unreal.OpenCVBlueprintFunctionLibrary

class unreal.OpenCVBlueprintFunctionLibrary(outer=None, name='None')

Bases: unreal.BlueprintFunctionLibrary

Open CVBlueprint Function Library

C++ Source:

  • Plugin: OpenCV

  • Module: OpenCVHelper

  • File: OpenCVBlueprintFunctionLibrary.h

classmethod open_cv_aruco_detect_markers(render_target, dictionary, dictionary_size, debug_draw_markers, estimate_pose, marker_length_in_meters, lens_distortion_parameters) -> (int32, out_debug_texture=Texture2D, out_detected_markers=Array(OpenCVArucoDetectedMarker))

Detects all ArUco markers in the supplied image

Parameters

  • render_target (TextureRenderTarget2D) – Input image in which to search for markers

  • dictionary (OpenCVArucoDictionary) – Which ArUco marker dictionary to use for detection

  • dictionary_size (OpenCVArucoDictionarySize) – The size of the ArUco marker dictionary

  • debug_draw_markers (bool) – If true, output a Texture2D showing the detected marker debug info overlaid on the input image

  • estimate_pose (bool) – If true, return the 3D pose for each marker relative to the camera position

  • marker_length_in_meters (float) – Length in meters of one side of the physical marker (required if bEstimatePose is True)

  • lens_distortion_parameters (OpenCVLensDistortionParametersBase) –

Returns

Total number of markers detected in the input image

out_debug_texture (Texture2D): Output debug image (required if bDebugDrawMarkers is True)

out_detected_markers (Array(OpenCVArucoDetectedMarker)): Output array of markers detected in the input image

Return type

tuple

classmethod open_cv_chessboard_detect_corners(render_target, pattern_size, debug_draw_corners) -> (int32, out_debug_texture=Texture2D, out_detected_corners=Array(Vector2D))

Detects a camera calibration chessboard in the supplied image

Parameters

  • render_target (TextureRenderTarget2D) – Input image in which to search for a chessboard

  • pattern_size (IntPoint) – Number of interior corners on the physical chessboard (rows, columns)

  • debug_draw_corners (bool) – If true, output a Texture2D showing the detected corner debug info overlaid on the input image

Returns

Total number of corners detected in the input image

out_debug_texture (Texture2D): Output debug image (required if bDebugDrawCorners is True)

out_detected_corners (Array(Vector2D)): Output array of corners detected in the input image

Return type

tuple