Patent ID: 6816624
Filing Date: 2004-11-09
Classification: H04N

Abstract:
An image processing apparatus comprising:an image scanning unit which scans an original document on a document table and obtains a scanned image of the original document, a height obtaining unit which utilizes data from the scanned image to obtain a plurality of heights of a plurality of points of a pair of spread pages of the original document, based on a contour of the pair of spread pages which appears in the scanned image of the pair of spread pages obtained by the image scanning unit; and an image correcting unit which corrects degradation of the image of the pair of spread pages, based on the plurality of heights obtained by the height obtaining unit, wherein said height obtaining unit comprises, a reference line extracting unit which extracts at least one reference line based on a top and bottom portions of the contour of the pair of spread pages which appears in the image, a correction area determining unit which determines as a correction area an area of the image corresponding to a portion of the pair of spread pages which is lifted from the document table, based on said at least one reference line and said contour, a distance obtaining unit which obtains a distance from each pixel of a portion of said contour in at least one edge of said correction area, to said at least one reference line, an edge height obtaining unit which obtains a height of each point of a top and bottom edges of said portion of the pair of spread pages above the document table, based on said distance obtained by the distance obtaining unit, and a height distribution obtaining unit which obtains a height of each point of said portion of the pair of spread pages above the document table, based on said height of each point of said top and bottom edges of said portion of the pair of spread pages.