Image analysis – Image segmentation – Distinguishing text from other regions
Patent
1995-03-16
1997-12-23
Coles, Sr., Edward L.
Image analysis
Image segmentation
Distinguishing text from other regions
382235, 3582611, 358462, G06K 934, H04N 1419
Patent
active
057013640
ABSTRACT:
A run length which is the length of a run representing continuous black pixels is calculated on the basis of binary image data, and an extending process is performed for the run using a target pixel as an object to generate an extended run. An extended run length representing the length of the extended run and a maximum run length representing the length of the longest run in the range of the extended run are calculated. If a difference between the extended run length and the maximum run length is smaller than a predetermined value, an image near the target pixel is determined as a character image. If the difference is equal to or larger than the predetermined value, the image is determined as a half-tone image. In this manner, accuracy in separation between the half-tone area and the character area in a document image can be improved.
REFERENCES:
patent: 4504972 (1985-03-01), Scherl et al.
patent: 4547811 (1985-10-01), Ochi et al.
patent: 4682215 (1987-07-01), Adachi
patent: 4879753 (1989-11-01), El-Sherbini
patent: 5016118 (1991-05-01), Nannichi
patent: 5048096 (1991-09-01), Beato
patent: 5335290 (1994-08-01), Cullen et al.
patent: 5465304 (1995-11-01), Cullen et al.
Coles Sr. Edward L.
Kabushiki Kaisha Toshiba
Nguyen Madeleine A-V
LandOfFree
Image processing 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 processing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image processing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1806674