I have a lengthy hexadecimal string data,The data contents are RGB which can stand for X Y Z.Now How can I extracted the 3D model from the RGB color space?OpenCV helps? Or some other library.Now I can come up with a idea.First find the min cube of the colors.Then use scan line to find out the useful points.Then combine the points to surface. Is there a more mature program?
Your data is a cloud of 3D points (COP). The Point Cloud Library - PCL: pointclouds.org offer various tools for processing such data.