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- improved clipping

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- matte is clipped matte white

git-svn-id: http://moon:8086/svn/matlab/trunk@150 801c6759-fa7c-4059-a304-17956f83a07c
This commit is contained in:
jens
2020-10-07 19:50:13 +00:00
parent 58b94067b1
commit 130f83a27f
3 changed files with 8 additions and 12 deletions
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chromakey/chromakey.m
+6 -5
View File
@@ -29,11 +29,11 @@
function chromakey (prj_name, k_e_matte, k_e_edge)
k_ds_matte = 1.0;
clip_white_thresh = 0.80;
clip_white_amp = 3;
clip_white_thresh = 0.60;
clip_white_amp = 5;
clip_black_thresh = 0.20;
clip_black_amp = 3;
clip_black_thresh = 0.40;
clip_black_amp = 5;
[im_rgb, ref_rgb] = prj_load(prj_name);
@@ -47,7 +47,8 @@ figure;
imshow(conf); title("conf")
matte_clipped_w = clip_white(matte, clip_white_thresh, clip_white_amp);
matte_clipped_b = clip_black(matte, clip_black_thresh, clip_black_amp);
matte_clipped_b = clip_black(matte_clipped_w, clip_black_thresh, clip_black_amp);
matte = matte_clipped_w;
figure;
imshow(matte_clipped_w.*matte_clipped_b); title("matte_{clipped}")
chromakey/clip_black.m
+1 -3
View File
@@ -24,9 +24,7 @@
## Created: 2020-10-04
function y = clip_black (x, thresh, k)
ind = find (x >= thresh);
y = x/k;
y(ind) = thresh/k + (x(ind)-thresh)*(1+thresh);
y = 1 - min(1, exp(-k*max(0,((1-thresh)-(1-x)))));
endfunction
chromakey/clip_white.m
+1 -4
View File
@@ -25,9 +25,6 @@
function y = clip_white (x, thresh, k)
ind = find (x >= thresh);
y = x;
y(ind) = thresh + (x(ind)-thresh)*k;
y = min(1, exp(-k*max(0,(thresh-x))) - exp(-k*thresh));
endfunction