Perspective Projection of a 3D head to form a face image

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chaitanya
chaitanya am 17 Jan. 2013
Beantwortet: hagege ruben am 2 Dez. 2017
Input: 53490 3D points and for each point (xyz) and color (rgb) of a head
Output: 2D face image as viewed from a particular position / direction
Platform: Matlab
After study, I found the steps to be implemented
I implemented the above 3 steps in Matlab. But it takes 8 min for the execution. The 2D rendering is part of my project (3D Morphable Models); I will be calling the 2D rendering part 5000 times later. I want the execution time under 1sec.
The bulk (99.9%) of time is taking for z-buffering. The implementation is done following the wiki link.
Can anyone help me to reduce the time in Matlab or suggest other platform? Any tutorials/demo references to understand the above steps will be helpful.
Thanks in advance
  1 Kommentar
Yuhan Zhang
Yuhan Zhang am 24 Jun. 2016
I want to work on 3D face reconstruction, but I do not know how to do it. Can you send your code to me to study?

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Antworten (2)

Jinzheng Sha
Jinzheng Sha am 9 Apr. 2014
Hi, Chaitanya:
I have seen your question http://www.mathworks.com/matlabcentral/answers/59092-perspective-projection-of-a-3d-head-to-form-a-face-image. I am now working on a project which consists of fitting a 3D facial model to a 2D image. I also get stuck in the persective projection of the 3D model.
I do not understand why do you need z-buffering. Is that because your 3D data includes color? Can I do this task by just multipling the 3D data with a project matrix R?
Hope to hear from you!
Thank you!
  1 Kommentar
Yuhan Zhang
Yuhan Zhang am 24 Jun. 2016
I want to work on 3D face reconstruction, but I do not know how to do it. Can you send your code to me to study?

Melden Sie sich an, um zu kommentieren.


hagege ruben
hagege ruben am 2 Dez. 2017
why not simply use the plot3 (or another kind of 3d plot) function while assigning CData to the points and using view to get the point of view that you want? you can then use material and light and tweak some options to get a better rendering

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