Deep Sort with Spatial Mono

So it seems to be working!

But now I am having trouble wrapping my head around how to print out the data now. I would like it to be in the format of something like:

Tracking ID: X-depth value, Y-depth value, Z-depth value

But I am having trouble wrapping my head around how to do this in the callback function. The original code in the SDK example is the following:

def cb(packet: TwoStagePacket):
    detections = packet.img_detections.detections
    vis = packet.visualizer
    # Update the tracker
    object_tracks = tracker.iter(detections, packet.nnData, (640, 640))

    for track in object_tracks:
        if not track.is_confirmed() or \
            track.time_since_update > 1 or \
            track.detection_id >= len(detections) or \
            track.detection_id < 0:
            continue

        det = packet.detections[track.detection_id]
        vis.add_text(f'ID: {track.track_id}', bbox=(*det.top_left, *det.bottom_right), position=TextPosition.MID)

    frame = vis.draw(packet.frame)
    cv2.imshow('DeepSort tracker', frame)

I was thinking that I should be able to print the spatial data by having something like this in the for loop:

print(packet.spatials.detections[track.detection_id].x) 

but I am getting the error:

File "C:...\OakD\depthai-experiments\gen2-deepsort-tracking\jae_deepsort_spatial_mono.py", line 26, in cb
    print(packet.spatials.detections[track.detection_id].x)
          ^^^^^^^^^^^^^^^
AttributeError: 'TwoStagePacket' object has no attribute 'spatials'

I am sort of at a loss here again....

jakaskerl Hi jaka, I am getting errors with labels and spatials:

  File "C:....\depthai-experiments\gen2-deepsort-tracking\jae_deepsort_spatial_mono.py", line 24, in cb
    print(f'ID: {track.track_id}, Class: {det.label}, BBox: {det.top_left}, {det.bottom_right}, Spatials: {spatials.x}, {spatials.y}, {spatials.z}')
                                          ^^^^^^^^^
AttributeError: 'Detection' object has no attribute 'label'
Sentry is attempting to send 2 pending error messages

Tried running without label and got the following error for spatials:

File "C:\...OakD\depthai-experiments\gen2-deepsort-tracking\jae_deepsort_spatial_mono.py", line 24, in cb
    print(f'ID: {track.track_id}, BBox: {det.top_left}, {det.bottom_right}, Spatials: {spatials.x}, {spatials.y}, {spatials.z}')
                                                                                       ^^^^^^^^
NameError: name 'spatials' is not defined
Sentry is attempting to send 2 pending error messages

I also tried det.spatials.x and detections.spatials.x but not working...

jakaskerl Actually the spatials x y z are working. Class: {det.label} is not. Here it is!

import cv2
from depthai_sdk import OakCamera
import depthai as dai
from depthai_sdk.classes.packets import TwoStagePacket
from depthai_sdk.visualize.configs import TextPosition
from deep_sort_realtime.deepsort_tracker import DeepSort

tracker = DeepSort(max_age=1000, nn_budget=None, embedder=None, nms_max_overlap=1.0, max_cosine_distance=0.2)

def cb(packet: TwoStagePacket):
    detections = packet.img_detections.detections
    vis = packet.visualizer
    # Update the tracker
    object_tracks = tracker.iter(detections, packet.nnData, (640, 640))

    for track in object_tracks:
        if not track.is_confirmed() or \
            track.time_since_update > 1 or \
            track.detection_id >= len(detections) or \
            track.detection_id < 0:
            continue

        det = packet.detections[track.detection_id]
        spatials = detections[track.detection_id].spatialCoordinates
        print(
            f'ID: {track.track_id}, Class: {det.label}, BBox: {det.top_left}, {det.bottom_right}, Spatials: {spatials.x}, {spatials.y}, {spatials.z}')

        vis.add_text(f'ID: {track.track_id}', bbox=(*det.top_left, *det.bottom_right), position=TextPosition.MID)


    frame = vis.draw(packet.frame)
    cv2.imshow('DeepSort tracker', frame)


with OakCamera() as oak:
    left = oak.create_camera("left")
    right = oak.create_camera("right")

    stereo = oak.create_stereo(left=left, right=right, fps=15)
    yolo = oak.create_nn('yolov6nr3_coco_640x352', left, spatial=stereo)
    embedder = oak.create_nn('mobilenetv2_imagenet_embedder_224x224', input=yolo)
    embedder.image_manip.setFrameType(dai.RawImgFrame.Type.BGR888p)


    embedder.config_spatial(
        bb_scale_factor=0.5, # Scaling bounding box before averaging the depth in that ROI
        lower_threshold=300, # Discard depth points below 30cm
        upper_threshold=10000, # Discard depth pints above 10m
        # Average depth points before calculating X and Y spatial coordinates:
        calc_algo=dai.SpatialLocationCalculatorAlgorithm.AVERAGE
    )

    oak.visualize(embedder, fps=True, callback = cb)
    # oak.show_graph()
    oak.start(blocking=True)