“噪声”是数字图像数据中出现了人们不希望存在的干扰或杂散信号,其形态表现和胶片拍摄时出现的光晕、幻影等杂散光不同,因画面出现较多的是点状,故也称为“噪点”。这种噪声常发生在亮度超出光电元件感度范围或在长时间曝光(图1)、选用高感光度设置及文件压缩引起数据丢失之 Noise is a disturbing or spurious signal that people do not want to exist in the digital image data. The appearance of the noise is different from that of ghosting, ghosting and other stray light when film shooting. Also known as “noise.” This noise often occurs in the brightness beyond the sensitivity of the optoelectronic components or in a long time exposure (Figure 1), the choice of high sensitivity settings and file compression caused by data loss