swarm-lab/Rvision: Rvision 0.8.0

Full Changelog: https://github.com/swarm-lab/Rvision/compare/v0.7.0...v0.8.0

New features

• Add camera calibration functions and tutorial.
• Add mask to ECC and minMaxLoc functions.
• Add line detection with probabilistic Hough transform.
• Add goodFeaturesToTrack function (finds the most prominent corners in an image).
• Add pyramid resampling functions (up- and down-).
• Add ORB keypoint detection and matching.
• Add approxPolyDP (Douglas-Peucker algorithm for approximates a polygon with another polygon with less vertices).
• Add affine transform matrix computation.
• Add string argument for streams (users can now pass the URL of a video stream or a GStreamer pipeline string).

• Add invertFourcc function to recover a codec's name from its fourcc code.

• Add function to perform 90-degree rotations of images.
• Add undistort function for individual coordinates.

Minor improvements and fixes

• The documentation has been fixed/improved in several places.
• Many bug fixes here and there.
• Update capture and writer properties utilities.