im_affine - apply an affine transform to an image
int im_affine(in, out, a, b, c, d, dx, dy, x, y, w, h)
IMAGE *in, *out;
double a, b, c, d, dx, dy;
int x, y;
int w, h;
This function is deprecated. See im_affine(3) for the replacement.
im_affine(3) applies an affine transformation on the image held by the
IMAGE descriptor in and puts the result at the location pointed by the
IMAGE descriptor out. in many have any number of bands, be any size,
and have any non-complex type.
The transformation is described by a, b, c, d, dx, dy. The point (x,y)
in the input is mapped onto point (X,Y) in the output by
X = a * x + b * y + dx
Y = c * x + d * y + dy
The area of the output image given by w, h, x, y is generated. (0,0) is
the position of the transformed top-left-hand corner of the input
image. Function im_affine resamples the transformed image using
The functions return 0 on success and -1 on error.
21 December 1999