midrange_imagemidrange_imageMidrangeImageMidrangeImage (Operator)

Name

midrange_imagemidrange_imageMidrangeImageMidrangeImage — Calculate the average of maximum and minimum inside any mask.

Signature

Description

The operator midrange_imagemidrange_imageMidrangeImageMidrangeImageMidrangeImage forms the average of maximum and minimum inside the indicated mask in the whole image. Several border treatments (MarginMarginMarginMarginmargin) can be chosen for filtering: gray value Pixels outside of the image edges are assumed to be constant (with the indicated gray value). 'continued' Continuation of edge pixels. 'cyclic' Cyclic continuation of image edges. 'mirrored' Reflection of pixels at the image edges. The indicated mask (= region of the mask image) is put over the image to be filtered in such a way that the center of the mask touches all pixels once.

For an explanation of the concept of smoothing filters see the introduction of chapter Filters / Smoothing.

Attention

Note that filter operators may return unexpected results if an image with a reduced domain is used as input. Please refer to the chapter Filters.

Execution Information

• 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 channel level.
• Automatically parallelized on domain level.

Parameters

read_image(Image,'fabrik')
draw_region(Region,WindowHandle)
midrange_image(Image,Region,Midrange,'mirrored')
dev_display(Midrange)

read_image(&Image,"fabrik");
draw_region(&Region,WindowHandle);
midrange_image(Image,Region,&Midrange,"mirrored");
disp_image(Midrange,WindowHandle);

read_image(Image,'fabrik')
draw_region(Region,WindowHandle)
midrange_image(Image,Region,Midrange,'mirrored')
dev_display(Midrange)

read_image(Image,'fabrik')
draw_region(Region,WindowHandle)
midrange_image(Image,Region,Midrange,'mirrored')
dev_display(Midrange)

read_image(Image,'fabrik')
draw_region(Region,WindowHandle)
midrange_image(Image,Region,Midrange,'mirrored')
dev_display(Midrange)

Complexity

For each pixel: O(sqrt(F) * 5) with F = area of MaskMaskMaskMaskmask.

Result

If the parameter values are correct the operator midrange_imagemidrange_imageMidrangeImageMidrangeImageMidrangeImage returns the value 2 (H_MSG_TRUE). The behavior in case of empty input (no input images available) is set via the operator set_system('no_object_result',<Result>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>). If necessary an exception is raised.

Possible Predecessors

read_imageread_imageReadImageReadImageReadImage, draw_regiondraw_regionDrawRegionDrawRegionDrawRegion, gen_circlegen_circleGenCircleGenCircleGenCircle, gen_rectangle1gen_rectangle1GenRectangle1GenRectangle1GenRectangle1

Possible Successors

thresholdthresholdThresholdThresholdThreshold, dyn_thresholddyn_thresholdDynThresholdDynThresholdDynThreshold, regiongrowingregiongrowingRegiongrowingRegiongrowingRegiongrowing

Alternatives

sigma_imagesigma_imageSigmaImageSigmaImageSigmaImage

See also

gen_circlegen_circleGenCircleGenCircleGenCircle, gen_rectangle1gen_rectangle1GenRectangle1GenRectangle1GenRectangle1, gray_erosion_rectgray_erosion_rectGrayErosionRectGrayErosionRectGrayErosionRect, gray_dilation_rectgray_dilation_rectGrayDilationRectGrayDilationRectGrayDilationRect, gray_range_rectgray_range_rectGrayRangeRectGrayRangeRectGrayRangeRect

References

R. Haralick, L. Shapiro; “Computer and Robot Vision”; Addison-Wesley, 1992, Seite 319

Module

Foundation