Coding Efficiency Improvement By Applying Rate-Distortion Optimization To 3D-DCT Based Integral Image Compression Method

3D-DCT 기반 집적영상 압축 방법의 율-왜곡 최적화를 통한 부호화 효율 향상 방법

  • 전주일 (충북대학교 전자정보대학 정보통신공학과) ;
  • 강현수 (충북대학교 전자정보대학 정보통신공학과)
  • Received : 2012.07.27
  • Accepted : 2012.08.21
  • Published : 2012.09.28


In this paper, we propose a rate-distortion optimization method to improve the coding efficiency of the conventional 3D-DCT based compression method using adaptive block mode selection for integral images. In the conventional 3D-DCT based compression method, 3D-DCT blocks of variable block sizes are adaptively selected depending on the characteristics of integral images, and then 3D-DCT is performed. The proposed method applies a rate-distortion optimization to determine the optimal block mode. In addition, we suggest the optimal Lagrangian parameter for integral images. Experimental results show that the proposed method gives bit-rate reduction of about 5%.


Integral Images;3D-DCT;RDO


Supported by : 충북대학교


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