Name
gray_erosion_shapegray_erosion_shapeGrayErosionShapegray_erosion_shapeGrayErosionShapeGrayErosionShape — Determine the minimum gray value within a selected mask.
void GrayErosionShape(const HObject& Image, HObject* ImageMin, const HTuple& MaskHeight, const HTuple& MaskWidth, const HTuple& MaskShape)
HImage HImage::GrayErosionShape(const HTuple& MaskHeight, const HTuple& MaskWidth, const HString& MaskShape) const
HImage HImage::GrayErosionShape(double MaskHeight, double MaskWidth, const HString& MaskShape) const
HImage HImage::GrayErosionShape(double MaskHeight, double MaskWidth, const char* MaskShape) const
gray_erosion_shapegray_erosion_shapeGrayErosionShapegray_erosion_shapeGrayErosionShapeGrayErosionShape calculates the minimum gray value of the input
image ImageImageImageImageImageimage within a mask of shape MaskShapeMaskShapeMaskShapeMaskShapeMaskShapemaskShape,
vertical size MaskHeightMaskHeightMaskHeightMaskHeightMaskHeightmaskHeight and horizontal size MaskWidthMaskWidthMaskWidthMaskWidthMaskWidthmaskWidth
for each image point.
The resulting image is returned in ImageMinImageMinImageMinImageMinImageMinimageMin.
If the parameters MaskHeightMaskHeightMaskHeightMaskHeightMaskHeightmaskHeight or MaskWidthMaskWidthMaskWidthMaskWidthMaskWidthmaskWidth are of the
type integer and are even, they are changed to the next larger odd value.
In contrast, if at least one of the two parameters is of the type float, the
input image ImageImageImageImageImageimage is transformed with both the next larger and
the next smaller odd mask size, and the output image ImageMinImageMinImageMinImageMinImageMinimageMin is
interpolated from the two intermediate images. Therefore, note that
gray_erosion_shapegray_erosion_shapeGrayErosionShapegray_erosion_shapeGrayErosionShapeGrayErosionShape returns different results for mask sizes of,
e.g., 4 and 4.0!
In case of the values
'rhombus' and 'octagon' for the MaskShapeMaskShapeMaskShapeMaskShapeMaskShapemaskShape control parameter,
MaskHeightMaskHeightMaskHeightMaskHeightMaskHeightmaskHeight and MaskWidthMaskWidthMaskWidthMaskWidthMaskWidthmaskWidth must be equal. The parameter
value 'octagon' for MaskShapeMaskShapeMaskShapeMaskShapeMaskShapemaskShape denotes an equilateral octagonal
mask which is a suitable approximation for a circular structure.
At the border of the image the gray values are mirrored.
Note that gray_erosion_shapegray_erosion_shapeGrayErosionShapegray_erosion_shapeGrayErosionShapeGrayErosionShape requires considerably more time for
mask sizes of type float than for mask sizes of type integer. This is
especially true for rectangular masks with differnt width and height!
gray_erosion_shapegray_erosion_shapeGrayErosionShapegray_erosion_shapeGrayErosionShapeGrayErosionShape can be executed on OpenCL devices. In case of
mask sizes of type float the result can vary slightly from the CPU as the
interpolation is calculated in single precision on the OpenCL device.
- Supports OpenCL compute devices.
- 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.
Image for which the minimum gray values are to
be calculated.
Image containing the minimum gray values.
Height of the filter mask.
Default value: 11
Suggested values: 3, 5, 7, 9, 11, 13, 15
Typical range of values: 1.0
≤
MaskHeight
MaskHeight
MaskHeight
MaskHeight
MaskHeight
maskHeight
Width of the filter mask.
Default value: 11
Suggested values: 3, 5, 7, 9, 11, 13, 15
Typical range of values: 1.0
≤
MaskWidth
MaskWidth
MaskWidth
MaskWidth
MaskWidth
maskWidth
Shape of the mask.
Default value:
'octagon'
"octagon"
"octagon"
"octagon"
"octagon"
"octagon"
List of values: 'octagon'"octagon""octagon""octagon""octagon""octagon", 'rectangle'"rectangle""rectangle""rectangle""rectangle""rectangle", 'rhombus'"rhombus""rhombus""rhombus""rhombus""rhombus"
gray_erosion_shapegray_erosion_shapeGrayErosionShapegray_erosion_shapeGrayErosionShapeGrayErosionShape returns 2 (H_MSG_TRUE) if all
parameters are correct.
gray_erosiongray_erosionGrayErosiongray_erosionGrayErosionGrayErosion,
gray_erosion_rectgray_erosion_rectGrayErosionRectgray_erosion_rectGrayErosionRectGrayErosionRect
gray_opening_shapegray_opening_shapeGrayOpeningShapegray_opening_shapeGrayOpeningShapeGrayOpeningShape,
gray_closing_shapegray_closing_shapeGrayClosingShapegray_closing_shapeGrayClosingShapeGrayClosingShape,
gray_skeletongray_skeletonGraySkeletongray_skeletonGraySkeletonGraySkeleton
Foundation