[Ffmpeg-devel] Re: [Fwd: [CinCVS] New anti-patented algorithm for better Y'CbCr]

[Ramiro Ribeiro Polla]

Rich Felker wrote:
> On Sun, Mar 18, 2007 at 05:46:57PM +0100, Stefan de Konink wrote:
>   
>> -----BEGIN PGP SIGNED MESSAGE-----
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>>
>> This message was on the Cinelerra mailinglist, maybe some devs are
>> interested in the methods used.
>>
>>
>> Stefan
>>
>> - -------- Original Message --------
>>
>> I think I have already sent you an e-mail about Twibright Hyperluma. I
>> have developed two even better algorithms that reach amazing SNR
>> concerning colour detail distortion when encoding into 4:2:0 or 4:2:2
>> Y'CbCr.
>>
>> The are called Hyperluma 2 and Luminaplex. See
>> http://ronja.twibright.com/hyperluma.php
>>     
>
> Just from a casual reading of the page, it sounds stupid. The author
> somehow things a 12.96 megabyte lookup table in his implementation
> "improves performance", which signals incompetence right away.
>   

I think he never intended to achieve improved performance. In fact, he 
never mentions anything about performance. He says "fast video 
processing" comparing to calculating the lut on startup.

[...]
> All of this is based on a very casual reading; the page was long and
> ill-organized so that I couldn't quickly figure out what problem the
> author claims to be solving. If you have a better idea what it's about
> please fill me and others in on it.
>   
Well, then, maybe you should read at least most of the page before 
flaming him to death (on some mailinglist he probably doesn't read). You 
could try going to the bottom of the page and clicking on the bird that 
says "An expected information missing here?", and telling him how to 
improve his website. Like most engineers, he probably just lacks 
designing skills.

If you had read the whole first paragraph, you might have noticed he 
says "The algorithms solve the so called chroma bleed 
<http://en.wikipedia.org/wiki/Chroma_subsampling> problem".

Ramiro Polla