76 lines
2.1 KiB
Objective-C
76 lines
2.1 KiB
Objective-C
## Copyright (C) 2020 Jens
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##
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## This program is free software: you can redistribute it and/or modify it
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## under the terms of the GNU General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful, but
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## WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program. If not, see
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## <https://www.gnu.org/licenses/>.
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## -*- texinfo -*-
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## @deftypefn {} {@var{retval} =} bluescreen (@var{input1}, @var{input2})
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##
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## @seealso{}
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## @end deftypefn
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## Author: Jens <jens@orion>
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## Created: 2020-10-03
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# chromakey('adventure_rose', 20, 10)
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# chromakey('cineon_before', 200, 100)
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function eval_matte (prj_name, k_e_matte)
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clip_white_thresh = 0.80;
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clip_white_amp = 3;
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clip_black_thresh = 0.20;
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clip_black_amp = 3;
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[im_rgb, ref_rgb] = prj_load(prj_name);
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close all;
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pre_filtered = im_rgb - ref_rgb;
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pre_filtered_p = max(0,pre_filtered);
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pre_filtered_n = -min(0,pre_filtered);
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figure;
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imshow(abs(pre_filtered)); title("pre_filtered")
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figure;
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filtered_var = var(pre_filtered, 0, 3);
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kn = 1/max(max(filtered_var(:)))
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var_n = k_e_matte*kn*filtered_var;
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matte = min(1, var_n);
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imshow(matte); title("var")
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figure;
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filtered_norm = vecnorm(pre_filtered, 2, 3);
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imshow(filtered_norm); title("norm")
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figure;
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intermediate = im_rgb.*matte;
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imshow(intermediate); title("intermediate")
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figure;
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edges = exp(-1.7*k_e_matte*var(intermediate - ref_rgb, 0, 3));
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imshow(edges); title("edges")
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figure;
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final = intermediate - edges.*ref_rgb;
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imshow(final); title("final")
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imwrite(intermediate, sprintf('%s.intermediate.png',prj_name),'png','alpha', matte);
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imwrite(edges, sprintf('%s.edges.png',prj_name),'png');
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imwrite(final, sprintf('%s.final.png',prj_name),'png','alpha', matte);
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