IPhone camera issue (or Apple's camera calibration algorithm)

Hello?

I'm developing an app that observes something with an iPhone camera.


Set the camera manually. I want to take the video and extract the RGB values at a certain point.

The things the iPhone camera observes change color over time.

It first changes rapidly and then gradually changes color (within 15 seconds). It turns red or blue.


I first developed this on Android. It works well (regardless of model). I am using the iPhone 8, but I see a strange phenomenon.

On iPhone, sudden bouncing (ascending) phenomenon is observed.


img1:http://i64.tinypic.com/10xh5p2.png

img2:http://i68.tinypic.com/wb5nv8.png


My conclusion is that the iPhone ISP has a calibration.

This is because I have locked or turned off all the features (ISO, Exposure, Focus, AWB, HDR, OIS) provided by the SDK.

Do you have additional features besides those listed? Or is it unique to Apple ISPs that I can not control?


What do you think? Do you have the same experience as me?