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Refine wcompress settings (lossy to near-lossless).

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harrynecek
harrynecek 2018-12-27
编辑： harrynecek 2018-12-27
Hello,
please help me. I am trying to compress a large image data set (512x512x192 px).
Firstly I have a lossless transform block (1D DWT, 2D DWT, 3D DWT, 1D KLT, 2D PCA or combination of them) than I need some quantization and source coding at the end. For the second part I am using wcompress and it works great (compressing 30:1)! But the PSNR is way too low for my application (12dB right now, I need 30 dB minimum). Can anybody help me please?
Official instructions are not very detailed.
https://www.mathworks.com/help/wavelet/ref/wcompress.html

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