Main Content

intrinsicsEstimationErrors

Object for storing standard errors of estimated camera intrinsics and distortion coefficients

expand all in page

Description

The intrinsicsEstimationErrors object contains the standard errors of estimated camera intrinsics and distortion coefficients. You can access the intrinsics and distortion standard errors using the object properties. You can display the standard errors using the displayErrors object function.

Creation

Syntax

[params,imgsUsed,Errors] = estimateCameraParameters(imagePoints,worldPoints)

Description

[params,imgsUsed,Errors] = estimateCameraParameters(imagePoints,worldPoints) creates an intrinsicsEstimationErrors object by calling the estimateCameraParameters function with image points and world points. The function returns a stereoCalibrationErrors or cameraCalibrationErrors object as the third output argument, which contains the intrinsicsEstimationErrors as a read-only property.

Properties

expand all

This property is read-only.

Standard error of the camera axes skew estimate, specified as a scalar.

Standard error of the focal length estimate, specified as a scalar.

This property is read-only.

Standard error of the principal point estimate, specified as a scalar.

This property is read-only.

Standard error of the radial distortion estimate, specified as a scalar.

This property is read-only.

Standard error of the tangential distortion estimate, specified as a scalar.

Examples

collapse all

Open Live Script

Create a set of calibration images.

images = imageDatastore(fullfile(toolboxdir("vision"),"visiondata", ...
 "calibration","mono"));

Detect the calibration pattern.

[imagePoints,boardSize] = detectCheckerboardPoints(images.Files);

Generate the world coordinates of the corners of the squares. The units of the square are in millimeters.

squareSize = 29;
worldPoints = patternWorldPoints("checkerboard",boardSize,squareSize);

Calibrate the camera.

I = readimage(images,1); 
imageSize = [size(I,1) size(I,2)];
[params,~,errors] = estimateCameraParameters(imagePoints,worldPoints, ...
                                  ImageSize=imageSize);

Display the standard intrinsics errors.

displayErrors(errors.IntrinsicsErrors,params);
Focal length (pixels):   [  714.1884 +/- 3.3219      710.3783 +/- 4.0579  ]
Principal point (pixels):[  563.6478 +/- 5.3967      355.7255 +/- 3.3036  ]
Radial distortion:       [   -0.3536 +/- 0.0091        0.1730 +/- 0.0488  ]

Version History

Introduced in R2013b

See Also

Apps

Objects

Topics