Arbitrary-Shape ROI Coding Based on Wavelet Zeroblock for 3D Volumetric Images
Jiaji Wu · Dianzi xuebao · 2006
Region Of Interest(ROI) coding is an important technology presented by JPEG2000.However,JPEG2000 can not support arbitrary-shape ROI and any scaling value at the same time.A 3D volumetric image compression algorithm based on the arbitrary-shape ROI and 3D lifting wavelet zeroblock coding is proposed.New scheme supports lossy to lossless compression between inside and outside ROI.A simplebit liftingmethod for the generation of the lossless ROI mask for arbitrary-shape ROI is proposed.Considering the feature of 3D subband,we employ 3D zeroblock algorithm which is a modified 3DSPECK algorithm to encode transformed coefficients.Some coding techniques that can realize arbitrary-shape ROI coding are evaluated.Experimental results show the proposed algorithm exhibits much better performance.