How to use wcompress
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Sivert Bakken
on 28 Feb 2018
Edited: Walter Roberson
on 23 Sep 2022
The following is stated in the documentation for wcompress: "X can be either a 2-D array containing an indexed image or a 3-D array of uint8 containing a truecolor image. Both the row and column size of the image must be powers of two."
Is there any way the 3-d image or datacube can be of a different type than uint8 and the rows and columns of something different than a number that is a power of two?
Is this possible or do I have to implement something myself?
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Walter Roberson
on 1 Mar 2018
The code tests for power of 2, so that cannot be changed.
The code does not test for uint8. In my test with 'wdr' compression, if I did not specify 'bpp', 16 then the compression ran through but the uncompression had values that were maximum 255. In my test with 'wdr' compression when I specified 'bpp' 16, then the compression ran through and I did enough tracing that it looks like it should have worked, but the data structures produced created errors in decompression.
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More Answers (1)
Abhishek Ballaney
on 1 Mar 2018
https://in.mathworks.com/help/wavelet/ref/wcompress.html
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faten Abushmmala
on 23 Sep 2022
is there another function in matlab for compressing 1D data (speech or any signal) that is equivlant for wcompress ?
Walter Roberson
on 23 Sep 2022
Edited: Walter Roberson
on 23 Sep 2022
Equivalent in what sense? What would it have to do differently than wcompress? There is a complete wavelet toolbox https://www.mathworks.com/help/wavelet/index.html
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