Camera Calibration Toolbox for Matlab
 

Description of the functions in the calibration toolbox

The following table gives a short description of the main functions in the calibration toolbox, and their associated matlab script files (.m files) in standard and memory efficient modes.

For a more complete description of those functions (when to use them, input/output, ...) visit the first example page.

Button name
Matlab file name
(in standard mode)
Matlab file name
(in memory efficient mode)
Short description
calib_gui.m
Launchs the main mode selection window for the calibration toolbox
calib_gui_normal.m
calib_gui_no_read.m
Launchs the main camera calibration toolbox (in standard or memory efficient mode)
Image names
data_calib.m
data_calib_no_read.m
Lets the user input the calibration image file names
Read images
ima_read_calib.m
ima_read_calib_no_read.m
Reads in the images from files. In memory efficient mode, this function only checks the content of the current folder.
Extract grid corners
click_calib.m
click_calib_no_read.m
Extracts the grid corners from images
Calibration
go_calib_optim.m
go_calib_optim_no_read.m
Computes the final intrinsic and extrinsic calibration parameters by minimizing the reprojection error (through gradient descent)
Show Extrinsic
ext_calib.m
ext_calib.m
Plots the extrinsic parameters (3D positions of the grids with respect to the camera)
Reproject on images
reproject_calib.m
reproject_calib_no_read.m
Plots the reprojections of the calibration grids onto the images
Analyse error
analyse_error.m
analyse_error.m
Error inspection tool (to identify points with large errors)
Recomp.corners
recomp_corner_calib.m
recomp_corner_calib_no_read.m
Recomputes the image corners for a specific image, or all images
Add/Suppress images
add_suppress.m
add_suppress.m
Tool that allows to activate and de-activate images
Save
saving_calib.m
saving_calib.m
Saves the calibration results (intrinsic and extrinsic) under the matlab file Calib_Results.mat
Load
loading_calib.m
loading_calib.m
Loads the calibration results from the matlab file Calib_Results.mat
Exit

Closes the calibration tool window (run calib_gui, calib_gui_normal or calib_gui_no_read to re-start the tool)
Comp. Extrinsic
extrinsic_computation.m
extrinsic_computation.m
Computes the extrinsic parameters for an image assuming known intrinsic parameters
Undistort image
undistort_image.m
undistort_image_no_read.m
Undistorts an image assuming known intrinsic parameters
Export calib data
export_calib_data.m
export_calib_data.m
Exports the calibration data (image points + world coordinates) into formats compatible with Willson-Heikkilä's and Zhang's calibration programs
Show calib results
show_calib_results.m
show_calib_results.m
Shows the current calibration parameters (focal, principal point, skew, distortion coefficients) and their uncertainties


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