helper tool for figures: addToolsToToolbar. adds a crop and autoContrastbutton to figures

functions/plotting/addAutoContrastToToolbar.m

-function addAutoContrastToToolbar()
-% ADDAUTOCONTRASTTOTOOLBAR adds an button in the toolbar to easily access
-% the autoContrast function.
-%
-%    ``addAutoContrastToToolbar()``
-%
-% This function alters the behavior of all figure windows after invocation.
-% It alters the default function which is called by matlab upon creation of
-% a new figure. Afterwards new figures have a new tool represented by a
-% light bulb to adjust the contrast of an image.
-%
-% Returns
-% -------
-% This function changes the behavior of all figure created after
-% invocation.
-%
-% See also
-% --------
-% autoContrast
-%
-% Example
-% -------
-%
-% .. code-block:: matlab
-%
-%     addAutoContrastToToolbar()
-%     figure; 
-%     imagesc(rand(128))
-
-% HoloTomoToolbox
-% Copyright (C) 2019  Institut fuer Roentgenphysik, Universitaet Goettingen
-%
-% 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 <http://www.gnu.org/licenses/>.
-%
-
-fig_cmd = ...
-    ['addToolbarExplorationButtons(gcf);'...
-    'AutoContrastBtn = uipushtool(uitoolbar(gcf),''TooltipString'',''Auto Contrast Tool'', ''ClickedCallback'',''eval(''''autoContrast'''')'');'...
-    '[img,map] = imread(fullfile(matlabroot,''toolbox'',''matlab'',''icons'',''demoicon.gif''));'...
-    'AutoContrastBtn.CData = ind2rgb(img,map); '];
-set(groot,'defaultFigureCreateFcn',fig_cmd)
-
-end

functions/plotting/autoContrast.m

@@ -5,7 +5,7 @@ function autoCaxis = autoContrast(region)
 % ----------
 % region : region
 %     Region for which the contrast is optimized. If no input is given, the region is
-%     selected manually by drawing a rectangle in the current figure.
+%     selected manually by drawing a rectangle (imrect) in the current figure.
 %
 % Returns
 % -------
@@ -55,12 +55,9 @@ imageOriginal = getimage(currentFig);
 
 % create mask
 dimMask = round(region.getPosition);
-mask = zeros(size(imageOriginal));
-mask(dimMask(2):dimMask(2)+dimMask(4)-1,dimMask(1):dimMask(1)+dimMask(3)-1) = 1;
 
 % only consider part of the image which lies within specified region
-imageRegion = imageOriginal(mask==1);
-imageRegion = reshape(imageRegion, dimMask(4), dimMask(3));
+imageRegion = imageOriginal(dimMask(2):dimMask(2)+dimMask(4)-1,dimMask(1):dimMask(1)+dimMask(3)-1);
 
 % apply median and averaging filter to remove outliers from the image which
 % would otherwise lead to incorrect minimum and maximum values