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Add speed_estimation and distance_calculation in ultralytics solutions (#7325)

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Co-authored-by: Glenn Jocher <glenn.jocher@ultralytics.com>
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Muhammad Rizwan Munawar 2024-01-05 14:38:13 +05:00 • committed by GitHub
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---
comments: true
description: Distance Calculation Using Ultralytics YOLOv8
keywords: Ultralytics, YOLOv8, Object Detection, Distance Calculation, Object Tracking, Notebook, IPython Kernel, CLI, Python SDK
---
# Distance Calculation using Ultralytics YOLOv8 🚀
## What is Distance Calculation?
Measuring the gap between two objects is known as distance calculation within a specified space. In the case of [Ultralytics YOLOv8](https://github.com/ultralytics/ultralytics), the bounding box centroid is employed to calculate the distance for bounding boxes highlighted by the user.
## Advantages of Distance Calculation?
- **Localization Precision:** Enhances accurate spatial positioning in computer vision tasks.
- **Size Estimation:** Allows estimation of physical sizes for better contextual understanding.
- **Scene Understanding:** Contributes to a 3D understanding of the environment for improved decision-making.
???+ tip "Distance Calculation"
- Click on any two bounding boxes with Left Mouse click for distance calculation
!!! Example "Distance Calculation using YOLOv8 Example"
=== "Video Stream"
```python
from ultralytics import YOLO
from ultralytics.solutions import distance_calculation
import cv2
model = YOLO("yolov8n.pt")
names = model.model.names
cap = cv2.VideoCapture("path/to/video/file.mp4")
assert cap.isOpened(), "Error reading video file"
# Video writer
video_writer = cv2.VideoWriter("distance_calculation.avi",
cv2.VideoWriter_fourcc(*'mp4v'),
int(cap.get(5)),
(int(cap.get(3)), int(cap.get(4))))
# Init distance-calculation obj
dist_obj = distance_calculation.DistanceCalculation()
dist_obj.set_args(names=names, view_img=True)
while cap.isOpened():
success, im0 = cap.read()
if not success:
print("Video frame is empty or video processing has been successfully completed.")
break
tracks = model.track(im0, persist=True, show=False)
im0 = dist_obj.start_process(im0, tracks)
video_writer.write(im0)
cap.release()
video_writer.release()
cv2.destroyAllWindows()
```
???+ tip "Note"
- Mouse Right Click will delete all drawn points
- Mouse Left Click can be used to draw points
### Optional Arguments `set_args`
| Name | Type | Default | Description |
|----------------|--------|-----------------|--------------------------------------------------------|
| names | `dict` | `None` | Classes names |
| view_img | `bool` | `False` | Display frames with counts |
| line_thickness | `int` | `2` | Increase bounding boxes thickness |
| line_color | `RGB` | `(255, 255, 0)` | Line Color for centroids mapping on two bounding boxes |
| centroid_color | `RGB` | `(255, 0, 255)` | Centroid color for each bounding box |
### Arguments `model.track`
| Name | Type | Default | Description |
|-----------|---------|----------------|-------------------------------------------------------------|
| `source` | `im0` | `None` | source directory for images or videos |
| `persist` | `bool` | `False` | persisting tracks between frames |
| `tracker` | `str` | `botsort.yaml` | Tracking method 'bytetrack' or 'botsort' |
| `conf` | `float` | `0.3` | Confidence Threshold |
| `iou` | `float` | `0.5` | IOU Threshold |
| `classes` | `list` | `None` | filter results by class, i.e. classes=0, or classes=[0,2,3] |
| `verbose` | `bool` | `True` | Display the object tracking results |