Image processing system and non-transitory computer-readable recording medium having stored thereon image processing program

A non-transitory computer-readable recording medium having stored thereon an image processing program, the image processing program causing a computer to implement:

• a convolutional neural network which determines, for each pixel of an image, a probability that the image represents handwriting;
• and
• a segmentation image generation portion which generates a segmentation image based on a result of determination by the convolutional neural network, wherein
• the convolutional neural network comprises:
• an encoder which compresses information of the tile image for each tile image obtained by dividing the image into specific size pieces;
• a decoder which restores the information of the tile image which has been compressed by the encoder;
• and
• a specific image determination portion which determines whether the tile image corresponds to a specific image, and wherein
• when the specific image determination portion determines that the tile image corresponds to the specific image, the segmentation image generation portion uses the specific image for an image of a part corresponding to the tile image in the segmentation image, and
• when the specific image determination portion determines that the tile image does not correspond to the specific image, the segmentation image generation portion uses an output image of the decoder for an image of a part corresponding to the tile image in the segmentation image.