Real Time Contrast Enhancement Method for Change Detection System

• Main Authors: Fang-Sheng Lee, 李昉昇
• Other Authors: Chi-Fang Lin
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/22051079231773130317

碩士 === 元智大學 === 資訊工程學系 === 95 === As the technology moving forward, information device has made huge progress. Surveillance System takes advantage of the computational ability to solve more complex problems. For example, change detection and contrast enhancement. The purpose of this paper is to improve the contrast of the image and clear the whole image when detecting moving objects under insufficient light environment. Change detection system uses the characteristic of image moment to overcome the variation of light. Thus the system is immune to the light variation. Contrast enhancement employs the concept of gray-level grouping to redistribute the histogram components uniformly over the grayscale. Consequently, low-contrast images are transformed to normal images with no over-enhancement.