ClassesClasses | | Operators

project_object_model_3dT_project_object_model_3dProjectObjectModel3dProjectObjectModel3d (Operator)

Name

project_object_model_3dT_project_object_model_3dProjectObjectModel3dProjectObjectModel3d — Project a 3D object model into image coordinates.

Signature

project_object_model_3d( : ModelContours : ObjectModel3D, CamParam, Pose, GenParamName, GenParamValue : )

Herror T_project_object_model_3d(Hobject* ModelContours, const Htuple ObjectModel3D, const Htuple CamParam, const Htuple Pose, const Htuple GenParamName, const Htuple GenParamValue)

void ProjectObjectModel3d(HObject* ModelContours, const HTuple& ObjectModel3D, const HTuple& CamParam, const HTuple& Pose, const HTuple& GenParamName, const HTuple& GenParamValue)

HXLDCont HObjectModel3D::ProjectObjectModel3d(const HCamPar& CamParam, const HPose& Pose, const HTuple& GenParamName, const HTuple& GenParamValue) const

HXLDCont HObjectModel3D::ProjectObjectModel3d(const HCamPar& CamParam, const HPose& Pose, const HString& GenParamName, const HString& GenParamValue) const

HXLDCont HObjectModel3D::ProjectObjectModel3d(const HCamPar& CamParam, const HPose& Pose, const char* GenParamName, const char* GenParamValue) const

HXLDCont HCamPar::ProjectObjectModel3d(const HObjectModel3D& ObjectModel3D, const HPose& Pose, const HTuple& GenParamName, const HTuple& GenParamValue) const

HXLDCont HCamPar::ProjectObjectModel3d(const HObjectModel3D& ObjectModel3D, const HPose& Pose, const HString& GenParamName, const HString& GenParamValue) const

HXLDCont HCamPar::ProjectObjectModel3d(const HObjectModel3D& ObjectModel3D, const HPose& Pose, const char* GenParamName, const char* GenParamValue) const

HXLDCont HPose::ProjectObjectModel3d(const HObjectModel3D& ObjectModel3D, const HCamPar& CamParam, const HTuple& GenParamName, const HTuple& GenParamValue) const

HXLDCont HPose::ProjectObjectModel3d(const HObjectModel3D& ObjectModel3D, const HCamPar& CamParam, const HString& GenParamName, const HString& GenParamValue) const

HXLDCont HPose::ProjectObjectModel3d(const HObjectModel3D& ObjectModel3D, const HCamPar& CamParam, const char* GenParamName, const char* GenParamValue) const

static void HOperatorSet.ProjectObjectModel3d(out HObject modelContours, HTuple objectModel3D, HTuple camParam, HTuple pose, HTuple genParamName, HTuple genParamValue)

HXLDCont HObjectModel3D.ProjectObjectModel3d(HCamPar camParam, HPose pose, HTuple genParamName, HTuple genParamValue)

HXLDCont HObjectModel3D.ProjectObjectModel3d(HCamPar camParam, HPose pose, string genParamName, string genParamValue)

HXLDCont HCamPar.ProjectObjectModel3d(HObjectModel3D objectModel3D, HPose pose, HTuple genParamName, HTuple genParamValue)

HXLDCont HCamPar.ProjectObjectModel3d(HObjectModel3D objectModel3D, HPose pose, string genParamName, string genParamValue)

HXLDCont HPose.ProjectObjectModel3d(HObjectModel3D objectModel3D, HCamPar camParam, HTuple genParamName, HTuple genParamValue)

HXLDCont HPose.ProjectObjectModel3d(HObjectModel3D objectModel3D, HCamPar camParam, string genParamName, string genParamValue)

Description

The operator project_object_model_3dproject_object_model_3dProjectObjectModel3dProjectObjectModel3dProjectObjectModel3d projects a 3D object model into the image coordinate system and returns the projected contours in ModelContoursModelContoursModelContoursModelContoursmodelContours. This operator is particularly useful for the visualization of 3D object models. Note that primitives are not projected but silently ignored. The coordinates of the 3D object model are given in the 3D world coordinate system. First, they are transformed into the camera coordinate system using the given PosePosePosePosepose. Then, these coordinates are projected into the image coordinate system based on the internal camera parameters CamParamCamParamCamParamCamParamcamParam.

The internal camera parameters CamParamCamParamCamParamCamParamcamParam describe the projection characteristics of the camera (see calibrate_camerascalibrate_camerasCalibrateCamerasCalibrateCamerasCalibrateCameras). The PosePosePosePosepose describes the position and orientation of the world coordinate system with respect to the camera coordinate system.

There are some generic parameters that can optionally be used to influence the projection. If desired, these parameters and their corresponding values can be specified by using GenParamNameGenParamNameGenParamNameGenParamNamegenParamName and GenParamValueGenParamValueGenParamValueGenParamValuegenParamValue, respectively. The following values for GenParamNameGenParamNameGenParamNameGenParamNamegenParamName are possible:

'data'"data""data""data""data":

This parameter specifies which geometric data of the 3D object model should be projected. If 'data'"data""data""data""data" is set to 'faces'"faces""faces""faces""faces", the faces of the 3D object model are projected. The faces are represented by their border lines in ModelContoursModelContoursModelContoursModelContoursmodelContours. If 'data'"data""data""data""data" is set to 'lines'"lines""lines""lines""lines", the 3D lines of the 3D object model are projected. If 'data'"data""data""data""data" is set to 'points'"points""points""points""points", the points of the 3D object model are projected. The projected points can be represented in ModelContoursModelContoursModelContoursModelContoursmodelContours in different ways. The point representation can be selected by using the generic parameter 'point_shape'"point_shape""point_shape""point_shape""point_shape" (see below). Finally, if 'data'"data""data""data""data" is set to 'auto'"auto""auto""auto""auto", HALCON automatically chooses the most descriptive geometry data that is available in the 3D object model for visualization.

List of values: 'auto'"auto""auto""auto""auto", 'faces'"faces""faces""faces""faces", 'lines'"lines""lines""lines""lines", 'points'"points""points""points""points"

Default value: 'auto'"auto""auto""auto""auto"

'point_shape'"point_shape""point_shape""point_shape""point_shape":

This parameter specifies how points are represented in the output contour ModelContoursModelContoursModelContoursModelContoursmodelContours. Consequently, this parameter only has an effect if the points of the 3D object model are selected for projection (see above). If 'point_shape'"point_shape""point_shape""point_shape""point_shape" is set to 'circle'"circle""circle""circle""circle", points are represented by circles, whereas if 'point_shape'"point_shape""point_shape""point_shape""point_shape" is set to 'cross'"cross""cross""cross""cross", points are represented by crosses. In both cases the size of the points (i.e., the size of the circles or the size of the crosses) can be specified by the generic parameter 'point_size'"point_size""point_size""point_size""point_size" (see below). The orientation of the crosses can be specified by the generic parameter 'point_orientation'"point_orientation""point_orientation""point_orientation""point_orientation" (see below).

List of values: 'circle'"circle""circle""circle""circle", 'cross'"cross""cross""cross""cross"

Default value: 'circle'"circle""circle""circle""circle"

'point_size'"point_size""point_size""point_size""point_size":

This parameter specifies the size of the point representation in the output contour ModelContoursModelContoursModelContoursModelContoursmodelContours, i.e., the size of the circles or the size of the crosses depending on the selected 'point_shape'"point_shape""point_shape""point_shape""point_shape". Consequently, this parameter only has an effect if the points of the 3D object model are selected for projection (see above). The size must be given in pixel units. If 'point_size'"point_size""point_size""point_size""point_size" is set to 0, each point is represented by a contour that contains a single contour point.

Suggested values: 0, 2, 4

Default value: 4

'point_orientation'"point_orientation""point_orientation""point_orientation""point_orientation":

This parameter specifies the orientation of the crosses in radians. Consequently, this parameter only has an effect if the points of the 3D object model are selected for projection and 'point_shape'"point_shape""point_shape""point_shape""point_shape" is set to 'cross'"cross""cross""cross""cross" (see above).

Suggested values: 0, 0.39, 0.79

Default value: 0.79

'union_adjacent_contours'"union_adjacent_contours""union_adjacent_contours""union_adjacent_contours""union_adjacent_contours":

This parameter specifies if adjacent projected contours should be joined or not. Activating this option is equivalent to calling union_adjacent_contours_xldunion_adjacent_contours_xldUnionAdjacentContoursXldUnionAdjacentContoursXldUnionAdjacentContoursXld after this operator, but significantly faster.

List of values: 'true'"true""true""true""true", 'false'"false""false""false""false"

Default value: 'true'"true""true""true""true"

'hidden_surface_removal'"hidden_surface_removal""hidden_surface_removal""hidden_surface_removal""hidden_surface_removal":

This parameter can be used to switch on or off the removal of hidden surfaces. If 'hidden_surface_removal'"hidden_surface_removal""hidden_surface_removal""hidden_surface_removal""hidden_surface_removal" is set to 'true'"true""true""true""true", only those projected edges are returned that are not hidden by faces of the 3D object model. If 'hidden_surface_removal'"hidden_surface_removal""hidden_surface_removal""hidden_surface_removal""hidden_surface_removal" is set to 'false'"false""false""false""false", all projected edges are returned. This is faster than a projection with 'hidden_surface_removal'"hidden_surface_removal""hidden_surface_removal""hidden_surface_removal""hidden_surface_removal" set to 'true'"true""true""true""true".

If the system variable (see set_systemset_systemSetSystemSetSystemSetSystem) 'opengl_hidden_surface_removal_enable'"opengl_hidden_surface_removal_enable""opengl_hidden_surface_removal_enable""opengl_hidden_surface_removal_enable""opengl_hidden_surface_removal_enable" is set to 'true'"true""true""true""true" (which is the default if it is available) and 'hidden_surface_removal'"hidden_surface_removal""hidden_surface_removal""hidden_surface_removal""hidden_surface_removal" is set to 'true'"true""true""true""true", the projection of the model is accelerated using the graphics card. Depending on the graphics card this is significantly faster than the non accelerated algorithm. Be aware that the results of the OpenGL projection are slightly different compared to the analytic projection. Notable, only the contours visible through CamParamCamParamCamParamCamParamcamParam are projected in this mode.

List of values: 'true'"true""true""true""true", 'false'"false""false""false""false"

Default value: 'true'"true""true""true""true"

'min_face_angle'"min_face_angle""min_face_angle""min_face_angle""min_face_angle":

3D edges are only projected if the angle between the two 3D faces that are incident with the 3D edge is at least 'min_face_angle'"min_face_angle""min_face_angle""min_face_angle""min_face_angle". If 'min_face_angle'"min_face_angle""min_face_angle""min_face_angle""min_face_angle" is set to 0.0, all edges are projected. If 'min_face_angle'"min_face_angle""min_face_angle""min_face_angle""min_face_angle" is set to (equivalent to 180 degrees), only the silhouette of the 3D object model is returned. This parameter can be used to suppress edges within curved surfaces, e.g., the surface of a cylinder or cone.

Suggested values: 0.17, 0.26, 0.35, 0.52

Default value: 0.52

Attention

Cameras with hypercentric lenses are not supported.

Execution Information

Parameters

ModelContoursModelContoursModelContoursModelContoursmodelContours (output_object)  xld_cont(-array) objectHXLDContHXLDContHobject *

Projected model contours.

ObjectModel3DObjectModel3DObjectModel3DObjectModel3DobjectModel3D (input_control)  object_model_3d HObjectModel3D, HTupleHTupleHtuple (handle) (IntPtr) (HHandle) (handle)

Handle of the 3D object model.

CamParamCamParamCamParamCamParamcamParam (input_control)  campar HCamPar, HTupleHTupleHtuple (real / integer / string) (double / int / long / string) (double / Hlong / HString) (double / Hlong / char*)

Internal camera parameters.

PosePosePosePosepose (input_control)  pose HPose, HTupleHTupleHtuple (real / integer) (double / int / long) (double / Hlong) (double / Hlong)

3D pose of the world coordinate system in camera coordinates.

Number of elements: Pose == 7

GenParamNameGenParamNameGenParamNameGenParamNamegenParamName (input_control)  string(-array) HTupleHTupleHtuple (string) (string) (HString) (char*)

Name of the generic parameter.

Default value: []

List of values: 'data'"data""data""data""data", 'false'"false""false""false""false", 'hidden_surface_removal'"hidden_surface_removal""hidden_surface_removal""hidden_surface_removal""hidden_surface_removal", 'min_face_angle'"min_face_angle""min_face_angle""min_face_angle""min_face_angle", 'point_orientation'"point_orientation""point_orientation""point_orientation""point_orientation", 'point_shape'"point_shape""point_shape""point_shape""point_shape", 'point_size'"point_size""point_size""point_size""point_size", 'true'"true""true""true""true", 'union_adjacent_contours'"union_adjacent_contours""union_adjacent_contours""union_adjacent_contours""union_adjacent_contours"

GenParamValueGenParamValueGenParamValueGenParamValuegenParamValue (input_control)  string(-array) HTupleHTupleHtuple (string / integer / real) (string / int / long / double) (HString / Hlong / double) (char* / Hlong / double)

Value of the generic parameter.

Default value: []

Suggested values: 0.17, 0.26, 0.35, 0.52, 'true'"true""true""true""true", 'false'"false""false""false""false", 'auto'"auto""auto""auto""auto", 'points'"points""points""points""points", 'faces'"faces""faces""faces""faces", 'lines'"lines""lines""lines""lines", 'circle'"circle""circle""circle""circle", 'cross'"cross""cross""cross""cross", 1, 2, 3, 4, 0.785398

Result

project_object_model_3dproject_object_model_3dProjectObjectModel3dProjectObjectModel3dProjectObjectModel3d returns 2 (H_MSG_TRUE) if all parameters are correct. If necessary, an exception is raised. If the geometric data that was selected for the projection is not available in the 3D object model, the error 9514 is raised.

Possible Predecessors

read_object_model_3dread_object_model_3dReadObjectModel3dReadObjectModel3dReadObjectModel3d, affine_trans_object_model_3daffine_trans_object_model_3dAffineTransObjectModel3dAffineTransObjectModel3dAffineTransObjectModel3d, prepare_object_model_3dprepare_object_model_3dPrepareObjectModel3dPrepareObjectModel3dPrepareObjectModel3d

Possible Successors

clear_object_model_3dclear_object_model_3dClearObjectModel3dClearObjectModel3dClearObjectModel3d

See also

project_shape_model_3dproject_shape_model_3dProjectShapeModel3dProjectShapeModel3dProjectShapeModel3d, object_model_3d_to_xyzobject_model_3d_to_xyzObjectModel3dToXyzObjectModel3dToXyzObjectModel3dToXyz

Module

3D Metrology


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