Illumination Equalization For Fine-Grained Change Detection Of Outdoor Scene

In the field of computer vision,it is a fundamental task to solve the problem of illumination equalization in images or video.Now many image processing applications need to get rid of the impact of lighting conditions at first,that is to say the light consistent operation,and then do some further related operations.In this paper,the problem of illumination equalization is proposed to aim at the application change detection of outdoor scene.We first propose the model of illumination constancy based co-intrinsic image.From the reflectivity of the layer image gamut sparsity,this model extract super-pixels from the images and feature extraction,and then use the zero norm sparse representation to establish relationships between multiple images.Finally,multiple images is decomposed synergistic,then the light layer and the reflectance image layers are combined to obtain the final image having uniform lighting conditions.Motivated by intrinsic image decomposition,we put forward another solution for illumination constancy which is based on hierarchical decomposition structure.Model using a probability model proposed framework for image intrinsic image decomposition,the reflectance of the image layer need add the sparse constraints,to ensure the image layer has a longer tail end of the distribution,with respect to the reflectivity of the layer images,and the layer of light need add an image smoothing constraints to ensure that the image layer has a shorter tail end of the distribution.Because the two images changes in the area is small,it is considered that the image of the two images in changing layer is very sparse,and due to the decomposition of a single image can be obtained good results,so the two images by reflectance layer image establish a relationship between the last decomposition problem will rule the two images into an optimization problem.In this paper,the former model is able to separate shading image and reflectance image and fine-grained change image,so as to solve the problem of consistent illumination for the outdoor scenes slightly changed the detection process.