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probably stuff changed

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This commit is contained in:
Joseph Redmon
2015-04-13 14:09:55 -07:00
parent 390a0cf923
commit b0106d7bde
11 changed files with 102 additions and 27 deletions
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79
src/image.c
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@ -150,7 +150,6 @@ image copy_image(image p)
return copy;
}
void show_image(image p, char *name)
{
int x,y,k;
@ -317,7 +316,7 @@ image crop_image(image im, int dx, int dy, int w, int h)
for(i = 0; i < w; ++i){
int r = j + dy;
int c = i + dx;
float val = 128;
float val = 0;
if (r >= 0 && r < im.h && c >= 0 && c < im.w) {
val = get_pixel(im, c, r, k);
}
@ -328,6 +327,54 @@ image crop_image(image im, int dx, int dy, int w, int h)
return cropped;
}
image grayscale_image(image im)
{
assert(im.c == 3);
int i, j, k;
image gray = make_image(im.w, im.h, im.c);
float scale[] = {0.114, 0.587, 0.299};
for(k = 0; k < im.c; ++k){
for(j = 0; j < im.h; ++j){
for(i = 0; i < im.w; ++i){
gray.data[i+im.w*j] += scale[k]*get_pixel(im, i, j, k);
}
}
}
memcpy(gray.data + im.w*im.h*1, gray.data, sizeof(float)*im.w*im.h);
memcpy(gray.data + im.w*im.h*2, gray.data, sizeof(float)*im.w*im.h);
return gray;
}
image blend_image(image fore, image back, float alpha)
{
assert(fore.w == back.w && fore.h == back.h && fore.c == back.c);
image blend = make_image(fore.w, fore.h, fore.c);
int i, j, k;
for(k = 0; k < fore.c; ++k){
for(j = 0; j < fore.h; ++j){
for(i = 0; i < fore.w; ++i){
float val = alpha * get_pixel(fore, i, j, k) +
(1 - alpha)* get_pixel(back, i, j, k);
set_pixel(blend, i, j, k, val);
}
}
}
return blend;
}
image saturate_image(image im, float sat)
{
image gray = grayscale_image(im);
image blend = blend_image(im, gray, sat);
free_image(gray);
return blend;
}
image brightness_image(image im, float b)
{
image bright = make_image(im.w, im.h, im.c);
}
float billinear_interpolate(image im, float x, float y, int c)
{
int ix = (int) floorf(x);
@ -337,9 +384,9 @@ float billinear_interpolate(image im, float x, float y, int c)
float dy = y - iy;
float val = (1-dy) * (1-dx) * get_pixel_extend(im, ix, iy, c) +
dy * (1-dx) * get_pixel_extend(im, ix, iy+1, c) +
(1-dy) * dx * get_pixel_extend(im, ix+1, iy, c) +
dy * dx * get_pixel_extend(im, ix+1, iy+1, c);
dy * (1-dx) * get_pixel_extend(im, ix, iy+1, c) +
(1-dy) * dx * get_pixel_extend(im, ix+1, iy, c) +
dy * dx * get_pixel_extend(im, ix+1, iy+1, c);
return val;
}
@ -374,14 +421,22 @@ void test_resize(char *filename)
image rot = rotate_image(big, .02);
image rot2 = rotate_image(big, 3.14159265/2.);
image test = rotate_image(im, .6);
image gray = grayscale_image(im);
image sat = saturate_image(im, 2);
image sat2 = saturate_image(im, .5);
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");
show_image(gray, "gray");
show_image(sat, "sat");
show_image(sat2, "sat2");
/*
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);
}