《Learning OpenCV3》——第五章 大型数据操作
第五章 大型数据操作
- 第五章 大型数据操作
- Mat的操作
上一章介绍了OpenCV3大型数据的存储如cv::Mat<>和cv::SparseMat<>以及它们的一些基本操作。这一章将继续介绍针对Mat类型的一些其他常用操作。
Mat的操作
| 函数 | 描述 |
|---|---|
| cv::abs() | Return absolute value of all elements in an array |
| cv::absdiff() | Return absolute value of differences between two arrays |
| cv::add() | Perform element-wise addition of two arrays |
| cv::addWeighted() | Perform element-wise weighted addition of two arrays (alpha blending) |
| cv::bitwise_and() | Compute element-wise bit-level AND of two arrays |
| cv::bitwise_not() | Compute element-wise bit-level NOT of two arrays |
| cv::bitwise_or() | Compute element-wise bit-level OR of two arrays |
| cv::bitwise_xor() | Compute element-wise bit-level XOR of two arrays |
| cv::calcCovarMatrix() | Compute covariance of a set of n-dimensional vectors |
| cv::cartToPolar() | Compute angle and magnitude from a two-dimensional vector field |
| cv::checkRange() | Check array for invalid values |
| cv::compare() | Apply selected comparison operator to all elements in two arrays |
| cv::completeSymm() | Symmetrize matrix by copying elements from one half to the other |
| cv::convertScaleAbs() | Scale array, take absolute value, then convert to 8-bit unsigned |
| cv::countNonZero() | Count nonzero elements in an array |
| cv::arrToMat() | Convert pre–version 2.1 array types to cv::Mat |
| cv::dct() | Compute discrete cosine transform of array |
| cv::determinant() | Compute determinant of a square matrix |
| cv::dft() | Compute discrete Fourier transform of array |
| cv::divide() | Perform element-wise division of one array by another |
| cv::eigen() | Compute eigenvalues and eigenvectors of a square matrix |
| cv::exp() | Perform element-wise exponentiation of array |
| cv::extractImageCOI() | Extract single channel from pre–version 2.1 array type |
| cv::flip() | Flip an array about a selected axis |
| cv::gemm() | Perform generalized matrix multiplication |
| cv::getConvertElem() | Get a single-pixel type conversion function |
| cv::getConvertScaleElem() | Get a single-pixel type conversion and scale function |
| cv::idct() | Compute inverse discrete cosine transform of array |
| cv::idft() | Compute inverse discrete Fourier transform of array |
| cv::inRange() | Test if elements of an array are within values of two other arrays |
| cv::invert() | Invert a square matrix |
| cv::log() | Compute element-wise natural log of array |
| cv::magnitude() | Compute magnitudes from a two-dimensional vector field |
| cv::LUT() | Convert array to indices of a lookup table |
| cv::Mahalanobis() | Compute Mahalanobis distance between two vectors |
| cv::max() | Compute element-wise maxima between two arrays |
| cv::mean() | Compute the average of the array elements |
| cv::meanStdDev() | Compute the average and standard deviation of the array elements |
| cv::merge() | Merge several single-channel arrays into one multichannel array |
| cv::min() | Compute element-wise minima between two arrays |
| cv::minMaxLoc() | Find minimum and maximum values in an array |
| cv::mixChannels() | Shuffle channels from input arrays to output arrays |
| cv::mulSpectrums() | Compute element-wise multiplication of two Fourier spectra |
| cv::multiply() | Perform element-wise multiplication of two arrays |
| cv::mulTransposed() | Calculate matrix product of one array |
| cv::norm() | Compute normalized correlations between two arrays |
| cv::normalize() | Normalize elements in an array to some value |
| cv::perspectiveTransform(） | Perform perspective matrix transform of a list of vectors |
| cv::phase() | Compute orientations from a two-dimensional vector field |
| cv::polarToCart() | Compute two-dimensional vector field from angles and magnitudes |
| cv::pow() | Raise every element of an array to a given power |
| cv::randu() | Fill a given array with uniformly distributed random numbers |
| cv::randn() | Fill a given array with normally distributed random numbers |
| cv::randShuffle() | Randomly shuffle array elements |
| cv::reduce() | Reduce a two-dimensional array to a vector by a given operation |
| cv::repeat() | Tile the contents of one array into another |
| cv::saturate_cast<>() | Convert primitive types (template function) |
| cv::scaleAdd() | Compute element-wise sum of two arrays with optional scaling of the first |
| cv::setIdentity() | Set all elements of an array to 1 for the diagonal and 0 otherwise |
| cv::solve() | Solve a system of linear equations |
| cv::solveCubic() | Find the (only) real roots of a cubic equation |
| cv::solvePoly() | Find the complex roots of a polynomial equation |
| cv::sort() | Sort elements in either the rows or columns in an array |
| cv::sortIdx() | Serve same purpose as cv::sort(), except array is unmodified and indices arereturned |
| cv::split() | Split a multichannel array into multiple single-channel arrays |
| cv::sqrt() | Compute element-wise square root of an array |
| cv::subtract() | Perform element-wise subtraction of one array from another |
| cv::sum() | Sum all elements of an array |
| cv::theRNG() | Return a random number generator |
| cv::trace() | Compute the trace of an array |
| cv::transform() | Apply matrix transformation on every element of an array |
| cv::transpose() | Transpose all elements of an array across the diagonal |