# One Camera + One Cross-Line Laser: From Laser-Profile 3D to Full-Image 3D
Hello everyone,
I would like to share an experimental 3D scanning project that may be of interest to people working with structured light and laser triangulation.
The current prototype is deliberately simple:
* One monocular camera
* One cross-line laser projector
After calibration, a single image is captured.
## The conventional limitation
In conventional laser triangulation, 3D coordinates are normally calculated only for pixels where the laser profile is visible. The laser line provides the additional geometric constraint needed for triangulation. Pixels outside the observed laser profile do not directly have that constraint, so they normally cannot be triangulated in the same way.
This is the traditional boundary that my experiment is trying to cross.
## The idea I am exploring
My method is not limited to the pixels on the laser profile. Using the calibrated geometry of the camera and the four reference directions provided by the cross-line laser, I establish a continuous geometric relationship over the image plane.
As a result, **pixels without any visible laser profile can also be assigned 3D coordinates**.
In principle, this allows a dense point cloud to be generated from a single captured image, rather than obtaining 3D only along the observed laser lines.
The current prototype has already produced dense point clouds, including image regions where no laser line is present.
Demo video:
https://youtu.be/MXLTeFUo8u8
The detailed algorithm is not being published at this stage. My purpose here is to introduce the idea and to find people who understand conventional laser/structured-light reconstruction and are interested in discussing or exploring this direction.
I would especially be interested in hearing from people with complementary experience in:
* 3D scanning and reconstruction
* Structured light or laser triangulation
* Camera calibration and geometric vision
* Optical design or DOE-based projection
If this approach looks interesting to you, I would be very happy to discuss it further and explore the possibility of collaboration.
Thank you.