Funded by:
RGC Competitive Earmarked Research Grant (CERG), Hong Kong [Project 9040540]; and
Strategic Research Grant, CityU [Project 7001431].
Contents:
Examples of Object Reconstruction
For efficient reconstruction of entire object/environment: "next viewpoint decision"
Download the software and data examples
Introduction of the Structured Light System
The system contains a color CCD camera and a DLP projector. For more details, please read my published papers of this issue.
About 7 light encoding methods are implemented in the 3-D measurement system. Typical encoding methods are "Gray-Coded Light Approach" and "Uniquely Encoded Light Patterns", as shown in following figures.
For more details, please read my published papers of this issue.
Examples of Object Reconstruction
Example one
The first example is to show 3D reconstruction of a head model.
The object (head model) to to reconstructed
| Description | Current View | Merged All Previous View | |
| Step 1 | Obtain the first view
- Top view of the head |
|
(no previous knowledge about the object) |
| Step 2 | Obtain the second view - The left side the head.
And merge the two views (all known knowledge).
|
 |
|
| Step 3 | Obtain the third view - The front side the head.
And merge the three views. |
 |
|
| Step 4 | Obtain the forth view - The back side the head.
And merge the four views.
|
 |
|
| Step 5 | Obtain the final view - The right side the head.
And merge all the five views to bring an entire model of the head. |
 |
|
Example two
Here is another example to show 3D reconstruction of a cup within 4 steps.
The object (a cup) to to reconstructed
| Description | Current View | Merged All Previous View | |
| Step 1 | Obtain the first view
- Top view |
|
(no previous knowledge about the object) |
| Step 2 | Obtain the second view - one side of the cup.
And merge the two views (all known knowledge).
|
 |
|
| Step 3 | Obtain the third view - Another side of the cup.
And merge the three views. |
 |
|
| Step 4 | Obtain the final view - A side of the cup.
And merge all the four views to bring an entire model of the cup. |
 |
|
The next viewpoint decision is based on a method called "trend surface".
For more details, please read my published papers of this issue.
Software: The 3D measurement system, Active3D.zip.
Note: The
current version only support frame-grabber produced by Imaging Technology. Only
with such a card, you can perform 3D measurement.
Software: The 3D viewer (with animation), view3d.zip.
Note: It
was developed by OpenGL. If there are problems of launching the program, see here
to fix the necessary supports.
Software: The projector controller (pattern generator), dlp.zip.
Note: To generate many light patterns and output to
the DLP/LCD projector. It also runs as a server to receive the pattern-commands from the 3D measurement system.
3D data set: Example data of the head.
Note: The
*.xyz files can only be readable by the two programs here. To get other formats
of the data, please contact the author directly.
For more information about this research, contact ShengYong Chen. Email: msg@sychen.com
Chen, ShengYong, Stephen, 2003. All rights reserved.
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