<div>Hello,</div><div> </div><div>Just contact you quickly again as my last post and questions were not maybe very precise, and maybe rather vague...</div><div> </div><div>To precise, really hope that my question is relevant on this channel (and that I am not disturbing you), my approach would be to have a little more neatness (or sharpness) to the detriment, of course, of precision (at the same compression ratio).</div>
<div> </div><div>For example (very quickly), for me Google WebP is a codec that has a very (very) impressive precision, but on the other hand it maybe tends to decrease a little neatness (always for me at my very humble level, I am not an expert).My codec doesn't have this same (impressive) level of precision, but would have maybe a little more neatness... Would you think this could be also an "acceptable" approach? Or do you think that precision is the definitely first "criteria of selection" for an image codec, far above neatness for example? And that I have to add more precision to my codec, even if it is to decrease neatness...(My algorithm which is not the same, would be however coded this way)...</div>
<div> </div><div>I thank you very much for any advice and comment.Also maybe this thread is meaningless without source code.I am ok to give the current source code quickly if it would add interest to my work, but it would be maybe better to finalize the codec first (and adapt it to any size, clean up the code and add quality settings,...)? I will also ask for it to Monty Montgomery as he also helped me to improve my codec these last 3 months (thank you very much again).If the source code would be required, also do not hesitate to let me know, but maybe first would you think this work and its approach could be of interest?</div>
<div> </div><div>If you would have time, any comment and advice on the codec and demo page in general, would be really very welcome and helpful.</div><div> </div><div>Many thanks,</div><div>Raphael<br><br></div><div class="gmail_quote">
Le 14 mars 2012 14:11, Raphael Canut <span dir="ltr"><<a href="mailto:nhwcodec@gmail.com">nhwcodec@gmail.com</a>></span> a écrit :<br><blockquote style="margin:0px 0px 0px 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid" class="gmail_quote">
<div>Hello,</div><div> </div><div>Is is a great pleasure to post on a Xiph IRC Channel.I contacted you to have your advice and comment about wavelets for image/video compression, as I have made a wavelet-based image compression codec.</div>
<div> </div><div>I know that currently the best image/video compression codecs use the DCT block-based transform, like JPEG, Ogg Theora and the recent Google WebP, for example, but what would you think of wavelet transform?</div>
<div> </div><div>Here is the link for my wavelet-based image compression codec: <font><a href="http://nhwcodec.blogspot.com/" target="_blank">http://nhwcodec.blogspot.com/</a></font></div><div> </div><div>I am still trying to improve my codec, and so any comments and advice are very welcome.I had few, but great discussions with Monty Montgomery and he also encouraged me to post and present my work on the channel.</div>
<div> </div><div>Very quickly, the main features would be a fast decoder and maybe a good neatness.You can find few results on the demo page.You can also download the win32 binaries to test it. -I am planning to give the source code and algorithm detail rather quickly, but currently the codec is absolutely not finalized, I am changing algorithm every month currently(...), would also have to adapt the codec to any size of image, code 30-40 quality settings,... the current version is just a very first (but functional) one.-</div>
<div> </div><div>Do not hesitate to leave any comment and advice on this work, if you would have time, would be really so much appreciated, and/or in general what do you think of wavelets for image compression?</div><div>
</div><div>Many thanks!</div><div>Best regards,</div><div>Raphael</div><div> </div><div> </div><div> </div><div> </div>
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