Selective satellite image compression encryption method based on Chacha20 and CCSDS
An encryption method and satellite image technology, applied in the field of image processing, can solve the problems of satellite image encryption effect, small impact on compression performance, low encryption efficiency, large amount of satellite image data, etc.
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[0057] The present invention will be further described below in conjunction with the accompanying drawings and specific examples.
[0058] Based on the Microsoft VisualStudio2010 integrated development environment, programming development is carried out on a desktop computer with Intel(R) core(TM) i5-3470 3.20GHz and 4GB memory. Select the CCSDS_BPE bit plane encoder to compress and encode in units of segments, and the encoding options are set to: BitPlaneStop=0, StageStop=3, SegByteLimit=0, S=256, and the sub-band weighting coefficients are set as standard coefficients. In this example, six satellite images are selected for encryption simulation experiment, among which the size of marstest and lunar is 512×512, the size of coastal_b1, coastal_b2 and coastal_b7 is 1024×1024, and the size of coastal_b8 is 2048×2048. Use MATLAB2010b to draw graphics.
[0059] Take the marstest image with a size of 512×512 as an example to illustrate the specific encryption steps.
[0060] St...
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