exposure control

[Kumar Ranjan Kamila]

We have a face capture app , in which we have circular area where user should keep their face . How to control exposure in the certain circular area only after user's face is detected , in camerax ?

Any help would be appreciated !

Thanks

[Wenhung Teng]

CameraX has an API to focus at certain areas which would be auto exposure. 

You can reference https://proandroiddev.com/android-camerax-tap-to-focus-pinch-to-zoom-zoom-slider-eb88f3aa6fc6 to change the focus point.

Combined with the mlkit face detection https://github.com/googlesamples/mlkit/tree/master/android/vision-quickstart, it would be able to trigger the focus after the face was detected.

kumar.ran...@gmail.com 在 2023年5月9日 星期二下午3:03:04 [UTC+8] 的信中寫道：