reset_obj_dbreset_obj_dbResetObjDbResetObjDb (Operator)


reset_obj_dbreset_obj_dbResetObjDbResetObjDb — Reset the HALCON system for iconic objects.


reset_obj_db( : : DefaultImageWidth, DefaultImageHeight, DefaultChannels : )

Herror reset_obj_db(const Hlong DefaultImageWidth, const Hlong DefaultImageHeight, const Hlong DefaultChannels)

Herror T_reset_obj_db(const Htuple DefaultImageWidth, const Htuple DefaultImageHeight, const Htuple DefaultChannels)

void ResetObjDb(const HTuple& DefaultImageWidth, const HTuple& DefaultImageHeight, const HTuple& DefaultChannels)

static void HSystem::ResetObjDb(Hlong DefaultImageWidth, Hlong DefaultImageHeight, Hlong DefaultChannels)

static void HOperatorSet.ResetObjDb(HTuple defaultImageWidth, HTuple defaultImageHeight, HTuple defaultChannels)

static void HSystem.ResetObjDb(int defaultImageWidth, int defaultImageHeight, int defaultChannels)


The operator reset_obj_dbreset_obj_dbResetObjDbResetObjDbResetObjDb reinitializes the HALCON system for iconic objects (which was set up during the HALCON initialization process). With this operator the five relations (grayvalue objects, region objects, XLD objects, image objects and object tuplets) which are used for image processing with HALCON will be installed (see also count_relationcount_relationCountRelationCountRelationCountRelation). In case the HALCON database was enabled (set_system('database','true')set_system("database","true")SetSystem("database","true")SetSystem("database","true")SetSystem("database","true")) and the relations already exist, all data entries listed in the relations will get deallocated!

The parameters DefaultImageWidthDefaultImageWidthDefaultImageWidthDefaultImageWidthdefaultImageWidth and DefaultImageHeightDefaultImageHeightDefaultImageHeightDefaultImageHeightdefaultImageHeight provide the initial values for the global maximum image size. If the first created object is an image, (e.g., read_imageread_imageReadImageReadImageReadImage), the set values will only be overruled, if they are smaller than the size of the created object. If on the other hand the first object to be created is a region, the values will only be adjusted in case the new image is larger than the set values. This is not only the case for the first image which is created or read: the global image size will always be enlarged, if larger images are created.

The global image size is of consequence for the opening of windows (open_windowopen_windowOpenWindowOpenWindowOpenWindow) and the memory estimate and clipping of regions. Whenever the clip mode is activated, regions will be clipped according to the global image size (set_system('clip_region','true')set_system("clip_region","true")SetSystem("clip_region","true")SetSystem("clip_region","true")SetSystem("clip_region","true")). This can lead to problems if images of various sizes are used. In this case only the fact that a region is smaller or of the same size as the largest image can be guaranteed.

The parameter DefaultChannelsDefaultChannelsDefaultChannelsDefaultChannelsdefaultChannels returns the most frequent number of channels of an image object. This value can be set to 0 if for the most part regions are used. If more channels than those having been set at the initialization are necessary for one image, the number will be enlarged dynamically for this image. If less channels than those having been set at the initialization are necessary for the image, the superfluous channels will be set as undefined. For the user this will seem as if they were non existent, however, memory is allocated unnecessarily.

The parameter values can be queried using the operator get_systemget_systemGetSystemGetSystemGetSystem.


If the operator reset_obj_dbreset_obj_dbResetObjDbResetObjDbResetObjDb is not called at the beginning of a HALCON session, HALCON will be initialized automatically by the operator reset_obj_db(128,128,0)reset_obj_db(128,128,0)ResetObjDb(128,128,0)ResetObjDb(128,128,0)ResetObjDb(128,128,0) causing side effects on region clipping, accordingly. When the database was enabled by the parameter value 'database' of the operator set_systemset_systemSetSystemSetSystemSetSystem, calling reset_obj_dbreset_obj_dbResetObjDbResetObjDbResetObjDb will deallocate all iconic objects.

Execution Information


DefaultImageWidthDefaultImageWidthDefaultImageWidthDefaultImageWidthdefaultImageWidth (input_control)  integer HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Default image width (in pixels).

Default value: 128

Suggested values: 64, 128, 320, 640, 800, 1280

DefaultImageHeightDefaultImageHeightDefaultImageHeightDefaultImageHeightdefaultImageHeight (input_control)  integer HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Default image height (in pixels).

Default value: 128

Suggested values: 64, 128, 240, 480, 600, 1024

DefaultChannelsDefaultChannelsDefaultChannelsDefaultChannelsdefaultChannels (input_control)  integer HTupleHTupleHtuple (integer) (int / long) (Hlong) (Hlong)

Usual number of channels.

Default value: 0

Suggested values: 0, 1, 2, 3, 4, 5, 6, 7


The operator reset_obj_dbreset_obj_dbResetObjDbResetObjDbResetObjDb returns the value 2 (H_MSG_TRUE) if the parameter values are correct. Otherwise an exception will be raised.

See also

get_channel_infoget_channel_infoGetChannelInfoGetChannelInfoGetChannelInfo, count_relationcount_relationCountRelationCountRelationCountRelation