摘要
量化过程大量减少了图像中低对比度信息,也会造成超出量化量程的图像信息完全丢失。本文针对不能采用数字算法对以上图像进行有效增强的问题,提出使用模拟技术进行图像增强的方法。该方法实现了模拟信息定位、提取、放大,从而正确添加原始信息,提高图像分辨精度。其分辨能力远高于采用高分辨模数变换芯片所能达到的精度,最终实现了数字方法无法获取的图像增强效果。
During the quantifying process, the digital image may reduce a lot of low contrast information and also may lose all the information beyond the quantifying range. Using digital methods can＇t realize the satisfying enhancement for this kind of image. To resolve the problem, an analog method is proposed. Analog information is located, extracted and amplified. Through the process, the method increases the right image information and advances the image resolution which can＇t be achieved by the method of high resolution analog-digital converter. The proposed analog method realizes image enhancement that digital methods can＇t.
出处
《电子技术应用》
北大核心
2008年第5期38-40,45,共4页
Application of Electronic Technique
关键词
图像增强
相关双采样
图像采集
对比度
image enhancement
correlated double sampling
image acquisition
image contrast
