Variable Block-Size Transform Image Coder

Its’hak Dinstein, Kenneth Rose, Arie Heiman

Research output: Contribution to journalArticlepeer-review

24 Scopus citations


A discrete cosine transform image coding scheme based on adaptive block size is proposed and demonstrated. The scheme adaptively optimizes the block sizes according to some local activity indexes of the image scenes. The optimization is achieved by applying a technique from graph theory. Nine rectangular block sizes are used, corresponding to all combinations of 8, 16, and 32 pixels per side. This approach reduces interblock correlation between coefficients, and increases the energy compaction in the transform domain. Experimental results are presented and compared to results obtained by an identical coder using a fixed block size.

Original languageEnglish
Pages (from-to)2073-2078
Number of pages6
JournalIEEE Transactions on Communications
Issue number11
StatePublished - 1 Jan 1990

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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