imStacks: add option for logarithm histogram

matImage/imStacks/SlicerHistogramDialog.m

@@ -41,6 +41,8 @@
 
     useBackground = true;
 
+    logHistogram = false;
+
     displayType = 'bars';
     displayTypeList = {'bars', 'stems', 'stairs'};
 
@@ -255,6 +257,13 @@ function setupDialogLayout(hf)
                 'Value', this.useBackground, ...
                 'Callback',@this.onCountBackgroundChanged);
 
+            % Add a check box for log representation of histogram
+            this.handles.logHistogramCheckBox = uicontrol('Style', 'CheckBox', ...
+                'Parent', mainPanel, ...
+                'String', 'Log Histogram', ...
+                'Value', this.logHistogram, ...
+                'Callback',@this.onLogHistogramChanged);
+
 
             % Add an "auto update" check box
             this.handles.autoUpdateCheckBox = uicontrol('Style', 'CheckBox', ...
@@ -437,6 +446,13 @@ function onCountBackgroundChanged(this, hObject, eventdata) %#ok<INUSD>
         end
     end
 
+    function onLogHistogramChanged(this, hObject, eventdata) %#ok<INUSD>
+        this.logHistogram = get(hObject, 'Value');
+        if this.autoUpdate
+            updateHistogram(this);
+        end
+    end
+
     function onAutoUpdateChanged(this, hObject, eventdata) %#ok<INUSD>
         this.autoUpdate = get(hObject, 'Value');
 
@@ -620,7 +636,11 @@ function displayColorHistogram(this)
             end
         end
 
-
+        % eventually converts to log histogram
+        if this.logHistogram
+            h = log(h + 1);
+        end
+
         function h = calcHistogram(img, x, roi)
             if isempty(roi)
                 % histogram of whole image