Fix notebooks to visualize normalized detections

In a previous commit, the detections tensor was
changed to use normalized coordinates [0, 1]. This
fixes the notebooks to visualize the updated
detections format correctly.

inspect_model.ipynb

@@ -800,7 +800,7 @@
     "            for c, s in zip(detections[:, 4], detections[:, 5])]\n",
     "visualize.draw_boxes(\n",
     "    image, \n",
-    "    refined_boxes=detections[:, :4],\n",
+    "    refined_boxes=utils.denorm_boxes(detections[:, :4], image.shape[:2]),\n",
     "    visibilities=[2] * len(detections),\n",
     "    captions=captions, title=\"Detections\",\n",
     "    ax=get_ax())"
@@ -1163,7 +1163,7 @@
    ],
    "source": [
     "# Masks\n",
-    "det_boxes = mrcnn[\"detections\"][0, :, :4].astype(np.int32)\n",
+    "det_boxes = utils.denorm_boxes(mrcnn[\"detections\"][0, :, :4], image.shape[:2])\n",
     "det_mask_specific = np.array([mrcnn[\"masks\"][0, i, :, :, c] \n",
     "                              for i, c in enumerate(det_class_ids)])\n",
     "det_masks = np.array([utils.unmold_mask(m, det_boxes[i], image.shape)\n",

samples/balloon/inspect_balloon_model.ipynb

@@ -696,7 +696,7 @@
     "            for c, s in zip(detections[:, 4], detections[:, 5])]\n",
     "visualize.draw_boxes(\n",
     "    image, \n",
-    "    refined_boxes=detections[:, :4],\n",
+    "    refined_boxes=utils.denorm_boxes(detections[:, :4], image.shape[:2]),\n",
     "    visibilities=[2] * len(detections),\n",
     "    captions=captions, title=\"Detections\",\n",
     "    ax=get_ax())"
@@ -1051,7 +1051,7 @@
    ],
    "source": [
     "# Masks\n",
-    "det_boxes = mrcnn[\"detections\"][0, :, :4].astype(np.int32)\n",
+    "det_boxes = utils.denorm_boxes(mrcnn[\"detections\"][0, :, :4], image.shape[:2])\n",
     "det_mask_specific = np.array([mrcnn[\"masks\"][0, i, :, :, c] \n",
     "                              for i, c in enumerate(det_class_ids)])\n",
     "det_masks = np.array([utils.unmold_mask(m, det_boxes[i], image.shape)\n",