CODEWITHSUNDEEP
androidandroid-camera2
Bruce
Bruce

Reputation: 2584

How to achieve Google Duo app's low light mode using Camera2 API?

I'm working on an Android app that streams video with another party, and currently looking at brightening the image in low light scenes.

I noticed that on Google Duo app, the low light mode does it really well.

enter image description here

Is it achievable using just Camera2 API? The reason I am not using CameraX API is because my app is also utilising Vonage (formerly TokBox) SDK for two way video call and it's SDK sample code currently uses Camera2 API and haven't migrated to CameraX yet.

What I tried is to set CONTROL_AE_MODE (Auto Exposure) to CONTROL_AE_MODE_ON, this helps a bit but the image quality is no where as near as Google Duo app's. I'm looking to decrease the Camera FPS next but what else can I do to brighten the image?

Upvotes: 1

Views: 209

Answers (1)

maanslund
maanslund

Reputation: 164

If you set CaptureRequest.CONTROL_AE_MODE to CaptureRequest.CONTROL_AE_MODE_OFF then you can control ISO CaptureRequest.SENSOR_SENSITIVITYand exposure time CaptureRequest.SENSOR_EXPOSURE_TIME manually.

You can read the available range of sensorSensitivity (ISO) like this val sensorSensitivityRange = cameraCharacteristics?.get(CameraCharacteristics.SENSOR_INFO_SENSITIVITY_RANGE) as Range<Int>? as this will vary from device to device / camera to camera.

So in low-light mode you could control the brightness yourself, and in normal mode, you let the camera do it automatically.

More information here: https://developer.android.com/reference/android/hardware/camera2/CaptureRequest

Upvotes: 2

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