An image processing method comprises the steps of setting a trash image candidate by defining the set of locations of the quadratic differential value of the lightness component of pixel signals, which changes from the value exceeding a positive first threshold value to the value less than a negative...http://www.google.es/patents/US6125213?utm_source=gb-gplus-sharePatente US6125213 - Image processing method, an image processing apparatus, and a storage medium readable by a computer
Image processing method, an image processing apparatus, and a storage medium ...
