fix double image entropy calculation issue

app/Operations/DoubleEntropyOp.cpp

@@ -39,10 +39,12 @@ DoubleEntropyOp::DoubleEntropyOp() : DoubleOperation(qApp->translate("Operations
 void DoubleEntropyOp::operator()(const Image_t<double>* image, const std::map<const imagein::Image_t<double>*, std::string>&) {
 
     double entropy = 0.;
-
+    int min = image->min();
+    int max = image->max();
     for(unsigned int c = 0; c < image->getNbChannels(); ++c) {
         Histogram histo = image->getHistogram(c);
-        for(int i = 0; i < 256; ++i) {
+//      for(int i = -255; i < 256 ; ++i) {
+        for(int i = min; i<= max; i++){
             if(histo[i] > 0) {
                 double p = (double)histo[i] / image->getWidth() /image->getHeight();
                 entropy +=  p * log(p);
@@ -52,8 +54,12 @@ void DoubleEntropyOp::operator()(const Image_t<double>* image, const std::map<co
 
     entropy = - entropy / log(2);
     outText(qApp->translate("Operations", "Entropy of the image = %1").arg(entropy).toStdString());
+
 }
 
 bool DoubleEntropyOp::needCurrentImg() const {
     return true;
 }
+
+DoubleEntropyOp::~DoubleEntropyOp() {
+}

app/Operations/DoubleEntropyOp.h

@@ -27,6 +27,8 @@ class DoubleEntropyOp : public DoubleOperation
 public:
     DoubleEntropyOp();
 
+    virtual ~DoubleEntropyOp();
+
     void operator()(const imagein::Image_t<double>*, const std::map<const imagein::Image_t<double>*, std::string>&);
 
     bool needCurrentImg() const;

app/Operations/EntropyOp.cpp

@@ -57,3 +57,6 @@ void EntropyOp::operator()(const Image* image, const std::map<const imagein::Ima
 bool EntropyOp::needCurrentImg() const {
     return true;
 }
+
+EntropyOp::~EntropyOp() {
+}

app/Operations/EntropyOp.h

@@ -27,6 +27,8 @@ class EntropyOp : public Operation
 public:
     EntropyOp();
 
+    virtual ~EntropyOp();
+
     void operator()(const imagein::Image*, const std::map<const imagein::Image*, std::string>&);
 
     bool needCurrentImg() const;

detiq-t @ 8f5e49b9

-Subproject commit 9376ae7717171c4a1e7ab4027f2d656742689763
+Subproject commit 8f5e49b95200fc47fffcb06bf7a2a612ea72464e