This script will collect images of this pattern and compare the dimensions of the This script has been tested on a GoPro Hero 2 and GoPro Hero 3 black.Ĭalibrating a camera system relies on collecting images of a calibration pattern of known dimensions. While this projectįocuses on calibrating GoPro cameras, any camera can be calibrated with some minor adjustments to the code. There are several on-line resources for camera calibration including a great Matlab toolbox and a Python/OpenCV tutorial, which this program is based on. If we want to take any quantitative measurementsįrom the image we must first remove the distortion so that the image exemplifies the real-world. Related math you can check out these books: Multiple View Geometry inĭue to the distortion imparted on the image, the geometry, shape and scale of objects in the image are modified compared to the real-world. For more a in-depth explanation of the camera geometry and There is a second form of distortion called translationalĭistortion which derives from the fact that the lens is typically not perfectly centered above and parallel to the imaging sensor. The fisheye lens used in GoPro cameras causes increased distortion as you move away from the center of the image. This is mostly due to the shape of the lens and is typically called radialĭistortion. Which are supposed to be straight (red lines), like the door frame and cabinets are curved in the image. The image on the right was taken from a GoPro Hero 3. Every camera, with the exception of high end models, imparts some form of distortion on an image.

Matlab camera calibration checkerboard