Image analysis – Histogram processing – For setting a threshold
Patent
1993-12-30
1994-10-04
Couso, Yon J.
Image analysis
Histogram processing
For setting a threshold
382 47, 358458, G06K 936
Patent
active
053533593
ABSTRACT:
A method for generating character pattern data includes steps of providing contour information of a character having m.sub.1 .times.m.sub.2 coordinate values in a coordinate space; and making and outputting gradated character pattern data of l.sub.1 .times.l.sub.2 picture elements for an output device having n gradiations per picture element (where m.sub.1, m.sub.2, l.sub.1, l.sub.2, and n are positive integers). In an image making method, picture subelements provided by dividing an original picture element are set as a scanning unit and an image is made by scanning conversion using the picture element having a gradation to perform a coloring operation with respect to the interior of a two-dimensional contour line. The image making method includes representing and processing a numeric value such as a coordinate value of a line segment constituting the contour line as a virtual real number having a decimal point in a word; providing positions for starting and completing the coloring operation easily by the representation of the virtual real number; and providing a brightness of a displayed picture element at a high speed by only adding an integer value to a region on one line in an output device.
REFERENCES:
patent: 4553173 (1985-11-01), Kawamura
patent: 4595956 (1986-06-01), Kawamura et al.
patent: 4771471 (1988-09-01), Kitamura
patent: 4797943 (1989-01-01), Murayama et al.
patent: 4912568 (1990-03-01), Shimano
Karon, Peter, "Digital Formats for Typeface", URW Verlag, 1987.
Hersch, Roger D., "Character Generation under Grid Constraints", Computer Graphics, vol. 21, No. 4, Jul. 1987.
Hersch, Roger D., "Real Scan-Conversion of Shape Contours", Computer Graphics, 1987.
Gupta, Satish, et al., "Filtering Edges for Gray-Scale Displays", Computer Graphics, vol. 15, No. 3, Aug., 1981.
Carpenter, Loren, "The A-buffer an Anitaliased Hidden Surface Method", Computer Graphics, vol. 18, No. 3, Jul. 1984.
Kajiya, J. et al., "Filtering High Quality Text for Display on Raster Scan Devices" Computer Graphics, vol. 15, No. 3, Aug. 1981.
Kaneyasu Noriyuki
Kinoshita Koji
Kitagawa Hideaki
Nihei Akira
Urabe Akio
Couso Yon J.
Ricoh & Company, Ltd.
LandOfFree
Methods for generating character pattern data and making image does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods for generating character pattern data and making image, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods for generating character pattern data and making image will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-587847