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rotation

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This commit is contained in:
Joseph Redmon
2015-04-09 23:00:33 -07:00
parent 4f50e29365
commit 5a49c1d962
4 changed files with 37 additions and 10 deletions
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29
src/image.c
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@ -1,6 +1,7 @@
#include "image.h"
#include "utils.h"
#include <stdio.h>
#include <math.h>
int windows = 0;
@ -256,16 +257,23 @@ image float_to_image(int w, int h, int c, float *data)
return out;
}
void rotate_image(image m)
image rotate_image(image im, float rad)
{
int i,j;
for(j = 0; j < m.c; ++j){
for(i = 0; i < m.h*m.w/2; ++i){
float swap = m.data[j*m.h*m.w + i];
m.data[j*m.h*m.w + i] = m.data[j*m.h*m.w + (m.h*m.w-1 - i)];
m.data[j*m.h*m.w + (m.h*m.w-1 - i)] = swap;
int x, y, c;
float cx = im.w/2.;
float cy = im.h/2.;
image rot = make_image(im.w, im.h, im.c);
for(c = 0; c < im.c; ++c){
for(y = 0; y < im.h; ++y){
for(x = 0; x < im.w; ++x){
float rx = cos(rad)*(x-cx) - sin(rad)*(y-cy) + cx;
float ry = sin(rad)*(x-cx) + cos(rad)*(y-cy) + cy;
float val = billinear_interpolate(im, rx, ry, c);
set_pixel(rot, x, y, c, val);
}
}
}
return rot;
}
void translate_image(image m, float s)
@ -358,15 +366,22 @@ image resize_image(image im, int w, int h)
void test_resize(char *filename)
{
image im = load_image(filename, 0,0);
translate_image(im, -128);
image small = resize_image(im, 65, 63);
image big = resize_image(im, 513, 512);
image crop = crop_image(im, 50, 10, 100, 100);
image crop2 = crop_image(im, -30, -50, 291, 400);
image rot = rotate_image(big, .02);
image rot2 = rotate_image(big, 3.14159265/2.);
image test = rotate_image(im, .6);
show_image(im, "original");
show_image(small, "smaller");
show_image(big, "bigger");
show_image(crop, "crop");
show_image(crop2, "crop2");
show_image(rot, "rot");
show_image(rot2, "rot2");
show_image(test, "test");
cvWaitKey(0);
}