How to enable the Pixel Visual Core’s HDR+ feature.
Go to the Settings menu.
Scroll down and select System.
Tap on Developer options.
Make sure the Developer options is toggled on and scroll down until you find the Debugging subheading.
At the bottom of this section, locate Camera HAL HDR+ and toggle it on.
A pop-up will appear letting you know that you must now restart your smartphone before the Pixel Visual Core can begin working.
With the Camera HAL HDR+ option turned on when you take a picture, the custom chip will start handling the HDR+ image processing.