(19)
(11)EP 0 493 872 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
16.03.1994 Bulletin 1994/11

(43)Date of publication A2:
08.07.1992 Bulletin 1992/28

(21)Application number: 91307262.5

(22)Date of filing:  07.08.1991
(51)International Patent Classification (IPC)5G06F 15/62
(84)Designated Contracting States:
DE FR GB IT NL

(30)Priority: 31.12.1990 KR 2275790

(71)Applicant: SAMSUNG ELECTRONICS CO. LTD.
Suwon, Kyunggi-do (KR)

(72)Inventor:
  • Park, You-koun
    Seongbuk-gu, Seoul (KR)

(74)Representative: Sturt, Clifford Mark et al
J. MILLER & CO. 34 Bedford Row, Holborn
London WC1R 4JH
London WC1R 4JH (GB)


(56)References cited: : 
  
      


    (54)Method and apparatus for image rotation


    (57) An image rotation method and an image rotation processing apparatus in an image processing apparatus are disclosed. The image rotation method obtains the coordinates (x',y') of a second memory (6) where the rotated image will be recorded, by sequentially scanning a first memory (5) where the M× N original image is recorded and adding the increments of x and y corresponding to a rotation angle ϑ repeatedly, and transmits the image element data of the coordinates (x,y) of the first memory (5) to the coordinates (x',y') of the second memory (6) with one-to-one correspondence, thereby obtaining the rotated image through the rotation angle ϑ from the original image. Thus, the present invention can obtain the rotated image using only addition operations and without any multiplication operations, so that high-speed operation is possible and an image can be rotated through a specified angle ϑ through software in common computer graphic systems having no floating point multiplier.







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