Undefined function 'wprec2' for input arguments of type 'double'.
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I applied wpdec2 (Wavelet Packet transform) on a color image with size 512 * 512. It generates a subtree then I applied wpcoef to get it coefficients. On these coefficients I created blocks and apply DCT and inverse of DCT and blocks. Then i applied wprec2 after reverse process of block. Then i got a error as given below:
Undefined function 'wprec2' for input arguments of type 'double'.
Please help to troubleshoot this problem.
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Accepted Answer
dpb
on 22 Aug 2021
Without the actual code sequence we can't tell but the doc for wprec2 says it expects a wavelet packet tree object.
If you've munged on the output of wpdec2 to produce some output array of double, then you've broken the contract between the two of the forward/reverse transform.
All wprec2 promises is that it will reproduce X from the output of wdec2 operating on X
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