fong5855 / cv_practice

Practice for 3D object projection

Try to project a 3D object to difference views.
You can use any method to impliment this practice.

Description

3D objects are usually stored as "point cloud", which sample lots of dots along the surface of real world object and represent them as (x,y,z) in camera coordinate.(wiki)

The 3D object processing often lead to large amount of computation. To make this more efficiency and easy to display, we usually project them to 2D. Here is an example

File explain:

The 3D object is store as XXX.abs file.(due to license, I cannot put here)

The abs folder is a decoder for abs format.
The CMake can generate a dynamic link libaray (dll) for other language or other platform.

The python folder is a demo for use dll library.

GOAL

1. Display Original point cloud in 3D space (Need a good cpu or gpu, if your device cannot display you can skip it)

2. Project to 2D image (depth map)

3. Try rotating the object (in any direction, you can also move the camera and the projection plane) and project it to a 2D depth map. The output depth map should contain rotation information (eg, £cx, £cy, £cz).