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Switch to fast resize

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This commit is contained in:
Joseph Redmon
2015-07-21 11:46:24 -07:00
parent 8ed0a5538e
commit e56d1eff13
5 changed files with 7 additions and 43 deletions
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25
src/image.c
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@ -332,7 +332,7 @@ image rotate_image(image im, float rad)
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);
float val = bilinear_interpolate(im, rx, ry, c);
set_pixel(rot, x, y, c, val);
}
}
@ -549,7 +549,7 @@ void saturate_exposure_image(image im, float sat, float exposure)
}
*/
float billinear_interpolate(image im, float x, float y, int c)
float bilinear_interpolate(image im, float x, float y, int c)
{
int ix = (int) floorf(x);
int iy = (int) floorf(y);
@ -564,27 +564,7 @@ float billinear_interpolate(image im, float x, float y, int c)
return val;
}
// #wikipedia
image resize_image(image im, int w, int h)
{
image resized = make_image(w, h, im.c);
int r, c, k;
float w_scale = (float)(im.w - 1) / (w - 1);
float h_scale = (float)(im.h - 1) / (h - 1);
for(k = 0; k < im.c; ++k){
for(r = 0; r < h; ++r){
for(c = 0; c < w; ++c){
float sx = c*w_scale;
float sy = r*h_scale;
float val = billinear_interpolate(im, sx, sy, k);
set_pixel(resized, c, r, k, val);
}
}
}
return resized;
}
image resize_image2(image im, int w, int h)
{
image resized = make_image(w, h, im.c);
image part = make_image(w, im.h, im.c);
@ -607,7 +587,6 @@ image resize_image2(image im, int w, int h)
}
}
}
for(k = 0; k < im.c; ++k){
for(r = 0; r < h; ++r){
float sy = r*h_scale;