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FOpenCVHelper

API > API/Plugins > API/Plugins/OpenCVHelper

   
Name FOpenCVHelper
Type class
Header File /Engine/Plugins/Runtime/OpenCV/Source/OpenCVHelper/Public/OpenCVHelper.h
Include Path #include "OpenCVHelper.h"

Syntax

class FOpenCVHelper

Enums

Public

Name Remarks
EAxis Enumeration to specify any cartesian axis in positive or negative directions

Constants

Name Type Remarks Include Path
UnitVectors const TArray< FVector > These axes must match the order in which they are declared in EAxis. OpenCVHelper.h

Functions

Static

Name Remarks Include Path Unreal Specifiers

static double ComputeReprojectionError ( const TArray< FVector >& ObjectPoints,
const TArray< FVector2f >& ImagePoints,
const FVector2D& FocalLength,
const FVector2D& ImageCenter,
const FTransform& CameraPose
)

 Project the 3D objects points to the 2D image plane represented by the input camera intrinsics and pose, and compute the reprojection error (euclidean distance) between the input image points and the reprojected points OpenCVHelper.h  

static void ConvertCoordinateSystem ( FTransform& Transform,
const EAxis DstXInSrcAxis,
const EAxis DstYInSrcAxis,
const EAxis DstZInSrcAxis
)

 Converts in-place the coordinate system of the given FTransform by specifying the source axes in terms of the destination axes OpenCVHelper.h  

static void ConvertOpenCVToUnreal ( FTransform& Transform
)

 Converts in-place an FTransform in OpenCV coordinates to Unreal coordinates OpenCVHelper.h  

static FVector ConvertOpenCVToUnreal ( const FVector& Transform
)

 Converts an FTransform in OpenCV coordinates to Unreal coordinates OpenCVHelper.h  

static void ConvertUnrealToOpenCV ( FTransform& Transform
)

 Converts in-place an FTransform in Unreal coordinates to OpenCV coordinates OpenCVHelper.h  

static FVector ConvertUnrealToOpenCV ( const FVector& Transform
)

 Converts an FVector in Unreal coordinates to OpenCV coordinates OpenCVHelper.h  

static bool DrawArucoMarkers ( const TArray< FArucoMarker >& Markers,
UTexture2D* DebugTexture
)

 Draw a debug view of the input aruco markers on top of the input texture OpenCVHelper.h  

static bool DrawCheckerboardCorners ( const TArray< FVector2f >& Corners,
FIntPoint CheckerboardDimensions,
UTexture2D* DebugTexture
)

 Draw a debug view of the input checkerboard corners on top of the input texture OpenCVHelper.h  

static bool DrawCheckerboardCorners ( const TArray< FVector2D >& Corners,
FIntPoint CheckerboardDimensions,
UTexture2D* DebugTexture
)

 Draw a debug view of the input checkerboard corners on top of the input texture OpenCVHelper.h  

static bool FitLine3D ( const TArray< FVector >& InPoints,
FVector& OutLine,
FVector& OutPointOnLine
)

 Find a 3D fit line that passes through the input points, as well as a point on that line OpenCVHelper.h  

static bool IdentifyArucoMarkers ( TArray< FColor >& Image,
FIntPoint ImageSize,
EArucoDictionary DictionaryName,
TArray< FArucoMarker >& OutMarkers
)

 Identify a set of aruco markers in the input image that belong to the input aruco dictionary, and output the marker IDs and the 2D coordinates of the 4 corners of each marker OpenCVHelper.h  

static bool IdentifyCheckerboard ( TArray< FColor >& Image,
FIntPoint ImageSize,
FIntPoint CheckerboardDimensions,
TArray< FVector2f >& OutCorners
)

 Identify a checkerboard pattern in the input image with the given checkerboard dimensions (columns x rows), and output the 2D coordinates of the intersections between each checkerboard square OpenCVHelper.h  

static bool IdentifyCheckerboard ( TArray< FColor >& Image,
FIntPoint ImageSize,
FIntRect RegionOfInterest,
FIntPoint CheckerboardDimensions,
TArray< FVector2f >& OutCorners
)

 Identify a checkerboard pattern in a region of interest of the input image with the given checkerboard dimensions (columns x rows), and output the 2D coordinates of the intersections between each checkerboard square OpenCVHelper.h  

static bool ProjectPoints ( const TArray< FVector >& ObjectPoints,
const FVector2D& FocalLength,
const FVector2D& ImageCenter,
const TArray< float >& DistortionParameters,
const FTransform& CameraPose,
TArray< FVector2f >& OutImagePoints
)

 Project the input object points to the 2D image plane defined by the input camera intrinsics and camera pose OpenCVHelper.h  

static bool ProjectPoints ( const TArray< FVector >& ObjectPoints,
const FVector2D& FocalLength,
const FVector2D& ImageCenter,
const TArray< float >& DistortionParameters,
const FTransform& CameraPose,
TArray< FVector2D >& OutImagePoints
)

 Project the input object points to the 2D image plane defined by the input camera intrinsics and camera pose OpenCVHelper.h  

static bool SolvePnP ( const TArray< FVector >& ObjectPoints,
const TArray< FVector2f >& ImagePoints,
const FVector2D& FocalLength,
const FVector2D& ImageCenter,
const TArray< float >& DistortionParameters,
FTransform& OutCameraPose
)

 Compute the camera pose that minimizes the reprojection error of the input object points and image points OpenCVHelper.h  

static const FVector & UnitVectorFromAxisEnum ( const EAxis Axis
)

   OpenCVHelper.h  

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