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2 Commits (ac9a858377a51512d9ebf12d89153b024abb7c73)
| Author | SHA1 | Message | Date |
|---|---|---|---|
Alexander Duda
|
a41cbbdc99 |
findChessboardCornersSB: performance + support for full FOV boards with markers
Changes: * UMat for blur + rotate resulting in a speedup of around 2X on an i7 * support for boards larger than specified allowing to cover full FOV * support for markers moving the origin into the center of the board * increase detection accuracy The main change is for supporting boards that are larger than the FOV of the camera and have their origin in the board center. This allows building OEM calibration targets similar to the one from intel real sense utilizing corner points as close as possible to the image border. |
5 years ago |
|
Alexander Duda
|
a024593fa6 |
Merge pull request #12147 from D-Alex:master
* add new chessboard detector The chessboar detector is based on the paper. Accurate Detection and Localization of Checkerboard Corners for Calibration Alexander Duda, Udo Frese British Machine Vision Conference, o.A., 2018. It utilizes point symmetry of checkerboard corners in combination with a localized Radon transform approximated by box filters to achieve high performance even on large images. Here, tests have shown that the ability to localize checkerboard corners is close to the theoretical limit of 1/100 of a pixel while being considerably less sensitive to image noise than standard methods. * chessboard: add reference to bibtex file * chessboard: add dependency to opencv_flann * fix: test chesscorners. It is valid to return an empty list In case no chessboard was detected it should be valid for the detector to return an empty list. For simplifcation, it should be allowed to return any number of corners if they are flagged as not found. * fix: opencv.bib remove empty lines * fix: doc findChessboardCorners replace cvSize with cv::Size * chessboard tests: factor out logic selecting detector * chessboard: add unit test for findChessboardCorners2 This is includes a new chessboard generator which supports subpix corners with high accuracy by wrapping an optimal chessboard using wrapPerspective. * fix: chessboard unit test - overwrite of default parameter flag of findCirclesGrid * chessboard: remove trailing whitespace * chessboard: fix debug drawing * chessboard: fix some issues during code review * chessboard: normalize asymmetric chessboard * chessboard: fix float double warning * remove trailing whitespace * chessboards: fix compiler warnings * chessboards: fix compiler warnings * checkerboard: some performance improvements * chessboard: remove NULL macros for language bindinges from internal headers * chessboard: shorten license terms * chessboard: remove unused internal method * chessboard: set helper functions to static * chessboard: fix normalizePoints1D using unshifted points * chessboard: remove wrongly copied text * chessboard: use CV_CheckTypeEQ macro * chessboard: comment all NaN checks * chessboard: use consistent color conversion * chessboard: use CheckChannelEQ macro * chessboard: assume gray color image for internal methods * chessboard: use std::swap * chessboard: use Mat.dataend * chessboard: fix compiler warnings * chessboard: replace some checks witch CV_CHECK macro * chessboard: fix comparison function for partial sort * chessboard: small cleanup * chessboard: use short license header * chessboard: rename findChessboard2 to findChessboardSB * chessboard: fix type in unit test |
7 years ago |