Image analysis – Image compression or coding – Polygonal approximation
Patent
1993-09-01
1996-11-05
Boudreau, Leo
Image analysis
Image compression or coding
Polygonal approximation
382242, 382243, 358426, G06K 936
Patent
active
055726054
ABSTRACT:
A method of compressing inputting two-dimensional object, compressing the two-dimensional data in a short time to a small amount of data and reproducing in any size at any position. This invention reads two dimensional object, e.g. characters, figures, drawings or Illustrations optically, extracts peripheral points from a binary image, approximates the peripheral lines by Fluency functions, reckons curvatures at all points, and finds joints. The peripheral points series are divided by the joints. The lines between two neighboring joints are approximated by straight lines, arcs and free curves in this order. The free curves are approximated by linear combinations of Fluency functions. Adoption of joints greatly alleviates the quantity of data. Approximation by Fluency functions heightens the quality of the reproduced objects.
REFERENCES:
patent: 4771474 (1988-09-01), Takashima et al.
patent: 5233671 (1993-08-01), Murayama
patent: 5301264 (1994-04-01), Hori et al.
patent: 5309521 (1994-05-01), Matsukawa
Patent Abstracts of Japan, vol. 009, No. 217 (P-385) 4 Sep. 1985 & JP-A-60 075 975 (Shiyaken:KK) 30 Apr. 1985 *abstract*.
Bigelow et al, "Digital Typography", Scientific American, Aug. 1993, USA, 249, 2, pp. 94-105.
Coueignoux, "Character Generation by Computer", Computer Graphics and Image Processing, vol. 16, Jul. 1981, pp. 240-269.
Hersch et al, "Model-based Matching and Hinting of Fonts", Computer Graphics, vol. 25, No. 4, Jul. 1991, pp. 71-80.
Hersch, "Descriptive Contour Fill of Partly Degenerated Shapes", IEEE Computer Graphics and Applications, vol. 6, No. 7, Jul. 1986, pp. 61-70.
Potier et al, "Geometric Modelling of Digitized Curves", First International Conference on Document Analysis and Recognition Sep. 30-Oct. 2, 1991, pp. 152-150.
Anderson David R.
Boudreau Leo
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