SoftThresholding: finally fixed ill cases (no threshold or multiple threshold passed)

This generates a warning, in ill cases

Signed-off-by: Nicola Vigano <nicola.vigano@esrf.fr>

git-svn-id: https://svn.code.sf.net/p/dct/code/trunk@641 4c865b51-4357-4376-afb4-474e03ccb993

zUtil_Imaging/gtSoftThreshold.m

@@ -2,7 +2,15 @@ function img = gtSoftThreshold(img, thr)
 % GTSOFTTHRESHOLD Applies soft thresholding to the image
 %   img = gtSoftThreshold(img, thr)
 
-    thr = min(thr(:));
+    if (numel(thr) > 1)
+        warning('THRESHOLDING:wrong_argument', ...
+                'Expected one threshold, but got: %d', length(thr))
+        thr = min(thr(:));
+    elseif (isempty(thr))
+        warning('THRESHOLDING:wrong_argument', ...
+                'Expected one threshold, an EMPTY array was passed!')
+        thr = 0;
+    end
 
     tempImg = abs(img) - thr;
     tempImg = (tempImg + abs(tempImg)) / 2;