eventually you can compare de gradient of the images. bye, rafael diniz
Em Ter 11 Set 2007, David McNab escreveu: > Hi, > > Does anyone know of any nix-compatible tools which can objectively > measure the quality loss of video caused by various types of > compression/manipulation? > > One way I can think of is sum of squares of pixel YUV or RGB > differences. How effective would this really be? Are there better ways? > For example, to limit the sum of squares calculation to i*j-sized pixel > groups? > > Is there any free/opensource software available for *nix systems, to > measure quality degradations? > > Cheers > David -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Ciência da Computação @ Unicamp Rádio Muda, radiolivre.org, TV Piolho, tvlivre.org, www.midiaindependente.org Chave PGP: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x2FF86098 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-
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