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Exactly? Probably not. Unless they used OpenCV internally.

It should be pretty close though, as long as you're using the same camera info and have the same pixel locations.

The biggest variable is probably the matching method. If you aren't matching the pixels correctly, it won't look very similar.

A provided depth map is probably good for the big stuff. If you have a small number of known points, IE: markers, that you need range to, you might be better off doing triangulation because you can make exact matches.

You can also try the various methods and see which is more accurate, and which meets your needs.