Updating Pose_engine.py: heatmap parsing failure

Latest bodypix.py demo breaks to run due to indexing issues while parsing heatmaps in pose_engine.py.Adding changes to indexes in _parse_heatmap from outputs

pose_engine.py

@@ -158,13 +158,13 @@ def __init__(self, model_path, mirror=False):
         def calcStride(h,w,L):
           return int((2*h*w)/(math.sqrt(h**2 + 4*h*L*w - 2*h*w + w**2) - h - w))
 
-        details = self._interpreter.get_output_details()[4]
+        details = self._interpreter.get_output_details()[5]
         self.heatmap_zero_point = details['quantization_parameters']['zero_points'][0]
         self.heatmap_scale = details['quantization_parameters']['scales'][0]
         heatmap_size = self._interpreter.tensor(details['index'])().nbytes
         self.stride = calcStride(self.image_height, self.image_width, heatmap_size)
         self.heatmap_size = (self.image_width // self.stride + 1, self.image_height // self.stride + 1)
-        details = self._interpreter.get_output_details()[5]
+        details = self._interpreter.get_output_details()[6]
         self.parts_zero_point = details['quantization_parameters']['zero_points'][0]
         self.parts_scale = details['quantization_parameters']['scales'][0]
 
@@ -235,9 +235,9 @@ def softmax(self, y, axis):
 
     def _parse_heatmaps(self, outputs):
         # Heatmaps are really float32.
-        heatmap = (outputs[4].astype(np.float32) - self.heatmap_zero_point) * self.heatmap_scale
+        heatmap = (outputs[5].astype(np.float32) - self.heatmap_zero_point) * self.heatmap_scale
         heatmap = np.reshape(heatmap, [self.heatmap_size[1], self.heatmap_size[0]])
-        part_heatmap = (outputs[5].astype(np.float32) - self.parts_zero_point) * self.parts_scale
+        part_heatmap = (outputs[6].astype(np.float32) - self.parts_zero_point) * self.parts_scale
         part_heatmap = np.reshape(part_heatmap, [self.heatmap_size[1], self.heatmap_size[0], -1])
         part_heatmap = self.softmax(part_heatmap, axis=2)
         return heatmap, part_heatmap