26 June 1998 Block-based wavelet transform coding of mammograms with region-adaptive quantization
Author Affiliations +
To achieve both high compression ratio and information preserving, it is an efficient way to combine segmentation and lossy compression scheme. Microcalcification in mammogram is one of the most significant sign of early stage of breast cancer. Therefore in coding, detection and segmentation of microcalcification enable us to preserve it well by allocating more bits to it than to other regions. Segmentation of microcalcification is performed both in spatial domain and in wavelet transform domain. Peak error controllable quantization step, which is off-line designed, is suitable for medical image compression. For region-adaptive quantization, block- based wavelet transform coding is adopted and different peak- error-constrained quantizers are applied to blocks according to the segmentation result. In view of preservation of microcalcification, the proposed coding scheme shows better performance than JPEG.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Nam Su Moon, Nam Su Moon, Jun Seok Song, Jun Seok Song, Musik Kwon, Musik Kwon, JongHyo Kim, JongHyo Kim, ChoongWoong Lee, ChoongWoong Lee, } "Block-based wavelet transform coding of mammograms with region-adaptive quantization", Proc. SPIE 3335, Medical Imaging 1998: Image Display, (26 June 1998); doi: 10.1117/12.312533; https://doi.org/10.1117/12.312533

Back to Top