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////////////////////////////////////////////////////////////
// SIVP - Scilab Image and Video Processing toolbox
// Copyright (C) 2006 Shiqi Yu
//
// 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 2 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, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
////////////////////////////////////////////////////////////
function [im2] = imcomplement(im)
imtype = typeof(im(1));
//// because hypermat can not +-*/ with an integer scalar
//// so we have to convert the data to double first
//// After the bug is fixed, we can reuse the following code.
// select imtype
// case 'boolean' then
// im2 = ~im;
// case 'uint8' then
// im2 = uint8(- int16(im) + int16(255));
// case 'int8' then
// im2 = int8(-int16(im)-int16(1));
// case 'uint16' then
// im2 = uint16(-int32(im) + int32(2^16-1));
// case 'int16' then
// im2 = int16(-int32(im)-int32(1));
// case 'int32' then
// im2 = int32(-double(im)-1);
// case 'constant' then
// im2 = 1.0 - im;
// else
// error("Data type " + imtype + " is not supported.");
// end
// convert im to double is not efficient enough
select imtype
case 'boolean' then
im2 = ~im;
case 'uint8' then
im2 = uint8(- double(im) + 255);
case 'int8' then
im2 = int8(-double(im)-double(1));
case 'uint16' then
im2 = uint16(-double(im) + double(2^16-1));
case 'int16' then
im2 = int16(-double(im)-double(1));
case 'int32' then
im2 = int32(-double(im)-1);
case 'constant' then
im2 = 1.0 - im;
else
error("Data type " + imtype + " is not supported.");
end
endfunction
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