Contrast enhancement based on a novel homogeneity measurement

✍ Scribed by H.D. Cheng; Mei Xue; X.J. Shi

• Book ID: 104161689
• Publisher: Elsevier Science
• Year: 2003
• Tongue: English
• Weight: 867 KB
• Volume: 36
• Category: Article
• ISSN: 0031-3203
• DOI: 10.1016/s0031-3203(03)00054-2

✦ Synopsis

Contrast enhancement is a very important issue in image processing, pattern recognition and computer vision. These are mainly: (1) indirect method of contrast enhancement and (2) direct method of contrast enhancement. The indirect method is to modify the histogram, which is not e cient and e ective, since it only stretches the global distribution of the intensity. The direct method is to deÿne a measurement of the contrast and use it to enhance the contrast. In this paper, we propose a novel homogeneity measurement and utilize it to deÿne and enhance the contrast. The proposed approach uses both the local and global information. We have experimented the proposed algorithm on a variety of images, and the results prove that the proposed method has better performance than the existing methods, no over-enhancement/under-enhancement and more robust.