Image Quality Related Processing and Applications Based on Retinex Wavelet Theory

In this paper, a new image processing model based on Retinex technique and multi-resolution wavelet analysis together to simulate the imaging course and focus mechanism of HSV is proposed. At first, the image presentation based on the Retinex model of the lightness and colour perception of human vision, which is related to the neuropsychological functions of individual neurons in the primate retina, lateral geniculation nucleus, and cerebral cortex, is designed to decompose image into constant part and variance part with ill-problem. Secondly, the multi-resolution wavelet transformation is proposed as a multiple resolution observation and analyses of image to express the image with a changeable course in wavelet domain which is sensitive to the eye's psychology character of the human vision view effect and its adjustable focus performance. The corresponding imaging dodging enhancement and restoration algorithms in the Retinex wavelet (RW) domain are designed to improve image quality with different image defects. The image processing principle based on the Retinex wavelet analysis theory is exposed together with image processing applications of image mosaic of photogrammetry workstation. The large area mosaic experiment with different luminance and uneven tone image shows it can remove mosaic scar and obtain a seamless mosaic orthodox-image with smooth tone and colour transitions after the Retinex wavelet restoration processing. * Corresponding author: Tel.:0086-27-87664633; Fax: :0086-27-87664633; Email: [email protected]