Calibrate Camera with one Photo (Linear Method)

Have you ever wondered how a photographer got a shot? Performs camera calibration from labelled points in 3D space and pixel coordinates

Have you ever wondered how a photographer got a shot? This code computes the camera's original position and orientation from a single photo -- all you need to do is measure the real-world coordinates of points seen in the photograph and then click on those points in the photo. The code also determines the camera's focal length, optical center, and the scaling of the pixels in x and y.

All you need is a photograph (imageFilename), and to update gather3Ddata.m with the coordinates of points in the 3D world visible in the photo.

Instruction video: https://youtu.be/WEYwitb6dTo

This uses the method in Robot Modeling and Control by Spong, Vidgasgar and

Hutchinson. This methods is also known as Tsai's calibration method

http://people.csail.mit.edu/bkph/articles/Tsai_Revisited.pdf

Tsai, Roger Y. (1986) "An Efficient and Accurate Camera Calibration Technique

for 3D Machine Vision", Proceedings of IEEE Conference on Computer Vision

and Pattern Recognition, Miami Beach, FL, 1986, pp. 364-374.

by Steban Soto, Cora Yuzhu, Aaron T. Becker in 2018, updated with mouse handler

by Shreyas Poyrekar in 2018.

This code requires an image in the working directory named 'imageFilename.jpg'

It also requires the function gather3Ddata.m and findOrthocenter.m