improving image quality and enhancing the imaging system. performance.

Description

technical field [0001] The invention belongs to the technical field of aerospace remote sensors, and relates to a method for improving the signal-to-noise ratio of an output image of an electron multiplication CCD camera, which can be applied to an electron multiplication CCD and other area array CCD imaging systems, and has the advantages of easy implementation and high precision. It can effectively improve the signal-to-noise ratio and increase the dynamic range, thereby improving the image quality and improving the performance of the imaging system. Background technique [0002] The structure of the electron multiplying CCD (EMCCD for short) is similar to that of a common CCD, except that a special multiplying register is added between the readout register and the output amplifier. The structure of the multiplication register is similar to that of the readout register, except that one phase electrode is replaced by a pair of electrodes, one is applied with a DC voltage, a...

AI Technical Summary

Problems solved by technology

[0004] The technical solution problem of the present invention is: aiming at the problem of insufficient signal-to-noise ratio and insufficient dynamic range in the application of an EMCCD device in outputting a row of image data, a method for realizing improving the signal-to-noise ratio of an electronic multiplication CCD camera output image is provided, which improves SNR

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