Add num classes for SSD models

Author: GeekAlexis

fastmot/detector.py

@@ -86,7 +86,7 @@ def __init__(self, size,
         self.max_area = max_area
 
         class_ids = [] if class_ids is None else list(class_ids)
-        self.label_mask = np.zeros(len(models.LABEL_MAP), dtype=np.bool_)
+        self.label_mask = np.zeros(self.model.NUM_CLASSES, dtype=np.bool_)
         self.label_mask[class_ids] = True
 
         self.batch_size = int(np.prod(self.tiling_grid))

fastmot/models/ssd.py

@@ -12,6 +12,7 @@ class SSD:
     PLUGIN_PATH = None
     ENGINE_PATH = None
     MODEL_PATH = None
+    NUM_CLASSES = None
     INPUT_SHAPE = None
     OUTPUT_NAME = None
 
@@ -70,6 +71,7 @@ def build_engine(cls, trt_logger, batch_size, calib_dataset=Path.home() / 'VOCde
 class SSDMobileNetV1(SSD):
     ENGINE_PATH = Path(__file__).parent / 'ssd_mobilenet_v1_coco.trt'
     MODEL_PATH = Path(__file__).parent / 'ssd_mobilenet_v1_coco.pb'
+    NUM_CLASSES = 90
     INPUT_SHAPE = (3, 300, 300)
     OUTPUT_NAME = 'NMS'
     NMS_THRESH = 0.5
@@ -167,6 +169,7 @@ def add_plugin(cls, graph):
 class SSDMobileNetV2(SSD):
     ENGINE_PATH = Path(__file__).parent / 'ssd_mobilenet_v2_coco.trt'
     MODEL_PATH = Path(__file__).parent / 'ssd_mobilenet_v2_coco.pb'
+    NUM_CLASSES = 90
     INPUT_SHAPE = (3, 300, 300)
     OUTPUT_NAME = 'NMS'
     NMS_THRESH = 0.5
@@ -263,6 +266,7 @@ def add_plugin(cls, graph):
 class SSDInceptionV2(SSD):
     ENGINE_PATH = Path(__file__).parent / 'ssd_inception_v2_coco.trt'
     MODEL_PATH = Path(__file__).parent / 'ssd_inception_v2_coco.pb'
+    NUM_CLASSES = 90
     INPUT_SHAPE = (3, 300, 300)
     OUTPUT_NAME = 'NMS'
     NMS_THRESH = 0.5