| | |
| | | #include "image.h" |
| | | #include "utils.h" |
| | | #include <stdio.h> |
| | | #include <math.h> |
| | | |
| | | int windows = 0; |
| | | |
| | |
| | | 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) |
| | |
| | | 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); |
| | | } |
| | | |