Image analysis – Image transformation or preprocessing – Changing the image coordinates
Patent
1997-10-09
1999-09-07
Grant, II, Jerome
Image analysis
Image transformation or preprocessing
Changing the image coordinates
358488, 358471, 399372, G06K 932, H04N 104
Patent
active
059499222
ABSTRACT:
First and second patterns are located outside of an image reading area. A first pattern comprises a plurality of lines each extending at a fixed angle with respect to a sub-scan direction. A second pattern comprises a plurality of lines each extending at a fixed angle but having a reverse direction with respect to the sub-scan direction. An image reading portion reads the first and second patterns. A position error measuring portion measures first and second image reading position errors corresponding to different angle oblique lines of the first and second patterns of image data obtained as a result of reading the first and second patterns, respectively. The position error measuring portion compensates for position deviations of the first and second patterns using the first and second image reading position errors, and obtains position-deviation-compensated image reading position errors. A position error correcting portion corrects image data read by the reading means using the position-deviation-compensated image reading position errors.
REFERENCES:
patent: 5327261 (1994-07-01), Hirota
patent: 5604601 (1997-02-01), Edgar
Shunsuke Hattori, et al. "A Development of Image Scanner of High Resolution", Japan Society of Mechanical Engineers, 71.sup.st Ordinary General Meeting, Lecture Meeting, Lecture Paper Collection (IV), Mar. 29-31, 1994, Tokyo, 3 pages.
Noguchi Koichi
Wada Shinichiro
Watanuki Masayoshi
Grant II Jerome
Ricoh & Company, Ltd.
LandOfFree
Image reading apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Image reading apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image reading apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1812735