diff --git a/imageringlist.cpp b/imageringlist.cpp
index 90dc15f..a8cd5d9 100644
--- a/imageringlist.cpp
+++ b/imageringlist.cpp
@@ -5,13 +5,14 @@
 
 using namespace std;
 
-const int DEFAULT_WIDTH = 3;
+const int DEFAULT_WIDTH = 2;
 
-Image::Image(const QString name) :
+Image::Image(const QString name, ImageRingList *ringList) :
     m_loading(false),
     m_released(true),
     m_current(false),
-    m_name(name)
+    m_name(name),
+    m_ringList(ringList)
 {
 }
 
@@ -21,7 +22,7 @@ void Image::load()
     {
         m_loading = true;
         m_released = false;
-        QThreadPool::globalInstance()->start(new LoadRunable(m_name, this));
+        QThreadPool::globalInstance()->start(new LoadRunable(m_name, this, m_ringList->calculateStats()));
     }
     if(!m_loading && !m_pixmap.isNull())
         emit pixmapLoaded(this);
@@ -67,6 +68,7 @@ void Image::imageLoaded(QImage img, ImageInfoData info)
 
 ImageRingList::ImageRingList(QObject *parent) : QObject(parent)
   , m_liveMode(false)
+  , m_calculateStats(false)
 {
     connect(&m_fileSystemWatcher, SIGNAL(directoryChanged(QString)), this, SLOT(dirChanged(QString)));
 }
@@ -146,6 +148,16 @@ void ImageRingList::setLiveMode(bool live)
     m_liveMode = live;
 }
 
+void ImageRingList::setCalculateStats(bool stats)
+{
+    m_calculateStats = stats;
+}
+
+bool ImageRingList::calculateStats() const
+{
+    return m_calculateStats;
+}
+
 void ImageRingList::setFiles(const QStringList files, const QString &currentFile)
 {
     QThreadPool::globalInstance()->clear();
@@ -153,7 +165,7 @@ void ImageRingList::setFiles(const QStringList files, const QString &currentFile
     m_images.clear();
     foreach(const QString &file, files)
     {
-        ImagePtr ptr = make_shared<Image>(file);
+        ImagePtr ptr = make_shared<Image>(file, this);
         connect(ptr.get(), SIGNAL(pixmapLoaded(Image*)), this, SLOT(imageLoaded(Image*)));
         m_images.append(ptr);
     }
diff --git a/imageringlist.h b/imageringlist.h
index 04832be..4d2d8aa 100644
--- a/imageringlist.h
+++ b/imageringlist.h
@@ -8,6 +8,8 @@
 #include <memory>
 #include "imageinfo.h"
 
+class ImageRingList;
+
 class Image : public QObject
 {
     Q_OBJECT
@@ -17,8 +19,9 @@ class Image : public QObject
     QPixmap m_pixmap;
     QString m_name;
     ImageInfoData m_info;
+    ImageRingList *m_ringList;
 public:
-    explicit Image(const QString name);
+    explicit Image(const QString name, ImageRingList *ringList);
     void load();
     void release();
     QString name() const;
@@ -43,6 +46,7 @@ class ImageRingList : public QObject
     QList<ImagePtr>::iterator m_lastImage;
     QFileSystemWatcher m_fileSystemWatcher;
     bool m_liveMode;
+    bool m_calculateStats;
 public:
     explicit ImageRingList(QObject *parent = 0);
     ~ImageRingList();
@@ -52,6 +56,8 @@ public:
     void increment();
     void decrement();
     void setLiveMode(bool live);
+    void setCalculateStats(bool stats);
+    bool calculateStats() const;
 protected:
     void setFiles(const QStringList files, const QString &currentFile = QString());
     QList<ImagePtr>::iterator increment(QList<ImagePtr>::iterator iter);
diff --git a/loadrunable.cpp b/loadrunable.cpp
index 7d2ff17..bf75ca0 100644
--- a/loadrunable.cpp
+++ b/loadrunable.cpp
@@ -7,9 +7,10 @@
 #include <fitsio2.h>
 #include "rawimage.h"
 
-LoadRunable::LoadRunable(const QString &file, Image *receiver) :
+LoadRunable::LoadRunable(const QString &file, Image *receiver, bool stats) :
     m_file(file),
-    m_receiver(receiver)
+    m_receiver(receiver),
+    m_calculateStats(stats)
 {
 }
 
@@ -57,7 +58,7 @@ bool loadRAW(QString path,  ImageInfoData &info, RawImageAbs **image, QImage *qi
                 out[d++] = p;
             }
         }
-        *image = new RawImage<uint16_t>(w, h, out);
+        *image = new RawImage<uint16_t>(rawdata.sizes.width, rawdata.sizes.height, out);
     }
 
     if(qimage)
@@ -199,21 +200,19 @@ void LoadRunable::run()
     QFileInfo finfo(m_file);
     info.append(StringPair(QObject::tr("Filename"), finfo.fileName()));
 
+    QImage img;
+    RawImageAbs *rawImage = nullptr;
     if(m_file.endsWith(".CR2", Qt::CaseInsensitive))
     {
-        QImage img;
-        loadRAW(m_file, info, nullptr, &img);
-        QMetaObject::invokeMethod(m_receiver, "imageLoaded", Qt::QueuedConnection, Q_ARG(QImage, img), Q_ARG(ImageInfoData, info));
+        loadRAW(m_file, info, m_calculateStats ? &rawImage : nullptr, &img);
     }
     else if(m_file.endsWith(".FIT", Qt::CaseInsensitive))
     {
-        QImage img;
-        if(loadFITS(m_file, info, nullptr, &img))
-            QMetaObject::invokeMethod(m_receiver, "imageLoaded", Qt::QueuedConnection, Q_ARG(QImage, img), Q_ARG(ImageInfoData, info));
+        loadFITS(m_file, info, m_calculateStats ? &rawImage : nullptr, &img);
     }
     else
     {
-        QImage img(m_file);
+        img = QImage(m_file);
         ExifData *exif = exif_data_new_from_file(m_file.toLocal8Bit().constData());
         info.append(StringPair(QObject::tr("Width"), QString::number(img.width())));
         info.append(StringPair(QObject::tr("Height"), QString::number(img.height())));
@@ -221,7 +220,21 @@ void LoadRunable::run()
         {
             loadExifEntry(info, exif->ifd[EXIF_IFD_EXIF], EXIF_TAG_ISO_SPEED_RATINGS);
             loadExifEntry(info, exif->ifd[EXIF_IFD_EXIF], EXIF_TAG_SHUTTER_SPEED_VALUE);
+            exif_data_free(exif);
         }
-        QMetaObject::invokeMethod(m_receiver, "imageLoaded", Qt::QueuedConnection, Q_ARG(QImage, img), Q_ARG(ImageInfoData, info));
     }
+
+    if(rawImage)
+    {
+        uint64_t mean, median, min, max;
+        double stdDev;
+        rawImage->imageStats(&mean, &stdDev, &median, &min, &max);
+        info.append(StringPair(QObject::tr("Mean"), QString::number(mean)));
+        info.append(StringPair(QObject::tr("Standart deviation"), QString::number(stdDev)));
+        info.append(StringPair(QObject::tr("Median"), QString::number(median)));
+        info.append(StringPair(QObject::tr("Minimum"), QString::number(min)));
+        info.append(StringPair(QObject::tr("Maximum"), QString::number(max)));
+    }
+
+    QMetaObject::invokeMethod(m_receiver, "imageLoaded", Qt::QueuedConnection, Q_ARG(QImage, img), Q_ARG(ImageInfoData, info));
 }
diff --git a/loadrunable.h b/loadrunable.h
index 315cbcb..60724b0 100644
--- a/loadrunable.h
+++ b/loadrunable.h
@@ -10,8 +10,9 @@ class LoadRunable : public QRunnable
 {
     QString m_file;
     Image *m_receiver;
+    bool m_calculateStats;
 public:
-    LoadRunable(const QString &file, Image *receiver);
+    LoadRunable(const QString &file, Image *receiver, bool stats);
     void run();
 };
 
diff --git a/mainwindow.cpp b/mainwindow.cpp
index ce52e3c..dc1b16a 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -62,6 +62,13 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent),
     selectMenu->addAction(tr("Unmark and next"), this, SLOT(unmarkAndNext()), Qt::Key_X);
     menuBar()->addMenu(selectMenu);
 
+    QMenu *statsMenu = new QMenu(tr("Statistic"), this);
+    QAction *statsAction = new QAction(tr("Image statistics"), this);
+    statsAction->setCheckable(true);
+    connect(statsAction, SIGNAL(toggled(bool)), this, SLOT(imageStats(bool)));
+    statsMenu->addAction(statsAction);
+    menuBar()->addMenu(statsMenu);
+
     m_database = new Database(this);
     if(!m_database->init())
         QMessageBox::critical(this, tr("Can't open DB"), tr("Can't open SQLITE database"));
@@ -240,6 +247,11 @@ void MainWindow::liveMode(bool active)
     m_ringList->setLiveMode(active);
 }
 
+void MainWindow::imageStats(bool imageStats)
+{
+    m_ringList->setCalculateStats(imageStats);
+}
+
 void MainWindow::updateWindowTitle()
 {
     ImagePtr ptr = m_ringList->currentImage();
diff --git a/mainwindow.h b/mainwindow.h
index cd3747e..bfe57c5 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -38,6 +38,7 @@ protected slots:
     void unmarkAndNext();
     void copyMarked();
     void liveMode(bool active);
+    void imageStats(bool imageStats);
 };
 
 #endif // MAINWINDOW_H