Read via QImageReader (#650)

* Now read via QImageReader

* Remove comment-out unused lines

labelImg.py

@@ -1046,6 +1046,9 @@ class MainWindow(QMainWindow, WindowMixin):
                 self.labelFile = None
                 self.canvas.verified = False
 
+            if isinstance(self.imageData, QImage):
+                image = self.imageData
+            else:
                 image = QImage.fromData(self.imageData)
             if image.isNull():
                 self.errorMessage(u'Error opening file',
@@ -1518,8 +1521,9 @@ def inverted(color):
 
 def read(filename, default=None):
     try:
-        with open(filename, 'rb') as f:
-            return f.read()
+        reader = QImageReader(filename)
+        reader.setAutoTransform(True)
+        return reader.read()
     except:
         return default
 

libs/labelFile.py

@@ -43,6 +43,9 @@ class LabelFile(object):
         #imgFileNameWithoutExt = os.path.splitext(imgFileName)[0]
         # Read from file path because self.imageData might be empty if saving to
         # Pascal format
+        if isinstance(imageData, QImage):
+            image = imageData
+        else:
             image = QImage()
             image.load(imagePath)
         imageShape = [image.height(), image.width(),
@@ -70,6 +73,9 @@ class LabelFile(object):
         #imgFileNameWithoutExt = os.path.splitext(imgFileName)[0]
         # Read from file path because self.imageData might be empty if saving to
         # Pascal format
+        if isinstance(imageData, QImage):
+            image = imageData
+        else:
             image = QImage()
             image.load(imagePath)
         imageShape = [image.height(), image.width(),