Image::Leptonica::Func::rotateorth
version 0.04
rotateorth.c
rotateorth.c Top-level rotation by multiples of 90 degrees PIX *pixRotateOrth() 180-degree rotation PIX *pixRotate180() 90-degree rotation (both directions) PIX *pixRotate90() Left-right flip PIX *pixFlipLR() Top-bottom flip PIX *pixFlipTB()
PIX * pixFlipLR ( PIX *pixd, PIX *pixs )
pixFlipLR() Input: pixd (<optional>; can be null, equal to pixs, or different from pixs) pixs (all depths) Return: pixd, or null on error Notes: (1) This does a left-right flip of the image, which is equivalent to a rotation out of the plane about a vertical line through the image center. (2) There are 3 cases for input: (a) pixd == null (creates a new pixd) (b) pixd == pixs (in-place operation) (c) pixd != pixs (existing pixd) (3) For clarity, use these three patterns, respectively: (a) pixd = pixFlipLR(NULL, pixs); (b) pixFlipLR(pixs, pixs); (c) pixFlipLR(pixd, pixs); (4) If an existing pixd is not the same size as pixs, the image data will be reallocated.
PIX * pixFlipTB ( PIX *pixd, PIX *pixs )
pixFlipTB() Input: pixd (<optional>; can be null, equal to pixs, or different from pixs) pixs (all depths) Return: pixd, or null on error Notes: (1) This does a top-bottom flip of the image, which is equivalent to a rotation out of the plane about a horizontal line through the image center. (2) There are 3 cases for input: (a) pixd == null (creates a new pixd) (b) pixd == pixs (in-place operation) (c) pixd != pixs (existing pixd) (3) For clarity, use these three patterns, respectively: (a) pixd = pixFlipTB(NULL, pixs); (b) pixFlipTB(pixs, pixs); (c) pixFlipTB(pixd, pixs); (4) If an existing pixd is not the same size as pixs, the image data will be reallocated.
PIX * pixRotate180 ( PIX *pixd, PIX *pixs )
pixRotate180() Input: pixd (<optional>; can be null, equal to pixs, or different from pixs) pixs (all depths) Return: pixd, or null on error Notes: (1) This does a 180 rotation of the image about the center, which is equivalent to a left-right flip about a vertical line through the image center, followed by a top-bottom flip about a horizontal line through the image center. (2) There are 3 cases for input: (a) pixd == null (creates a new pixd) (b) pixd == pixs (in-place operation) (c) pixd != pixs (existing pixd) (3) For clarity, use these three patterns, respectively: (a) pixd = pixRotate180(NULL, pixs); (b) pixRotate180(pixs, pixs); (c) pixRotate180(pixd, pixs);
PIX * pixRotate90 ( PIX *pixs, l_int32 direction )
pixRotate90() Input: pixs (all depths) direction (1 = clockwise, -1 = counter-clockwise) Return: pixd, or null on error Notes: (1) This does a 90 degree rotation of the image about the center, either cw or ccw, returning a new pix. (2) The direction must be either 1 (cw) or -1 (ccw).
PIX * pixRotateOrth ( PIX *pixs, l_int32 quads )
pixRotateOrth() Input: pixs (all depths) quads (0-3; number of 90 degree cw rotations) Return: pixd, or null on error
Zakariyya Mughal <zmughal@cpan.org>
This software is copyright (c) 2014 by Zakariyya Mughal.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
To install Image::Leptonica, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Image::Leptonica
CPAN shell
perl -MCPAN -e shell install Image::Leptonica
For more information on module installation, please visit the detailed CPAN module installation guide.