A mm-ccd imaging method

Abstract

The present invention provides a kind of imaging method of MM-CCD, comprises that MM-CCD is placed obliquely, makes it and the included angle of satellite flight direction be arctan (1 / n), wherein n is a positive integer, and n is less than described MM-CCD The number of pixel rows of the CCD; when the MM-CCD is not tilted, the MM-CCD pixel length and the sampling step are d along the satellite flight direction, then when the MM-CCD is tilted according to step A After that, set its sampling step to sample 1+n 2 The second is a cycle, then the 1st+nth 2 During +1 sampling, the imaging position of the m-1 column pixel in the a+n row pixel of the MM-CCD is the same as the m-m in the a-row pixel of the MM-CCD during the first sampling Column pixel imaging positions coincide, wherein m is a positive integer and m is less than the number of MM-CCD pixel columns; the 1+n2 sequence images obtained in this cycle are pixel unmixed, and the obtained images are in The resolution of the satellite's flight direction and its vertical direction has been doubled. The invention contains more non-redundant information and can effectively improve image resolution.

Description

technical field [0001] The invention relates to the technical field of remote sensing satellite images, in particular to an MM-CCD imaging method of a satellite camera. Background technique [0002] Charge Coupled Devices CCD (Charge Coupled Devices) is a new type of semiconductor device developed in the early 1970s. In the late 1960s, BOYLE WS and SIMTH GS of Bell Laboratories in the United States discovered the phenomenon of charge transfer through semiconductor potential wells, proposed a new concept of charge coupling, and also predicted the device in signal processing and signal storage. and its application prospects in image sensing. [0003] CCD is divided into two types according to its pixel arrangement: linear array (liner) CCD and area array (Area) CCD. The area array CCD device is composed of a photosensitive unit, a transfer gate, a shift register and some auxiliary input and output circuits. When working, the light signal is sampled by the photosensitive uni...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional area array CCD has the following defects in the application of remote sensing satellite images: the signal readout and transmission bandwidth is narrow, so the transmission capability is poor

On the other hand, the resolution of the images sampled by the area array CCD is not high, which is not conducive to further analysis and utilization

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