search for: zerotree

Hello, Ok, and that's too many work to review a source code.In my codec, I have 3 compression schemes, I think 2 are not patented, but the third... I don't know.For the rest, I think my codec is patent-free (I don't use SPIHT,EZW,zerotree methods), even the wavelet transform is new and don't use the lifting scheme nor the convolution product. Else, if you found time to review the codec, do not hesitate to let me know what you think of it and if you would have remarks.Would be much appreciated. Cheers, Raphael 2015-01-17 23:01...

...(even in its current state). For example, I have made a visual comparison for mid compression (-l2 to -h2 setting) on 50 images of the NHW codec with BPG (HEVC intra), WebP, and Rududu Image Compression (Rududu is a powerful wavelet image codec, released in April 2008, that is based on SPIHT-like, zerotree coding, -it totally went under-the-radar...-). Results: The codec that has the more precision is BPG, the codec that has the more neatness is NHW.Don't know what is the best criterion between neatness and precision, but globally on 25 images out of 50 I visually prefer the results of NHW for i...

...nhwcodec at gmail.com>: > Hello, > > Ok, and that's too many work to review a source code.In my codec, I have 3 > compression schemes, I think 2 are not patented, but the third... I don't > know.For the rest, I think my codec is patent-free (I don't use > SPIHT,EZW,zerotree methods), even the wavelet transform is new and don't > use the lifting scheme nor the convolution product. > > Else, if you found time to review the codec, do not hesitate to let me > know what you think of it and if you would have remarks.Would be much > appreciated. > >...

Hello, Yes, that's right.I still think that it would have more weight if I could claim that Xiph has reviewed the source code and find that the NHW codec is royalty/patent-free (better than me alone claiming this...).Maybe it was in this sense that Ralph Giles answered me? Cheers, Raphael 2015-01-15 18:02 GMT+01:00 Jason Self <jason at bluehome.net>: > Raphael Canut asked: >