| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a line noise removal device or the like not degrading image quality of an area not having line noise, and capable of removing even line noise not having periodicity. <P>SOLUTION: This line noise removal device has: an image binarization means binarizing an input image to generate a binary image; a line noise certainty factor calculation means generating a rotation image wherein the binary image is rotated about each of a plurality of rotation angles, calculating an edge characteristic amount about each of areas wherein black pixels inside each rotation image continue, and calculating a line noise certainty factor; a line noise area determination means selecting a rotation angle candidate from rotation angles, and determining a line noise area about the rotation image corresponding to each rotation angle candidate on the basis of the line noise certainty factor; a density conversion means applying local image enhancement to an area corresponding to the line noise area of the input image to generate a density conversion image; and an image composition means composing the density conversion images when there are a plurality of rotation angle candidates to generate a composite image. <P>COPYRIGHT: (C)2008,JPO&INPIT |
