Initial autostretch

stretchpanel.cpp

@@ -1,5 +1,7 @@
 #include "stretchpanel.h"
 #include <QVBoxLayout>
+#include "imageringlist.h"
+#include <QDebug>
 
 StretchPanel::StretchPanel(QWidget *parent) : QWidget(parent)
 {
@@ -33,6 +35,24 @@ StretchPanel::StretchPanel(QWidget *parent) : QWidget(parent)
     connect(m_stretchSelect, SIGNAL(activated(int)), this, SLOT(calculateParam()));
 }
 
+void StretchPanel::imageLoaded(Image *img)
+{
+    if(img)
+    {
+        if(img->rawImage())
+        {
+            double mean, stdDev, median;
+            img->rawImage()->imageStats(&mean, &stdDev, &median, nullptr, nullptr);
+            double mad = img->rawImage()->MAD();
+            float l = median - mad;
+            m_lowSlider->setValue(l);
+            float p = std::log(0.25)/std::log(mean/UINT16_MAX);
+            m_paramSlider->setValue(p * UINT16_MAX);
+            qDebug() << "Low" << l << p;
+        }
+    }
+}
+
 void StretchPanel::calculateParam()
 {
     float val = m_paramSlider->value();
@@ -40,14 +60,16 @@ void StretchPanel::calculateParam()
     switch(m_stretchSelect->currentIndex())
     {
     case 2:
-        param = val*100/UINT16_MAX;
+        param = val/UINT16_MAX;
+        param = 1.0f / (param * 5.0f + 1);
         break;
     case 3:
         param = val;
         break;
     case 4:
-        val += 100;
-        param = val/100.0f;
+        param = 1.0f/std::max(0.00001f, 1.0f-(val/UINT16_MAX));
+        //val += 100;
+        //param = val/100.0f;
         break;
     default:
         return;