when and where is the function processImage of ViewController.mm called?

[PapaMadeleine2022]

Hello, I am a novice and do not know when and where the function processImage of ViewController.mm is called.
Can you give some advises ? Thanks.

[PapaMadeleine2022]

need help..

[m3nsr3a]

@IvyGongoogle
It's a callback from OpenCV camera module.
Basically, as soon, as you declare a camera delegate

self.videoCamera.delegate = self;

and start capturing

[videoCamera start];

instead of default AV output style, you are going to receive images in OpenCV format(i.e. cv::Mat with 4 Chanels(BGRA)).

However one detail here, is that in current work it appears a patched version of OpenCV seems to be used.

float lowPart = image.at<float>(0,0);
float highPart = image.at<float>(0,1);

Original function, doesn't store timestamps on the borders of images(and all code further seems to take that in account).