compare_ext_variation_modelcompare_ext_variation_modelcompare_ext_variation_modelCompareExtVariationModelCompareExtVariationModel (Operator)

Name

compare_ext_variation_modelcompare_ext_variation_modelcompare_ext_variation_modelCompareExtVariationModelCompareExtVariationModel — Compare an image to a variation model.

Signature

Description

compare_ext_variation_modelcompare_ext_variation_modelcompare_ext_variation_modelCompareExtVariationModelCompareExtVariationModel compares the input image ImageImageImageImageimage to the variation model given by ModelIDModelIDModelIDModelIDmodelID. compare_ext_variation_modelcompare_ext_variation_modelcompare_ext_variation_modelCompareExtVariationModelCompareExtVariationModel is an extension of compare_variation_modelcompare_variation_modelcompare_variation_modelCompareVariationModelCompareVariationModel that provides more modes for the image comparison. Before compare_ext_variation_modelcompare_ext_variation_modelcompare_ext_variation_modelCompareExtVariationModelCompareExtVariationModel can be called, the two internal threshold images of the variation model must have been created with prepare_variation_modelprepare_variation_modelprepare_variation_modelPrepareVariationModelPrepareVariationModel or prepare_direct_variation_modelprepare_direct_variation_modelprepare_direct_variation_modelPrepareDirectVariationModelPrepareDirectVariationModel. Let c(x,y) denote the input image ImageImageImageImageimage and t{u,l} denote the two threshold images (see prepare_variation_modelprepare_variation_modelprepare_variation_modelPrepareVariationModelPrepareVariationModel or prepare_direct_variation_modelprepare_direct_variation_modelprepare_direct_variation_modelPrepareDirectVariationModelPrepareDirectVariationModel). Then, for ModeModeModeModemode = 'absolute'"absolute""absolute""absolute""absolute" the output region RegionRegionRegionRegionregion contains all points that differ substantially from the model, i.e., the points that fulfill the following condition:

  c(x,y) > t{u}(x,y) or c(x,y) < t{l}(x,y) .

This mode is identical to compare_variation_modelcompare_variation_modelcompare_variation_modelCompareVariationModelCompareVariationModel. For ModeModeModeModemode = 'light'"light""light""light""light", RegionRegionRegionRegionregion contains all points that are too bright:

  c(x,y) > t{u}(x,y) .

For ModeModeModeModemode = 'dark'"dark""dark""dark""dark", RegionRegionRegionRegionregion contains all points that are too dark:

  c(x,y) < t{l}(x,y) .

Finally, for ModeModeModeModemode = 'light_dark'"light_dark""light_dark""light_dark""light_dark" two regions are returned in RegionRegionRegionRegionregion. The first region contains the result of ModeModeModeModemode = 'light'"light""light""light""light", while the second region contains the result of ModeModeModeModemode = 'dark'"dark""dark""dark""dark". The respective regions can be selected with select_objselect_objselect_objSelectObjSelectObj.

Parallelization

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Automatically parallelized on tuple level.
• Automatically parallelized on domain level.

Parameters

Example (HDevelop)

open_framegrabber ('File', 1, 1, 0, 0, 0, 0, 'default', -1, \
                   'default', -1, 'default', 'model.seq', 'default', \
                   -1, -1, AcqHandle)
read_region (Region, 'model.reg')
area_center (Region, Area, RowRef, ColumnRef)
read_shape_model ('model.shm', TemplateID)
read_variation_model ('model.var', ModelID)
for K := 1 to 10000 by 1
    grab_image (Image, AcqHandle)
    find_shape_model (Image, TemplateID, 0, rad(360), 0.5, 1, 0.5, \
                      'true', 4, 0.9, Row, Column, Angle, Score)
    disp_obj (Image, WindowHandle)
    if (|Score| = 1)
        vector_angle_to_rigid (Row, Column, Angle, RowRef, \
                               ColumnRef, 0, HomMat2D)
        affine_trans_image (Image, ImageTrans, HomMat2D, 'constant', \
                            'false')
        compare_ext_variation_model (ImageTrans, RegionDiff, ModelID, \
                                     'light')
        disp_obj (RegionDiff, WindowHandle)
    endif
endfor
clear_shape_model (TemplateID)
clear_variation_model (ModelID)
close_framegrabber (AcqHandle)

Result

compare_ext_variation_modelcompare_ext_variation_modelcompare_ext_variation_modelCompareExtVariationModelCompareExtVariationModel returns 2 (H_MSG_TRUE) if all parameters are correct and if the internal threshold images have been generated with prepare_variation_modelprepare_variation_modelprepare_variation_modelPrepareVariationModelPrepareVariationModel or prepare_direct_variation_modelprepare_direct_variation_modelprepare_direct_variation_modelPrepareDirectVariationModelPrepareDirectVariationModel.

Possible Predecessors

prepare_variation_modelprepare_variation_modelprepare_variation_modelPrepareVariationModelPrepareVariationModel, prepare_direct_variation_modelprepare_direct_variation_modelprepare_direct_variation_modelPrepareDirectVariationModelPrepareDirectVariationModel

Possible Successors

select_objselect_objselect_objSelectObjSelectObj, connectionconnectionconnectionConnectionConnection

Alternatives

compare_variation_modelcompare_variation_modelcompare_variation_modelCompareVariationModelCompareVariationModel, dyn_thresholddyn_thresholddyn_thresholdDynThresholdDynThreshold

See also

get_thresh_images_variation_modelget_thresh_images_variation_modelget_thresh_images_variation_modelGetThreshImagesVariationModelGetThreshImagesVariationModel

Module

Matching