Implement verified feature

When pressing space, the user can flag the image as verified, a green background will appear.
This is used when creating a dataset automatically, the user can then through all the pictures and flag them instead of annotate them.

labelImg.py

@@ -212,6 +212,9 @@ class MainWindow(QMainWindow, WindowMixin):
         openPrevImg = action('&Prev Image', self.openPrevImg,
                              'a', 'prev', u'Open Prev')
 
+        verify = action('&Verify Image', self.verifyImg,
+                        'space', 'verify', u'Verify Image')
+
         save = action('&Save', self.saveFile,
                       'Ctrl+S', 'save', u'Save labels to file', enabled=False)
         saveAs = action('&Save As', self.saveFileAs,
@@ -353,7 +356,7 @@ class MainWindow(QMainWindow, WindowMixin):
 
         self.tools = self.toolbar('Tools')
         self.actions.beginner = (
-            open, opendir, openNextImg, openPrevImg, save, None, create, copy, delete, None,
+            open, opendir, openNextImg, openPrevImg, verify, save, None, create, copy, delete, None,
             zoomIn, zoom, zoomOut, fitWindow, fitWidth)
 
         self.actions.advanced = (
@@ -658,7 +661,9 @@ class MainWindow(QMainWindow, WindowMixin):
 
     def saveLabels(self, annotationFilePath):
         annotationFilePath = u(annotationFilePath)
-        lf = LabelFile()
+        if self.labelFile is None:
+            self.labelFile = LabelFile()
+            self.labelFile.verified = self.canvas.verified
 
         def format_shape(s):
             return dict(label=s.label,
@@ -674,12 +679,11 @@ class MainWindow(QMainWindow, WindowMixin):
             if self.usingPascalVocFormat is True:
                 print ('Img: ' + self.filePath +
                        ' -> Its xml: ' + annotationFilePath)
-                lf.savePascalVocFormat(annotationFilePath, shapes, self.filePath, self.imageData,
+                self.labelFile.savePascalVocFormat(annotationFilePath, shapes, self.filePath, self.imageData,
                                                    self.lineColor.getRgb(), self.fillColor.getRgb())
             else:
-                lf.save(annotationFilePath, shapes, self.filePath, self.imageData,
+                self.labelFile.save(annotationFilePath, shapes, self.filePath, self.imageData,
                                     self.lineColor.getRgb(), self.fillColor.getRgb())
-                self.labelFile = lf
             return True
         except LabelFileError as e:
             self.errorMessage(u'Error saving label data',
@@ -829,7 +833,9 @@ class MainWindow(QMainWindow, WindowMixin):
                 xmlPath = os.path.join(self.defaultSaveDir, basename)
                 self.loadPascalXMLByFilename(xmlPath)
 
-            self.canvas.setFocus()
+            self.setWindowTitle('{} - {}'.format(__appname__, filePath))
+
+            self.canvas.setFocus(True)
             return True
         return False
 
@@ -970,6 +976,21 @@ class MainWindow(QMainWindow, WindowMixin):
             item = QListWidgetItem(imgPath)
             self.fileListWidget.addItem(item)
 
+    def verifyImg(self, _value=False):
+        # Proceding next image without dialog if having any label
+         if self.filePath is not None:
+            try:
+                self.labelFile.toggleVerify()
+            except AttributeError:
+                # If the labelling file does not exist yet, create if and
+                # re-save it with the verified attribute.
+                self.saveFile()
+                self.labelFile.toggleVerify()
+
+            self.canvas.verified = self.labelFile.verified
+            self.paintCanvas()
+            self.saveFile()
+
     def openPrevImg(self, _value=False):
         if not self.mayContinue():
             return
@@ -1156,6 +1177,7 @@ class MainWindow(QMainWindow, WindowMixin):
         tVocParseReader = PascalVocReader(xmlPath)
         shapes = tVocParseReader.getShapes()
         self.loadLabels(shapes)
+        self.canvas.verified = tVocParseReader.verified
 
 
 class Settings(object):

libs/canvas.py

@@ -59,6 +59,7 @@ class Canvas(QWidget):
         # Set widget options.
         self.setMouseTracking(True)
         self.setFocusPolicy(Qt.WheelFocus)
+        self.verified = False
 
     def enterEvent(self, ev):
         self.overrideCursor(self._cursor)
@@ -419,6 +420,16 @@ class Canvas(QWidget):
             p.setBrush(brush)
             p.drawRect(leftTop.x(), leftTop.y(), rectWidth, rectHeight)
 
+        self.setAutoFillBackground(True)
+        if self.verified:
+            pal = self.palette()
+            pal.setColor(self.backgroundRole(), QColor(184, 239, 38, 128))
+            self.setPalette(pal)
+        else:
+            pal = self.palette()
+            pal.setColor(self.backgroundRole(), QColor(232, 232, 232, 255))
+            self.setPalette(pal)
+
         p.end()
 
     def transformPos(self, point):

libs/labelFile.py

@@ -24,8 +24,7 @@ class LabelFile(object):
         self.shapes = ()
         self.imagePath = None
         self.imageData = None
-        if filename is not None:
-            self.load(filename)
+        self.verified = False
 
     def savePascalVocFormat(self, filename, shapes, imagePath, imageData,
                             lineColor=None, fillColor=None, databaseSrc=None):
@@ -41,6 +40,8 @@ class LabelFile(object):
                       1 if image.isGrayscale() else 3]
         writer = PascalVocWriter(imgFolderName, imgFileNameWithoutExt,
                                  imageShape, localImgPath=imagePath)
+        writer.verified = self.verified
+
         for shape in shapes:
             points = shape['points']
             label = shape['label']
@@ -50,6 +51,9 @@ class LabelFile(object):
         writer.save(targetFile=filename)
         return
 
+    def toggleVerify(self):
+        self.verified = not self.verified
+
     @staticmethod
     def isLabelFile(filename):
         fileSuffix = os.path.splitext(filename)[1].lower()
@@ -72,10 +76,10 @@ class LabelFile(object):
         # Martin Kersner, 2015/11/12
         # 0-valued coordinates of BB caused an error while
         # training faster-rcnn object detector.
-        if (xmin < 1):
+        if xmin < 1:
             xmin = 1
 
-        if (ymin < 1):
+        if ymin < 1:
             ymin = 1
 
         return (int(xmin), int(ymin), int(xmax), int(ymax))

libs/pascal_voc_io.py

@@ -19,6 +19,7 @@ class PascalVocWriter:
         self.imgSize = imgSize
         self.boxlist = []
         self.localImgPath = localImgPath
+        self.verified = False
 
     def prettify(self, elem):
         """
@@ -39,6 +40,8 @@ class PascalVocWriter:
             return None
 
         top = Element('annotation')
+        top.set('verified', 'yes' if self.verified else 'no')
+
         folder = SubElement(top, 'folder')
         folder.text = self.foldername
 
@@ -119,6 +122,7 @@ class PascalVocReader:
         # [labbel, [(x1,y1), (x2,y2), (x3,y3), (x4,y4)], color, color]
         self.shapes = []
         self.filepath = filepath
+        self.verified = False
         self.parseXML()
 
     def getShapes(self):
@@ -137,6 +141,12 @@ class PascalVocReader:
         parser = etree.XMLParser(encoding='utf-8')
         xmltree = ElementTree.parse(self.filepath, parser=parser).getroot()
         filename = xmltree.find('filename').text
+        try:
+            verified = xmltree.attrib['verified']
+            if verified == 'yes':
+                self.verified = True
+        except AttributeError:
+            self.verified = False
 
         for object_iter in xmltree.findall('object'):
             bndbox = object_iter.find("bndbox")