CODEWITHSUNDEEP
android
gaurav
gaurav

Reputation: 235

Setting exposure property of webcam in rooted android mobile

I have been looking to set autoexposure off in the webcam attached to my rooted Android mobile. I have tried to solve this problem using the OpenCv library for Linux and using v4l2. But I have got no success with it.

while using v4l2, it says that it's not a v4l2 device; i.e,it gives an EINVAL error.
But this webcam is running well on other platforms...

Can anyone help me to get this problem solved?

Upvotes: 1

Views: 516

Answers (1)

gaurav
gaurav

Reputation: 235

This does not require rooting...

After spending around 5 days on it,I found that my webcam supported UVC.All functionalities of webcam can be implemented using UVC library "libuvc".It is an open-source project.You can get the source code here. Auto-exposure property of webcam can be set using following two functions defined in library::

uvc_set_ae_mode(uvc_device_handle_t *devh, uint8_t mode); uvc_set_exposure_abs(uvc_device_handle_t *devh, uint32_t time);

First method is used to set auto-exposure off/on(Setting mode=1 makes auto-exposure off).The latter method is used to set absolute exposure value.

You can get whole list of functions and their usage here

Upvotes: 2

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