A lot of Background work is on progress in XDA community towards the Google Camera Modification by two of senior member's are cstark27 and Arnova8G2. it was started from launching of Google's latest new flagship devices Pixel 3 and 3xl with great camera built in great feature's like real-time Google Lens suggestions, motion tracking autofocus, Photobooth, Night Sight, and Super Res Zoom.
First time we saw cstark27 a senior member of XDA community introduces Night Sight a Best feature of Google Pixel 3 but hasn't official available for these device's, but cstark27 make available a raw feature for all pixel, xl, Pixel 2, 2xl and Pixel 3, 3xl earlier this week, Now he is released the new updated port of modded google camera application adds Photobooth, motion tracking autofocus, and real-time Google Lens Suggestions to the Google Pixel 2 and Google Pixel 2 XL. Photobooth recognizes smile faces of group of people or person and will automatically capture a photo when detects, Motion tracking autofocus will track tapped object on camera keeped focus on it, if the object or phone moves focusing still remain continuously autofocus.
With this Google Camera port, Google Pixel 2 users also have access to HDR+ Enhanced, which cstark27 says improves color in extreme low-light conditions. He also managed to get the new automatic FPS switcher feature ported. This lets the phone decide whether to record video 1080p at 30fps or 60fps, even switching between them mid-video. The other few features that have been ported include the HEVC/h.265 toggle and possibly Super Res Zoom, though the developer isn’t sure that the latter feature actually works. Portrait mode for the original Google Pixel and Google Pixel XL only works on human faces, though. That’s because the devices don’t have the required dual pixel camera sensor. There’s also an option for different versions of HDR and HDR+ for all three generations of Google Pixel devices.
You can install this updated Google Camera port by side-loading the APK linked below. If you have any issues, report them with logs to the forum thread.