Update readme.md

TRAILab · Aug 21, 2023 · 4469eac · 4469eac
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diff --git a/human_detection/yolov7_skeleton/readme.md b/human_detection/yolov7_skeleton/readme.md
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 Usage:
 1. download the model and test video here: https://utoronto-my.sharepoint.com/:f:/r/personal/nathan_hung_mail_utoronto_ca/Documents/yolov7?csf=1&web=1&e=pSSspq
-2. run ```
+2. run `sudo apt-get install ros-humble-vision-msgs`
+3. run ```
 python yolov7.py --weights-file yolov7.pt --nosave  --view-img --show-fps --show-track-lines --classes 0 --no-trace --source video.mp4
 ``` to run inference on __video.mp4__
 
 to run inference on webcam, use ```
 python yolov7.py --weights-file yolov7.pt --nosave  --view-img --show-fps --show-track-lines --classes 0 --no-trace --source webcam
 ```
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