Files
matlab/chromakey/clip_black.m
T
jens 58b94067b1 - added alpha matte clip
git-svn-id: http://moon:8086/svn/matlab/trunk@149 801c6759-fa7c-4059-a304-17956f83a07c
2020-10-04 17:14:54 +00:00

33 lines
1003 B
Objective-C

## Copyright (C) 2020 Jens
##
## This program is free software: you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program. If not, see
## <https://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {} {@var{retval} =} clip_black (@var{input1}, @var{input2})
##
## @seealso{}
## @end deftypefn
## Author: Jens <jens@orion>
## 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);
endfunction