Comparison of mammogram images using different quantization methods
E. T. Y. Chen, James C. Lee, Alan C. Nelson · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1993
Special devices with higher quantization resolution are needed to display or process most medical images. In this paper, we compare three different quantization approaches for mammogram images in order to process them in 8 bits/pixel resolution. Since microcalcification is one of the most important indications of risk of breast cancer, a simple shift operation (uniform quantization) cannot retain this vital information. Quantization based on the local histogram will give better results but at the price of more computation.