/usr/share/psychtoolbox-3/PsychBasic/PsychCV.m is in psychtoolbox-3-common 3.0.14.20170103+git6-g605ff5c.dfsg1-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | function varargout = PsychCV(varargin)
% PsychCV is a MEX file for computer-vision applications. PsychCV has
% many functions; type "PsychCV" for a list:
% PsychCV
%
% Please note that PsychCV is only supported on recent platforms, e.g.,
% Matlab versions 7.4 (R2007a) and later or Octave-3 on Windows, and only
% on Intel based Macintosh computers under OS/X but not on PowerPC
% machines.
%
fprintf('Please note that PsychCV is only supported on few platforms,\n');
fprintf('and only for use with GNU/Octave, not with Matlab.\n');
fprintf('If you get some MEX file not found error, then your hardware/operating system combo\n');
fprintf('version is not supported by PsychCV yet.\n\n');
AssertMex('PsychCV.m');
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