Face Landmarker has shorter detection range on iOS compared to Web

[rcanbaba]

Have I written custom code (as opposed to using a stock example script provided in MediaPipe)?
None

OS Platform and Distribution
iOS 18, Xcode 16.1, macOS Sequoia

MediaPipe Version
MediaPipeTasksVision 0.10.21

Task Name
Face Landmark Detection

Describe the issue
We have observed a significant difference in face detection range between iOS and Web implementations of MediaPipe Face Landmark Detection.

On iOS, face detection fails beyond ~1.5 meters from the camera.
On the Web implementation, detection works beyond 3 meters, even though both platforms use the same face_landmarker.task model.
This behavior suggests that iOS has a shorter detection range.

Expected Behavior
Face detection should work at similar distances on both Web and iOS platforms, assuming the same model and similar camera conditions.

Is there a resolution scaling issue affecting iOS?
Does iOS process input frames differently before passing them to the model?
Is there any known parameter/configuration to extend the detection range?

[atilagulers]

i have same problem, detection range shorter in ios according to web.