Title:
【発明の名称】画像データ圧縮方法
Document Type and Number:
Japanese Patent JP2790815
Kind Code:
B2
Abstract:
A method of processing an image data of a two-dimensional curve comprises steps of detecting an initial point of the curve as a first vector data, detecting a terminal point of the curve as a second vector data, detecting a tangential in contact with the curve, detecting an initial point of the tangential defined as an intersection of the first mentioned tangential and another tangential of the curve passing through the initial point of the curve as a third vector data, detecting a terminal point of the first mentioned tangential and still another tangential of the curve passing through the terminal point of the curve as a fourth vector data, and reproducing the curve by a polynomial defined by M(X,Y)=A(1-t)3+(cP-(c-3)A)(1-t)2t+(dQ-(d-3)E)(1-t)t2+Et3 where A stands for the first vector data, E stands for the second vector data, P stands for the third vector data, Q stands for the fourth vector data, c and d are predetermined coefficients, and t is a parameter changing its value between zero and one.
Inventors:
MURAYAMA NOBORU
Application Number:
JP19801588A
Publication Date:
August 27, 1998
Filing Date:
August 10, 1988
Export Citation:
Assignee:
RIKOO KK
International Classes:
H04N1/41; G06F17/17; G06T3/00; G06T9/00; G06T11/20; (IPC1-7): G06T9/00; H04N1/41
Attorney, Agent or Firm:
Hideo Takino (1 outside)