胸部X线影像增强研究多尺度Retinex技术.pdfVIP

Chest Radiographic image Enhancement based on Multi-scale Retinex Technique Chen Shuyue, Zou Ling School of Information Science and Engineering, Jiangsu Polytechnic University Changzhou, China csyue2000@yahoo.cn Abstract-Retinex technique has been widely employed in medical convex set[12]. Jyh-Shyan et al. used wavelet processing and other fields. Chest radiographic image is often suffered from technique to segment a chest radiograph into different gray its poor dynamic rang due to x-ray radiography of different chest level regions, then applied different degrees of contrast tissues densities. To compress the dynamic range and enhance enhancement to process them[13]. We normalized the chest contrast for improving the visibility of the dark regions on chest radiograph, an enhancement method based on multi-scale Retinex radiographic image with histogram equalization then applied was presented. Two-scale Retinex with different weighted factors an established piecewise linear transformation model to obtain was utilized and compared its result with several methodologies an automatic procedure in our previous work[14]. including three-scale Retinex, contrast-limited adaptive histogram In the paper, we employed two-scale Retinex method equalization, Frankle-McCann and McCann Retinex. It is shown associated with Gaussian sur