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What's the different between initWideAngleProjMap and initUndistortRectifyMap

Hi Experts:

I found initWideAngleProjMap in OpenCV source code, but I can't any documents on it.

Is this function predicted? Can I use this function with the newest version of OpenCV? Currently, I'm doing a projec involved fish eye camera calibration. I used initUndistortRectifyMap function. It works not bad.

And i want to know is initWideAngleProjMap more suit for fish eye camera?

What's the different between initWideAngleProjMap and initUndistortRectifyMap

Hi Experts:

I found initWideAngleProjMap in OpenCV source code, but I can't any documents on it.

Is this function predicted? Can I use this function with the newest version of OpenCV? Currently, I'm doing a projec project involved fish eye camera calibration. I used initUndistortRectifyMap function. It works not bad.

And i want to know is initWideAngleProjMap more suit for fish eye camera?