Help in accessing documentations for fast_depth model. What is HAILO_DEPTH_MASK?

General
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1

I have experimented with a pipeline to run the fast_depth.hef pretrained model from hailo model zoo. However, I have not been able to find much information on the return values after inputting into the model.

pipeline_str = (
            "libcamerasrc ! "
            "video/x-raw,format=NV12,width=1280,height=720,framerate=30/1 ! "
            "videoscale ! videoconvert ! "
            "video/x-raw,format=RGB,width=224,height=224 ! "
            f"hailonet hef-path={self.hef_path} ! "
            "videoconvert ! video/x-raw,format=NV12 ! "
            "appsink name=mysink"
        )

However, after the inference, I run this code:

roi = hailo.get_roi_from_buffer(buffer)
depth_tensors = roi.get_objects_typed(hailo.HAILO_DEPTH_MASK)

but depth_tensors seems to have nothing. I’m not sure what HAILO_DEPTH_MASK returns. Could anyone guide me to documentation which may help me with understanding the models on hailo model zoo, and how to implement a successful inference pipeline?