Added normImage image normalization method.

normImage.m

@@ -0,0 +1,48 @@
+%% normImage: Normalizes an image
+% img: Image to be normalized
+% INput (img) will be converted to double for the normalization,
+% and converted back to the original datatype before the function returns
+% varargin:
+%           imgMin: Minimum value for normalized image
+%           imgMax: Maximum value for normalized image
+function out = normImage(img, varargin)
+    inClass = class(img);  % Save for later
+    img = double(img);
+    % Determine min and max from call arguments
+    if length(varargin) == 2
+        imgMin = varargin{1};
+        imgMax = varargin{2};
+    elseif isempty(varargin)
+        imgMin = 0;
+        imgMax = 1;
+    else
+        error('Call as normImage(img) or normImage(img, min, max).')
+    end
+    % Perform normalization
+    out = (img - min(img(:)))*(imgMax - imgMin)/(max(img(:)) - min(img(:))) + imgMin;
+
+    % Determine, and cast back to, original datatype
+    if strcmp(inClass, 'double')
+        return
+    else
+        switch inClass
+            case 'int8'
+                out =int8(out);
+            case 'int16'
+                out =int16(out);
+            case 'int32'
+                out =int32(out);
+            case 'int64'
+                out =int64(out);
+            case 'uint8'
+                out =uint8(out);
+            case 'uint16'
+                out =uint16(out);
+            case 'uint32'
+                out =uint32(out);
+            otherwise
+                out = uint64(out);
+        end  % switch
+    end  % else
+
+end  % function