2. The apparatus as claimed in claim 1 , wherein the text region detection unit sets a center block with a predetermined size centering on a user guide marker movable by a user in the input image, and determines that the text exists if a number of edges acquired in the set center block exceeds a threshold value.
2. The apparatus as claimed in claim 1 , wherein the text region detection unit sets a center block with a predetermined size centering on a user guide marker movable by a user in the input image, and determines that the text exists if a number of edges acquired in the set center block exceeds a threshold value. 3. The apparatus as claimed in claim 2 , wherein the text region detection unit sets a moving block with a predetermined size around the center block, seeks a histogram and edges by scanning of the moving block, and then determines the text-background color using a color value and a number of edges calculated through the analysis of the histogram.