I have a 3D mesh(OBJ files). And I captured it using Maya.
Then my problem is to find the correspondence between 2D pixels and 3D vertex.
Like V = (x,y,z)
so what is its 2D position (x',y') in the image?
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You must know the parameters of the projection plane and projection type (parallel or perspective). In the trivial case of parallel projection and when the projection plane is perpendicular to the Z axis x'=x, y'=y