update_bg_estiT_update_bg_estiUpdateBgEstiUpdateBgEsti (Operator)

Name

update_bg_estiT_update_bg_estiUpdateBgEstiUpdateBgEsti — Change the estimated background image.

Signature

update_bg_esti(PresentImage, UpDateRegion : : BgEstiHandle : )

Description

update_bg_estiupdate_bg_estiUpdateBgEstiUpdateBgEstiUpdateBgEsti overwrites the image stored in the current BgEsti data set with the grayvalues of PresentImagePresentImagePresentImagePresentImagepresentImage within the bounds of UpDateRegionUpDateRegionUpDateRegionUpDateRegionupDateRegion. This can be used for a “hard” adaptation: Image regions with a sudden change in (known) background can be adapted very fast this way.

Attention

The passed image (PresentImagePresentImagePresentImagePresentImagepresentImage) must have the same type and size as the background image of the current data set (initialized with create_bg_esticreate_bg_estiCreateBgEstiCreateBgEstiCreateBgEsti).

Execution Information

Multithreading type: reentrant (runs in parallel with non-exclusive operators).
Multithreading scope: global (may be called from any thread).
Processed without parallelization.

Parameters

PresentImagePresentImagePresentImagePresentImagepresentImage (input_object) singlechannelimage → object (byte / real)

Current image.

UpDateRegionUpDateRegionUpDateRegionUpDateRegionupDateRegion (input_object) region → object

Region describing areas to change.

BgEstiHandleBgEstiHandleBgEstiHandleBgEstiHandlebgEstiHandle (input_control) bg_estimation → (handle)

ID of the BgEsti data set.

Example (HDevelop)

* read Init-Image:
read_image(InitImage,'xing/init')
* initialize BgEsti-Dataset with
* fixed gains and threshold adaption
create_bg_esti(InitImage,0.7,0.7,'fixed',0.002,0.02, \
               'on',7,10,3.25,15.0,BgEstiHandle)
* read the next image in sequence:
read_image(Image0,'xing/xing000')
* estimate the Background:
run_bg_esti(Image0,Region1,BgEstiHandle)
* use the Region and the information of a knowledge base
* to calculate the UpDateRegion
update_bg_esti(Image0,UpdateRegion,BgEstiHandle)
* then read the next image in sequence:
read_image(Image1,'xing/xing001')
* estimate the Background:
run_bg_esti(Image1,Region2,BgEstiHandle)
* etc.

Result

update_bg_estiupdate_bg_estiUpdateBgEstiUpdateBgEstiUpdateBgEsti returns 2 (H_MSG_TRUE) if all parameters are correct.

Possible Predecessors

run_bg_estirun_bg_estiRunBgEstiRunBgEstiRunBgEsti

Possible Successors