Title:
IMAGE ROTATION METHOD
Document Type and Number:
Japanese Patent JPS60147884
Kind Code:
A
Abstract:
57 A method for rotation of a binary image by 180 degrees, includes the steps of: positioning first (Pl) and second (P2) address pointers at the center or at the beginning and end respectively of an image to be rotated; indexing the first pointer in a first direction through said image; indexing the second pointer in a second direction through said image; exchanging, for each index step, a first image word at the first pointer with a second image word, at the second pointer if the first image word and the second image word have any two bits with different values; reversing all exchanged words; storing the reversed, exchanged words at said pointer locations; repeating the above steps until the first pointer and the second pointer have been indexed through all words in the image at which point the image has been rotated by 180 degrees.
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Inventors:
JIYOON RABUAAN MITSUCHIERU
KAREN RUISU ANDAASON
FUREDERITSUKU KOORU MINTSUAA
KAREN RUISU ANDAASON
FUREDERITSUKU KOORU MINTSUAA
Application Number:
JP25211384A
Publication Date:
August 03, 1985
Filing Date:
November 30, 1984
Export Citation:
Assignee:
IBM
International Classes:
G06F12/04; G06T3/60; G06F12/02; (IPC1-7): G06F15/62
Domestic Patent References:
| JPS59165175A | 1984-09-18 |
Attorney, Agent or Firm:
Fumio Shinoda