The patent expired on March 8 , describing the technique (Scale Invariant Feature Transform), intended for feature detection in images. SIFT is applicable in fields such as object recognition in images, overlaying 3D models onto real images in augmented reality systems, map matching, determining location in 3D space, and stitching panoramas. Previously, using SIFT in commercial projects required obtaining a license or permission, but now it has become available to everyone.
Implementation of SIFT in OpenCV, but categorized under the "«, separate inclusion. The expiration of the patent will allow SIFT to be included in the main OpenCV set and be used without restrictions for image recognition in open projects.
Source: opennet.ru
