VC++编程实现对曝光不足照片的修复。 根据照相的一般原理：物体反射的光线经过透镜投影到胶片上，胶片上的感光颗粒根据光线的强弱做出不同程度的分解从而显现出不同的颜色。当没有使用闪光灯或暴光时间过短而造成照片曝光不足时，照射在胶片上的光线强度不够或照射时间过短均会使感光颗粒分解不完全，冲洗出来的照片就会发暗。

-VC++ programming to achieve the repair underexposed pictures. In accordance with the general principles of photography: light reflected from objects through the projector lens to the film, the photosensitive film on the strength of particles under the light to make varying degrees of decomposition in order to show different colors. When there is no flash or too short exposure time and exposure caused by lack of pictures, the exposure in the film or not enough of the light intensity is too short exposure time would photosensitive particles are not completely decomposed, the photo will be washed out dark.