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[iOS] video vs livestream model coordinates #5780

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mosolab opened this issue Dec 15, 2024 · 0 comments
Open

[iOS] video vs livestream model coordinates #5780

mosolab opened this issue Dec 15, 2024 · 0 comments
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@kuaashish
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platform:ios MediaPipe IOS issues task:hand landmarker Issues related to hand landmarker: Identify and track hands and fingers type:support General questions

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@mosolab
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mosolab commented Dec 15, 2024 •
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Hi team!

Have question about hand landmark detection model modes for iOS and outputs.
Now experimenting with two options to initialise HandLandmarker on iOS:

  • options.runningMode = .video
  • options.runningMode = .liveStream

Landmarks output seems to differ for these two modes.

Here [https://ai.google.dev/edge/mediapipe/solutions/vision/hand_landmarker] mentioned different types of output for decoded video frames and live video feed as:

  • Landmarks of detected hands in image coordinates
  • Landmarks of detected hands in world coordinates

What is difference and is there a way to convert them between each other?
@mosolab mosolab added the type:others issues not falling in bug, perfromance, support, build and install or feature label Dec 15, 2024
@kuaashish kuaashish added type:support General questions platform:ios MediaPipe IOS issues task:hand landmarker Issues related to hand landmarker: Identify and track hands and fingers and removed type:others issues not falling in bug, perfromance, support, build and install or feature labels Dec 16, 2024
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platform:ios MediaPipe IOS issues task:hand landmarker Issues related to hand landmarker: Identify and track hands and fingers type:support General questions
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