Generation of High Contrast Image from X-ray Scene Images of Brain Blood Vessel of Rat
The X-ray scene image of a brain blood vessel of a rat can be shot by using SPring-8 that is a high-performance X-ray sensing system. However, the contrast of the scene image is not enough visually. Even if the contrast of a scene image is poor, a single image that has good contrast can be generated by accumulating all frames in the scene image. However, objects in the scene image must be fixed to use the method. This paper proposes a method to generate a single image with good contrast from X-ray scene images of brain blood vessel of a rat. The partial optimal frames that are useful for generating an output image with good contrast are selected in all frames and the selected frames are accumulated after optimal two-dimensional moving. The genetic algorithm is applied to optimize the selection and moving of frames. The experimental results show that the generated output image by the proposed method had good contrast, clearness and fewer noises in comparison with the generated image by the conventional method.