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project_3d_pointT_project_3d_pointProject3dPointproject_3d_pointProject3dPointProject3dPoint (Operator)

Name

project_3d_pointT_project_3d_pointProject3dPointproject_3d_pointProject3dPointProject3dPoint — Project 3D points into (sub-)pixel image coordinates.

Signature

project_3d_point( : : X, Y, Z, CameraParam : Row, Column)

Herror T_project_3d_point(const Htuple X, const Htuple Y, const Htuple Z, const Htuple CameraParam, Htuple* Row, Htuple* Column)

Herror project_3d_point(const HTuple& X, const HTuple& Y, const HTuple& Z, const HTuple& CameraParam, HTuple* Row, HTuple* Column)

void Project3dPoint(const HTuple& X, const HTuple& Y, const HTuple& Z, const HTuple& CameraParam, HTuple* Row, HTuple* Column)

static void HMisc::Project3dPoint(const HTuple& X, const HTuple& Y, const HTuple& Z, const HTuple& CameraParam, HTuple* Row, HTuple* Column)

void HOperatorSetX.Project3dPoint(
[in] VARIANT X, [in] VARIANT Y, [in] VARIANT Z, [in] VARIANT CameraParam, [out] VARIANT* Row, [out] VARIANT* Column)

VARIANT HMiscX.Project3dPoint(
[in] VARIANT X, [in] VARIANT Y, [in] VARIANT Z, [in] VARIANT CameraParam, [out] VARIANT* Column)

static void HOperatorSet.Project3dPoint(HTuple x, HTuple y, HTuple z, HTuple cameraParam, out HTuple row, out HTuple column)

static void HMisc.Project3dPoint(HTuple x, HTuple y, HTuple z, HTuple cameraParam, out HTuple row, out HTuple column)

Description

project_3d_pointproject_3d_pointProject3dPointproject_3d_pointProject3dPointProject3dPoint projects one or more 3D points (with coordinates XXXXXx, YYYYYy, and ZZZZZz) into the image plane (in pixels) and returns the result in RowRowRowRowRowrow and ColumnColumnColumnColumnColumncolumn. The coordinates XXXXXx, YYYYYy, and ZZZZZz are given in the camera coordinate system, i.e., they describe the position of the points relative to the camera.

The internal camera parameters CameraParamCameraParamCameraParamCameraParamCameraParamcameraParam describe the projection characteristics of the camera (see calibrate_camerascalibrate_camerasCalibrateCamerascalibrate_camerasCalibrateCamerasCalibrateCameras for details).

Parallelization

Parameters

XXXXXx (input_control)  point3d.x-array HTupleHTupleHTupleVARIANTHtuple (real) (double) (double) (double) (double) (double)

X coordinates of the 3D points to be projected in the camera coordinate system.

YYYYYy (input_control)  point3d.y-array HTupleHTupleHTupleVARIANTHtuple (real) (double) (double) (double) (double) (double)

Y coordinates of the 3D points to be projected in the camera coordinate system.

ZZZZZz (input_control)  point3d.z-array HTupleHTupleHTupleVARIANTHtuple (real) (double) (double) (double) (double) (double)

Z coordinates of the 3D points to be projected in the camera coordinate system.

CameraParamCameraParamCameraParamCameraParamCameraParamcameraParam (input_control)  number-array HTupleHTupleHTupleVARIANTHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong) (double / Hlong) (double / Hlong)

Internal camera parameters.

Number of elements: CameraParam == 8 || CameraParam == 10 || CameraParam == 11 || CameraParam == 12 || CameraParam == 14

RowRowRowRowRowrow (output_control)  point.y-array HTupleHTupleHTupleVARIANTHtuple (real) (double) (double) (double) (double) (double)

Row coordinates of the projected points (in pixels).

ColumnColumnColumnColumnColumncolumn (output_control)  point.x-array HTupleHTupleHTupleVARIANTHtuple (real) (double) (double) (double) (double) (double)

Column coordinates of the projected points (in pixels).

Example (HDevelop)

*  read pose of the world coordinate system in camera coordinates
read_pose('worldpose.dat', WorldPose)
*  convert pose into transformation matrix
pose_to_hom_mat3d(WorldPose, HomMat3D)
*  transform 3D points from world into the camera coordinate system
affine_trans_point_3d(HomMat3D, [3.0, 3.2], [4.5, 4.5], [5.8, 6.2], X, Y, Z)
*  read internal camera parameters
read_cam_par('campar.dat', CameraParam)
* project 3D points into image
project_3d_point(X, Y, Z, CameraParam, Row, Column)

Example (HDevelop)

*  read pose of the world coordinate system in camera coordinates
read_pose('worldpose.dat', WorldPose)
*  convert pose into transformation matrix
pose_to_hom_mat3d(WorldPose, HomMat3D)
*  transform 3D points from world into the camera coordinate system
affine_trans_point_3d(HomMat3D, [3.0, 3.2], [4.5, 4.5], [5.8, 6.2], X, Y, Z)
*  read internal camera parameters
read_cam_par('campar.dat', CameraParam)
* project 3D points into image
project_3d_point(X, Y, Z, CameraParam, Row, Column)

Example (HDevelop)

*  read pose of the world coordinate system in camera coordinates
read_pose('worldpose.dat', WorldPose)
*  convert pose into transformation matrix
pose_to_hom_mat3d(WorldPose, HomMat3D)
*  transform 3D points from world into the camera coordinate system
affine_trans_point_3d(HomMat3D, [3.0, 3.2], [4.5, 4.5], [5.8, 6.2], X, Y, Z)
*  read internal camera parameters
read_cam_par('campar.dat', CameraParam)
* project 3D points into image
project_3d_point(X, Y, Z, CameraParam, Row, Column)

Example (C++ (HALCON 5.0-10.0))

HTuple WorldPose, HomMat3D, X1, Y1, Z1, X2, Y2, Z2;
HTuple CameraParam, Row, Column;
//  read pose of the world coordinate system in camera coordinates
read_pose("worldpose.dat", &WorldPose);
//  convert pose into transformation matrix
pose_to_hom_mat3d(WorldPose, &HomMat3D);
//  transform 3D points from source into destination coordinate system
X1[1] = 3.2;
X1[0] = 3.0;
Y1[1] = 4.5;
Y1[0] = 4.5;
Z1[1] = 6.2;
Z1[0] = 5.8;
affine_trans_point_3d(HomMat3D, X1, Y1, Z1, &X2, &Y2, &Z2);
// read internal camera parameters
read_cam_par("campar.dat", &CameraParam);
// project 3D points into image
project_3d_point(X2, Y2, Z2, CameraParam, &Row, &Column);

Example (HDevelop)

*  read pose of the world coordinate system in camera coordinates
read_pose('worldpose.dat', WorldPose)
*  convert pose into transformation matrix
pose_to_hom_mat3d(WorldPose, HomMat3D)
*  transform 3D points from world into the camera coordinate system
affine_trans_point_3d(HomMat3D, [3.0, 3.2], [4.5, 4.5], [5.8, 6.2], X, Y, Z)
*  read internal camera parameters
read_cam_par('campar.dat', CameraParam)
* project 3D points into image
project_3d_point(X, Y, Z, CameraParam, Row, Column)

Example (HDevelop)

*  read pose of the world coordinate system in camera coordinates
read_pose('worldpose.dat', WorldPose)
*  convert pose into transformation matrix
pose_to_hom_mat3d(WorldPose, HomMat3D)
*  transform 3D points from world into the camera coordinate system
affine_trans_point_3d(HomMat3D, [3.0, 3.2], [4.5, 4.5], [5.8, 6.2], X, Y, Z)
*  read internal camera parameters
read_cam_par('campar.dat', CameraParam)
* project 3D points into image
project_3d_point(X, Y, Z, CameraParam, Row, Column)

Result

project_3d_pointproject_3d_pointProject3dPointproject_3d_pointProject3dPointProject3dPoint returns 2 (H_MSG_TRUE) if all parameter values are correct. If necessary, an exception is raised.

Possible Predecessors

read_cam_parread_cam_parReadCamParread_cam_parReadCamParReadCamPar, affine_trans_point_3daffine_trans_point_3dAffineTransPoint3daffine_trans_point_3dAffineTransPoint3dAffineTransPoint3d

Possible Successors

gen_region_pointsgen_region_pointsGenRegionPointsgen_region_pointsGenRegionPointsGenRegionPoints, gen_region_polygongen_region_polygonGenRegionPolygongen_region_polygonGenRegionPolygonGenRegionPolygon, disp_polygondisp_polygonDispPolygondisp_polygonDispPolygonDispPolygon

See also

camera_calibrationcamera_calibrationCameraCalibrationcamera_calibrationCameraCalibrationCameraCalibration, disp_caltabdisp_caltabDispCaltabdisp_caltabDispCaltabDispCaltab, read_cam_parread_cam_parReadCamParread_cam_parReadCamParReadCamPar, get_line_of_sightget_line_of_sightGetLineOfSightget_line_of_sightGetLineOfSightGetLineOfSight, affine_trans_point_3daffine_trans_point_3dAffineTransPoint3daffine_trans_point_3dAffineTransPoint3dAffineTransPoint3d

Module

Calibration


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