[skeleton] add body length indicator

fixtracks/widgets/skeleton.py

@@ -10,9 +10,11 @@ from fixtracks.widgets.detectionview import DetectionData
 
 class Skeleton(QGraphicsRectItem):
     skeleton_grid = [(0, 1), (1, 2), (1, 3), (1, 4), (2, 5)]
+    bodyaxis = [0, 1, 2, 5]
 
     def __init__(self, x, y, width, height, keypoint_coordinates, brush):
         super().__init__(x, y, width, height)
+        self._keypoints = keypoint_coordinates
         skeleton_pen = QPen(brush.color())
         skeleton_pen.setWidthF(1.0)
         skeleton_marker = 5
@@ -37,6 +39,17 @@ class Skeleton(QGraphicsRectItem):
         # self.setAcceptHoverEvents(True)  # Enable hover events if needed
         self.setFlags(QGraphicsRectItem.ItemIsSelectable)
 
+    @property
+    def length(self):
+        dist = 0.0
+        for i in range(1, len(self.bodyaxis)):
+            si = self.bodyaxis[i-1]
+            ei = self.bodyaxis[i]
+            sk = self._keypoints[si, :]
+            ek = self._keypoints[ei, :]
+            dist += np.sqrt((ek[0] - sk[0])**2 + (ek[1] - sk[1])**2)
+        return dist
+
     # def mousePressEvent(self, event):
     #     self.signals.clicked.emit(self.data(0), QPointF(event.scenePos().x(), event.scenePos().y()))
 
@@ -82,7 +95,11 @@ class SkeletonWidget(QWidget):
     def updateInfo(self, index):
         if index > -1:
             s = self._skeletons[index]
-            self._info_label.setText(f"Detection id {s.data(DetectionData.ID.value)}, track {s.data(DetectionData.TRACK_ID.value)} on frame {s.data(DetectionData.FRAME.value)}")
+            l = s.length
+            i = s.data(DetectionData.ID.value)
+            t = s.data(DetectionData.TRACK_ID.value)
+            f = s.data(DetectionData.FRAME.value)
+            self._info_label.setText(f"Id {i}, track {t} on frame {f}, length {l:.1f} px")
         else:
             self._info_label.setText("")
 
@@ -119,6 +136,8 @@ class SkeletonWidget(QWidget):
 
     def addSkeleton(self, coords, detection_id, frame, track, brush, update=True):
         def check_extent(x, y, w, h):
+            if x == 0 and y == 0:
+                return
             if len(self._skeletons) == 0:
                 self._minx = x
                 self._maxx = x + w
@@ -186,14 +205,9 @@ def main():
         df = pickle.load(f)
 
     focus_brush = QBrush(QColor.fromString("red"))
-    second_brush = QBrush(QColor.fromString("blue"))
-
-    scnd_coords = np.stack(df.keypoints[(df.track == 2)].values,).astype(np.float32)[:,:,:]
-    scnd_tracks = df.track[df.track == 2].values
-    scnd_ids = df.track[(df.track == 2)].index.values
-
     focus_coords = np.stack(df.keypoints[df.track == 1].values,).astype(np.float32)[:,:,:]
     focus_tracks = df.track[df.track == 1].values
+    focus_frames = df.track[df.track == 1].values
     focus_ids = df.track[(df.track == 2)].index.values
 
     app = QApplication([])
@@ -209,7 +223,8 @@ def main():
     layout.addWidget(btn)
     # view.addSkeleton(focus_coords[10,:,:], focus_ids[10], focus_brush)
     count = 100
-    view.addSkeletons(focus_coords[:count,:,:], focus_ids[:count], focus_brush)
+    view.addSkeletons(focus_coords[:count,:,:], focus_ids[:count],
+                      focus_frames[:count], focus_tracks[:count], focus_brush)
     # view.addSkeletons(scnd_coords[:count,:,:], scnd_ids[:count], second_brush)
 
     # view.addSkeletons(focus_coords[:10,:,:], focus_ids[:10], focus_brush)