backport of opencv 4.0.1

Author: jeroen

README.md

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+# OpenCV 4
+
+Backported with https://github.com/r-windows/rtools-backports
+

include/opencv4/opencv2/aruco.hpp

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+/*
+By downloading, copying, installing or using the software you agree to this
+license. If you do not agree to this license, do not download, install,
+copy or use the software.
+
+                          License Agreement
+               For Open Source Computer Vision Library
+                       (3-clause BSD License)
+
+Copyright (C) 2013, OpenCV Foundation, all rights reserved.
+Third party copyrights are property of their respective owners.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright notice,
+    this list of conditions and the following disclaimer.
+
+  * Redistributions in binary form must reproduce the above copyright notice,
+    this list of conditions and the following disclaimer in the documentation
+    and/or other materials provided with the distribution.
+
+  * Neither the names of the copyright holders nor the names of the contributors
+    may be used to endorse or promote products derived from this software
+    without specific prior written permission.
+
+This software is provided by the copyright holders and contributors "as is" and
+any express or implied warranties, including, but not limited to, the implied
+warranties of merchantability and fitness for a particular purpose are
+disclaimed. In no event shall copyright holders or contributors be liable for
+any direct, indirect, incidental, special, exemplary, or consequential damages
+(including, but not limited to, procurement of substitute goods or services;
+loss of use, data, or profits; or business interruption) however caused
+and on any theory of liability, whether in contract, strict liability,
+or tort (including negligence or otherwise) arising in any way out of
+the use of this software, even if advised of the possibility of such damage.
+*/
+
+#ifndef __OPENCV_DICTIONARY_HPP__
+#define __OPENCV_DICTIONARY_HPP__
+
+#include <opencv2/core.hpp>
+
+namespace cv {
+namespace aruco {
+
+//! @addtogroup aruco
+//! @{
+
+
+/**
+ * @brief Dictionary/Set of markers. It contains the inner codification
+ *
+ * bytesList contains the marker codewords where
+ * - bytesList.rows is the dictionary size
+ * - each marker is encoded using `nbytes = ceil(markerSize*markerSize/8.)`
+ * - each row contains all 4 rotations of the marker, so its length is `4*nbytes`
+ *
+ * `bytesList.ptr(i)[k*nbytes + j]` is then the j-th byte of i-th marker, in its k-th rotation.
+ */
+class CV_EXPORTS_W Dictionary {
+
+    public:
+    CV_PROP_RW Mat bytesList;         // marker code information
+    CV_PROP_RW int markerSize;        // number of bits per dimension
+    CV_PROP_RW int maxCorrectionBits; // maximum number of bits that can be corrected
+
+
+    /**
+      */
+    Dictionary(const Mat &_bytesList = Mat(), int _markerSize = 0, int _maxcorr = 0);
+
+
+    /**
+    Dictionary(const Dictionary &_dictionary);
+    */
+
+
+    /**
+      */
+    Dictionary(const Ptr<Dictionary> &_dictionary);
+
+
+    /**
+     * @see generateCustomDictionary
+     */
+    CV_WRAP_AS(create) static Ptr<Dictionary> create(int nMarkers, int markerSize, int randomSeed=0);
+
+
+    /**
+     * @see generateCustomDictionary
+     */
+    CV_WRAP_AS(create_from) static Ptr<Dictionary> create(int nMarkers, int markerSize,
+            const Ptr<Dictionary> &baseDictionary, int randomSeed=0);
+
+    /**
+     * @see getPredefinedDictionary
+     */
+    CV_WRAP static Ptr<Dictionary> get(int dict);
+
+    /**
+     * @brief Given a matrix of bits. Returns whether if marker is identified or not.
+     * It returns by reference the correct id (if any) and the correct rotation
+     */
+    bool identify(const Mat &onlyBits, int &idx, int &rotation, double maxCorrectionRate) const;
+
+    /**
+      * @brief Returns the distance of the input bits to the specific id. If allRotations is true,
+      * the four posible bits rotation are considered
+      */
+    int getDistanceToId(InputArray bits, int id, bool allRotations = true) const;
+
+
+    /**
+     * @brief Draw a canonical marker image
+     */
+    CV_WRAP void drawMarker(int id, int sidePixels, OutputArray _img, int borderBits = 1) const;
+
+
+    /**
+      * @brief Transform matrix of bits to list of bytes in the 4 rotations
+      */
+    CV_WRAP static Mat getByteListFromBits(const Mat &bits);
+
+
+    /**
+      * @brief Transform list of bytes to matrix of bits
+      */
+    CV_WRAP static Mat getBitsFromByteList(const Mat &byteList, int markerSize);
+};
+
+
+
+
+/**
+ * @brief Predefined markers dictionaries/sets
+ * Each dictionary indicates the number of bits and the number of markers contained
+ * - DICT_ARUCO_ORIGINAL: standard ArUco Library Markers. 1024 markers, 5x5 bits, 0 minimum
+                          distance
+ */
+enum PREDEFINED_DICTIONARY_NAME {
+    DICT_4X4_50 = 0,
+    DICT_4X4_100,
+    DICT_4X4_250,
+    DICT_4X4_1000,
+    DICT_5X5_50,
+    DICT_5X5_100,
+    DICT_5X5_250,
+    DICT_5X5_1000,
+    DICT_6X6_50,
+    DICT_6X6_100,
+    DICT_6X6_250,
+    DICT_6X6_1000,
+    DICT_7X7_50,
+    DICT_7X7_100,
+    DICT_7X7_250,
+    DICT_7X7_1000,
+    DICT_ARUCO_ORIGINAL,
+    DICT_APRILTAG_16h5,     ///< 4x4 bits, minimum hamming distance between any two codes = 5, 30 codes
+    DICT_APRILTAG_25h9,     ///< 5x5 bits, minimum hamming distance between any two codes = 9, 35 codes
+    DICT_APRILTAG_36h10,    ///< 6x6 bits, minimum hamming distance between any two codes = 10, 2320 codes
+    DICT_APRILTAG_36h11     ///< 6x6 bits, minimum hamming distance between any two codes = 11, 587 codes
+};
+
+
+/**
+  * @brief Returns one of the predefined dictionaries defined in PREDEFINED_DICTIONARY_NAME
+  */
+CV_EXPORTS Ptr<Dictionary> getPredefinedDictionary(PREDEFINED_DICTIONARY_NAME name);
+
+
+/**
+  * @brief Returns one of the predefined dictionaries referenced by DICT_*.
+  */
+CV_EXPORTS_W Ptr<Dictionary> getPredefinedDictionary(int dict);
+
+
+/**
+  * @see generateCustomDictionary
+  */
+CV_EXPORTS_AS(custom_dictionary) Ptr<Dictionary> generateCustomDictionary(
+        int nMarkers,
+        int markerSize,
+        int randomSeed=0);
+
+
+/**
+  * @brief Generates a new customizable marker dictionary
+  *
+  * @param nMarkers number of markers in the dictionary
+  * @param markerSize number of bits per dimension of each markers
+  * @param baseDictionary Include the markers in this dictionary at the beginning (optional)
+  * @param randomSeed a user supplied seed for theRNG()
+  *
+  * This function creates a new dictionary composed by nMarkers markers and each markers composed
+  * by markerSize x markerSize bits. If baseDictionary is provided, its markers are directly
+  * included and the rest are generated based on them. If the size of baseDictionary is higher
+  * than nMarkers, only the first nMarkers in baseDictionary are taken and no new marker is added.
+  */
+CV_EXPORTS_AS(custom_dictionary_from) Ptr<Dictionary> generateCustomDictionary(
+        int nMarkers,
+        int markerSize,
+        const Ptr<Dictionary> &baseDictionary,
+        int randomSeed=0);
+
+
+
+//! @}
+}
+}
+
+#endif