midrange_imagemidrange_imagemidrange_imageMidrangeImageMidrangeImage (Operator)

Name

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

Signature

Description

The operator midrange_imagemidrange_imagemidrange_imageMidrangeImageMidrangeImage 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.

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 channel level.
• Automatically parallelized on domain level.

Parameters

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");
disp_image(Midrange,WindowHandle);

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')
disp_image(Midrange,WindowHandle)

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

Complexity

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

Result

If the parameter values are correct the operator midrange_imagemidrange_imagemidrange_imageMidrangeImageMidrangeImage 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>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>). If necessary an exception is raised.

Possible Predecessors

read_imageread_imageread_imageReadImageReadImage, draw_regiondraw_regiondraw_regionDrawRegionDrawRegion, gen_circlegen_circlegen_circleGenCircleGenCircle, gen_rectangle1gen_rectangle1gen_rectangle1GenRectangle1GenRectangle1

Possible Successors

thresholdthresholdthresholdThresholdThreshold, dyn_thresholddyn_thresholddyn_thresholdDynThresholdDynThreshold, regiongrowingregiongrowingregiongrowingRegiongrowingRegiongrowing

Alternatives

sigma_imagesigma_imagesigma_imageSigmaImageSigmaImage

See also

gen_circlegen_circlegen_circleGenCircleGenCircle, gen_rectangle1gen_rectangle1gen_rectangle1GenRectangle1GenRectangle1, gray_erosion_rectgray_erosion_rectgray_erosion_rectGrayErosionRectGrayErosionRect, gray_dilation_rectgray_dilation_rectgray_dilation_rectGrayDilationRectGrayDilationRect, gray_range_rectgray_range_rectgray_range_rectGrayRangeRectGrayRangeRect

References

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

Module

Foundation