Bits needed to code image block?

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#75

From: Karl Olav Lillevold FST Student
Date: Fri, 11 Sep 1992 06:20

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I am not very experienced in validating compression algorithms, and
I now need to estimate the number of bits needed to code an image block
of an error image. The error image is the result of a motion
compensation, and I assume the coding procedure will be something
DCT-like, i.e. blockwise coding.

I have one advice: Find the squared error of each block and subtract
the gain obtainable by removing correlation. This should (somehow) 
give me an estimate of the needed number of bits.

My questions are:
1) Does anyone have a practical solution to this problem?
2) Is there a common procedure that is normally used so that
   different algorithms can be compared without needing to
   do the actual coding? (I have seen results based on
   both SNR and entropy)


Karl Olav Lillevold                email: kol@hal.nta.no
Student Norwegian Institute of Technology  (electronics)
Diploma at Norwegian Telecom Research (image processing)

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From: kol@hal.nta.no (Karl Olav Lillevold FST Student)
Subject: Bits needed to code image block?
Message-ID: <1992Sep11.062036.25959@nntp.nta.no>
Sender: news@nntp.nta.no
Nntp-Posting-Host: logos.nta.no
Organization: Norwegian Telecom Research
Date: Fri, 11 Sep 92 06:20:36 GMT
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