대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)
- 대한전자공학회 2003년도 하계종합학술대회 논문집 Ⅳ
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- Pages.2351-2354
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- 2003
삭제된 변환계수의 복원을 이용한 임의형태 영상영역 변환부호화
Transform Coding of Arbitrarily-Shaped Image Segments Using Recovery of Truncated Coefficients
초록
A new transform coder for arbitrarily shaped image segments is proposed. In the encoder, a block-based DCT is applied to the resulting image block after shifting pixels within the image segment to block border and padding the mean value of the pixels to empty region. For reducing the transmission bit rate, the transform coefficients located in padded region are truncated and only the remaining transform coefficients are transmitted to the decoder. In the decoder, the transform coefficients truncated in the encoder are recovered using received transform coefficients and a block-based inverse DCT is performed.
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