A telop character extraction apparatus generates a gray-scale image from a telop region image, and generates an edge region image where an edge is extracted from within the gray-scale image. The apparatus uses the edge region image as a mask image, and creates a luminance histogram of pixels of the gray-scale...http://www.google.de/patents/US7961948?utm_source=gb-gplus-sharePatent US7961948 - Computer-readable record medium in which a telop character extraction program is recorded, telop character extraction method and telop character extraction apparatus
