Update inference.py

inference.py

@@ -464,7 +464,9 @@ def non_max_suppression(
         prediction = prediction.cpu()
     bs = prediction.shape[0]  # batch size
     xc = prediction[..., 4] > conf_thres  # candidates
-    pix2width = image_meter_width/width
+
+    # width filter
+    pix2width = image_meter_width/image_pixel_width
     width = prediction[..., 2]*pix2width
     wc = width < max_length