Patent ID: 7539344
Filing Date: 2009-05-26
Classification: G06K,G06T

Abstract:
1. A boundary detection method comprising: extracting feature information depending on all pixels in a unit area for each unit area of an image data; obtaining a difference in the feature information between adjacent unit areas for an arbitrary unit area; and determining as a boundary the unit area whose difference is at or higher than a predetermined level, wherein the input image data of an original whose front image is input with a background board as its background, the boundary between areas having different features among arbitrary adjacent areas in the image data is detected, a target is roughly predicted with a printing area first excluded, and a variance in feature information from the adjacent area corresponding to the printing area can be ignored, then the boundary between the background board and the original is detected, and if unit area of an image is set widely, the boundary position between the background board on the image and the original is provisionally determined based on the feature amount obtained in a two-dimensional fast-Fourier-transform, a one-dimensional fast-Fourier-transform is performed in a unit of an area smaller than the unit area of the image, and then a Wavelet transform is performed for detecting the position of the boundary.