Patent ID: 10186073

Abstract:
Thresholds b1, b2, b3, and b4 are set in the luminance of a raw image. In an image 84a of the lowermost layer, the region in which the luminance is equal to or higher than b1 is left. In an image 84b over it, the region in which the luminance is equal to or higher than b2 is left. In an image 84c over it, the region in which the luminance is equal to or higher than b3 is left. In an image 84d of the uppermost layer, the region in which the luminance is equal to or higher than b4 is left. In each of these images, the alpha value of the other region is set to 0. The images are integrated with the color information of the raw image to generate final slice images. A display image is generated by stacking the generated slice images sequentially from the lowermost layer at predetermined intervals and performing drawing according to the point of sight.