undistortImage function gives out all black image

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Mohamad Safhire
Mohamad Safhire 2017-3-9
回答： Vinoth Venkatesan 2020-10-26
This is my first time using the undistortImage function of the computer vision system toolbox in matlab but somehow every image that i try to use with the undistortImage function gives a blank image everytime. I used the camera calibration app to get my camera parameters. Can someone tell me what am i doing wrong?
originalImage = imread(imageFileNames{20});
undistortedImage = undistortImage(originalImage, cameraParams);
figure; imshow(undistortedImage)
here is the camera parameters
here is the originalImage square size are 100mmx100mm
here is the output image

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回答（1 个）

Vinoth Venkatesan
Vinoth Venkatesan 2020-10-26
This looks like it could be an issue with the calibration. Try to use a checkerbord with more squares and have the checkerboard cover as much of the field-of-view as possible.
Another thing to try is to set the 'OutputView' name-value argument in 'undistortImage' to 'full'.
undistortImage(I,cameraParams,'OutputView','full');
Refer here for some tips for preparing the checkerboard and capturing calibration images.

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