基于光影图像获取光照信息的研究与实现

为了解决现有方法在获取光照是否为直射光且强度是否达到或超过一定值这两个光照信息时存在的问题，提出了一种基于计算机Matlab程序的图像处理，从光照形成的光影图像中自动获取上述光照信息的方法。分析了光影图像的特征与光照信息的关系，在实验室条件下拍摄了网格光影图像；用Matlab语言设计了处理程序并应用于获取该光影图像对应的光照信息。结果表明:该方法能较准确地自动获取光影图像的特征值及实际光照信息，且程序运行稳定，避免了现有方法的不足。

Research and implementation of lighting information obtaining from light-shadow images

Current methods exist some problems of obtaining the lighting information that whether the ray is direct light and whether its irradiance reaches or exceeds a certain value. In order to solve the problems, an image-processing method based on Matlab was proposed. By processing the light-shadow images, the lighting information was acquired by this method automatically. Relationships between the characteristics of light-shadow images and the lighting information were analyzed. And some grid images under laboratory lighting conditions were taken. Meanwhile, Matlab program was designed and applied to get the corresponding lighting information of the images. The results showed that this method could obtain the characteristic values of light-shadow images and actual lighting information accurately, and the program run stably.