utility.hpp#

#include <opencv2/core.hpp>
#include <ostream>
#include <functional>
#include <mutex>

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Classes#

class cv::AutoBuffer

Automatically Allocated Buffer Class. More…

class cv::CommandLineParser

Designed for command line parsing. More…

class cv::Node

class cv::ParallelLoopBody

Base class for parallel data processors. More…

class cv::ParallelLoopBodyLambdaWrapper

class cv::TickMeter

a Class to measure passing time. More…

namespace cv

namespace cv::samples

namespace cv::utils

enum cv::AlgorithmHint {
ALGO_HINT_DEFAULT = 0,
ALGO_HINT_ACCURATE = 1,
ALGO_HINT_APPROX = 2
}

Flags that allow to modify some functions’ behavior. Used as set of flags. More…

void cv::parallel_for_ (const Range &range, const ParallelLoopBody &body, double nstripes=-1.)

Parallel data processor.

static void cv::parallel_for_ (const Range &range, std::function< void(const Range &)> functor, double nstripes=-1.)

static _Tp * cv::alignPtr (_Tp *ptr, int n=(int) sizeof(_Tp))

Aligns a pointer to the specified number of bytes.

static size_t cv::alignSize (size_t sz, int n)

Aligns a buffer size to the specified number of bytes.

bool cv::checkHardwareSupport (int feature)

Returns true if the specified feature is supported by the host hardware.

static int cv::divUp (int a, unsigned int b)

Integer division with result round up.

static size_t cv::divUp (size_t a, unsigned int b)

const String & cv::getBuildInformation ()

Returns full configuration time cmake output.

std::string cv::getCPUFeaturesLine ()

Returns list of CPU features enabled during compilation.

int64 cv::getCPUTickCount ()

Returns the number of CPU ticks.

AlgorithmHint cv::getDefaultAlgorithmHint ()

Returns AlgorithmHint defined during OpenCV compilation. Defines ALGO_HINT_DEFAULT behavior.

static size_t cv::getElemSize (int type)

String cv::getHardwareFeatureName (int feature)

Returns feature name by ID.

int cv::getNumberOfCPUs ()

Returns the number of logical CPUs available for the process.

int cv::getNumThreads ()

Returns the number of threads used by OpenCV for parallel regions.

int cv::getThreadNum ()

Returns the index of the currently executed thread within the current parallel region. Always returns 0 if called outside of parallel region.

int64 cv::getTickCount ()

Returns the number of ticks.

double cv::getTickFrequency ()

Returns the number of ticks per second.

int cv::getVersionMajor ()

Returns major library version.

int cv::getVersionMinor ()

Returns minor library version.

int cv::getVersionRevision ()

Returns revision field of the library version.

String cv::getVersionString ()

Returns library version string.

void cv::glob (String pattern, std::vector< String > &result, bool recursive=false)

Searches for files matching the specified pattern in a directory.

static bool cv::isAligned (const T &data)

Alignment check of passed values.

static bool cv::isAligned (const void *p1)

static bool cv::isAligned (const void *p1, const void *p2)

static bool cv::isAligned (const void *p1, const void *p2, const void *p3)

static bool cv::isAligned (const void *p1, const void *p2, const void *p3, const void *p4)

static std::ostream & cv::operator<< (std::ostream &out, const TickMeter &tm)

output operator

ErrorCallback cv::redirectError (ErrorCallback errCallback, void *userdata=0, void **prevUserdata=0)

Sets the new error handler and the optional user data.

static int cv::roundUp (int a, unsigned int b)

Round first value up to the nearest multiple of second value.

static size_t cv::roundUp (size_t a, unsigned int b)

bool cv::setBreakOnError (bool flag)

Sets/resets the break-on-error mode.

void cv::setNumThreads (int nthreads)

OpenCV will try to set the number of threads for subsequent parallel regions.

void cv::setUseOptimized (bool onoff)

Enables or disables the optimized code.

String cv::tempfile (const char *suffix=0)

Generates a unique temporary file name.

bool cv::useOptimized ()

Returns the status of optimized code usage.

void cv::samples::addSamplesDataSearchPath (const cv::String &path)

Override search data path by adding new search location.

void cv::samples::addSamplesDataSearchSubDirectory (const cv::String &subdir)

Append samples search data sub directory.

cv::String cv::samples::findFile (const cv::String &relative_path, bool required=true, bool silentMode=false)

Try to find requested data file.

cv::String cv::samples::findFileOrKeep (const cv::String &relative_path, bool silentMode=false)