Image Noise Reduction with Frequency Analysis

• Main Authors: Chou-Yuh Chong, 鍾招佑
• Other Authors: 傅楸善
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/71482945603469686296

碩士 === 國立臺灣大學 === 資訊工程學研究所 === 96 === Images captured from digital still cameras are often with a certain amount of noise which is subjected to optical sources and physical limitation of instruments. To capture image with quality acceptable by customers, image signal processor in digital still camera should include noise reduction. If we use image signal processor in digital still camera, rather than post-processing software on personal computer, to reduce noise, we must consider some limitations, such as computation power, memory limit, or even some time constraint. Our method does consider these limitations, making our algorithm as simple as possible, preventing any iterative repetition, and avoiding huge memory usage. We also analyze as much information as possible locally in different frequencies to reduce noise.