This document discusses 3D stereo photogrammetry and camera calibration. It explains that camera calibration involves determining intrinsic parameters like focal length and image center, as well as extrinsic parameters involving camera location and orientation. The document also mentions that 3D reconstruction through photogrammetry involves triangulation using disparity and camera parameters to output 3D formats like OBJ, VRML and STL, but there are problems that can occur with occlusion, repeated patterns, foreground and background discontinuities, and system disturbances.

1. MohammedAlmuzian
3D Stereo Photogrammetry
Camera Calibration
1. Intrinsicparameters
- Focal length,image centre,image elementsizeandratio,cameralensdistortion
2. Extrinsicparameters:
- locationof cameralensand itsorientation
3D Reconstruction
 Triangulation
• Disparity
• Cameraparameters
 3D formats:OBJ,VRML and STL …
Problems
• Occlusion
• Repeatedpatterns
• ForegroundandBackgrounddiscontinuities
• Systemdisturbed