gtCheckDiffractionBlobs: added pixel info

Signed-off-by: preischig <preischig@gmail.com>

2_difspot/gtCheckDiffractionBlobs.m

@@ -25,6 +25,12 @@ end
 
 % Initialization
 app = sfInitialise(startndx);
+app.pix = [];
+
+% Image Processing Toolbox license test before callling impixelinfo
+% This is to avoid crashing when no license is available.
+showpix = license('checkout','Image_Toolbox');
+
 
 disp('KEYS:');
 disp('  Arrows - 1 index shift (10 indexes by pressing Shift)');
@@ -65,7 +71,8 @@ sfUpdateFigure();
         
         conf.quit  = false;
         %conf.block = 'off';
-        
+        conf.image = [];
+		
         % Let's create the figure
         conf.window = figure( ...
                 'Name', 'Segmented diffraction blobs', ...
@@ -129,10 +136,17 @@ sfUpdateFigure();
 
     function sfUpdateFigure()
         img = sum(gtDBBrowseDiffractionVolume(app.scanName, app.index), 3);
-        imagesc(img, 'Parent', app.axes1);
+        delete(app.image);
+		app.image = imagesc(img, 'Parent', app.axes1);
         axis(app.axes1, 'image');
         title_str = sprintf('Blob %d / %d', app.index, app.indexMax);
         title(app.axes1, title_str);
+		
+		% Image pixel values (needs to be called each time image changes)
+		if showpix
+			% add pixel info (it deletes automatically when image is deleted) 
+			app.pix = impixelinfoval(app.window, app.image);
+		end
     end
 
     function closeFigure(~, ~)