The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 26, 1995
Filed:
Feb. 17, 1994
Kenji Nakamura, Kawasaki, JP;
Yutaka Ozaki, Tsuchiura, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
To rotate a multivalued source picture image consisting of picture data arranged in N rows.times.(m gradations*N) columns 90 degrees, calculating a maximum value of a transposition mode L according to an equation M=[log.sub.2 N], repeatedly selecting an A-th row by increasing a row number A in increments of 1 in the range k*2.sup.L .ltoreq.A.ltoreq.k*2.sup.L +2.sup.L-1 -1 in an inner loop and increasing a value k in increments of 1 in the range 0.ltoreq.k.ltoreq.N/2.sup.L -1 in a middle loop while increasing the transposition mode L in increments of 1 in the range of 1 to M in an outer loop, selecting a B-th row according to an equation B=A+2.sup.L-1 each time the A-th row is selected, transposing the picture data A(j) arranged at j-th columns of the A-th row to A'(j) and the picture data. A(j+m*2.sup.L-1) to B'(j) arranged at the B-th row in the range p*m*2.sup.L .ltoreq.j.ltoreq.p*m*2.sup.L +m*2.sup.L-1 -1 and 0.ltoreq.p.ltoreq.N/2.sup.L -1, transposing the picture data B(j) arranged at j-th columns of the B-th row to B'(j) and the picture data B(j-m*2.sup.L-1) to A'(j) in the range p*m*2.sup.L +m*2.sup.L-1 .ltoreq.j.ltoreq.p*m*2.sup.L +m*2.sup.L -1 to form a quasi-transposed picture image, and changing picture data E(i,m*(N-j-1)+q) of the quasi-transposed picture image to F(m*j+q) in the range 0.ltoreq.j.ltoreq.N-1 and 0.ltoreq.q.ltoreq.m-1 to form a destination picture image.