Name
area_center_grayarea_center_grayAreaCenterGrayarea_center_grayAreaCenterGrayAreaCenterGray — Compute the area and center of gravity of a region in a gray value
image.
Herror area_center_gray(Hobject Regions, Hobject Image, double* Area, double* Row, double* Column)
Herror area_center_gray(Hobject Regions, Hobject Image, HTuple* Area, HTuple* Row, HTuple* Column)
double HRegion::AreaCenterGray(const HImage& Image, double* Row, double* Column) const
HTuple HRegionArray::AreaCenterGray(const HImage& Image, HTuple* Row, HTuple* Column) const
void AreaCenterGray(const HObject& Regions, const HObject& Image, HTuple* Area, HTuple* Row, HTuple* Column)
HTuple HImage::AreaCenterGray(const HRegion& Regions, HTuple* Row, HTuple* Column) const
double HImage::AreaCenterGray(const HRegion& Regions, double* Row, double* Column) const
HTuple HRegion::AreaCenterGray(const HImage& Image, HTuple* Row, HTuple* Column) const
double HRegion::AreaCenterGray(const HImage& Image, double* Row, double* Column) const
static void HOperatorSet.AreaCenterGray(HObject regions, HObject image, out HTuple area, out HTuple row, out HTuple column)
HTuple HImage.AreaCenterGray(HRegion regions, out HTuple row, out HTuple column)
double HImage.AreaCenterGray(HRegion regions, out double row, out double column)
HTuple HRegion.AreaCenterGray(HImage image, out HTuple row, out HTuple column)
double HRegion.AreaCenterGray(HImage image, out double row, out double column)
area_center_grayarea_center_grayAreaCenterGrayarea_center_grayAreaCenterGrayAreaCenterGray computes the area and center of gravity of
the regions RegionsRegionsRegionsRegionsRegionsregions that have gray values which are defined
by the image ImageImageImageImageImageimage. This operator is similar to
area_centerarea_centerAreaCenterarea_centerAreaCenterAreaCenter, but in contrast to that operator, the gray
values of the image are taken into account while computing the area
and center of gravity.
The area A of a region R in the image with the gray values
g(r,c) is defined as
---
\
A = / g(r,c) .
---
(r,c) in R
This means that the area is defined by the volume of the gray
value function g(r,c). The center of gravity is defined by the
first two normalized moments of the gray values g(r,c), i.e., by
(m10,m01), where
---
1 \ p q
m = - / r c g(r,c) .
p,q A ---
(r,c) in R
Note that the operator area_center_grayarea_center_grayAreaCenterGrayarea_center_grayAreaCenterGrayAreaCenterGray only considers
the given RegionsRegionsRegionsRegionsRegionsregions and ignores any previously set domain
of the input image ImageImageImageImageImageimage.
area_center_grayarea_center_grayAreaCenterGrayarea_center_grayAreaCenterGrayAreaCenterGray can be executed on OpenCL devices if the device
supports the cl_khr_fp64 and cl_khr_int64_base_atomics OpenCL extensions.
- 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.
Region(s) to be examined.
Gray value volume of the region.
Row coordinate of the gray value center of gravity.
Column coordinate of the gray value center of gravity.
area_center_grayarea_center_grayAreaCenterGrayarea_center_grayAreaCenterGrayAreaCenterGray returns 2 (H_MSG_TRUE) if all parameters are correct
and no error occurs during execution. If the input is empty the
behavior can be set via
set_system(::'no_object_result',<Result>:)set_system("no_object_result",<Result>)SetSystem("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.
thresholdthresholdThresholdthresholdThresholdThreshold,
regiongrowingregiongrowingRegiongrowingregiongrowingRegiongrowingRegiongrowing,
connectionconnectionConnectionconnectionConnectionConnection
area_centerarea_centerAreaCenterarea_centerAreaCenterAreaCenter
area_center_xldarea_center_xldAreaCenterXldarea_center_xldAreaCenterXldAreaCenterXld,
elliptic_axis_grayelliptic_axis_grayEllipticAxisGrayelliptic_axis_grayEllipticAxisGrayEllipticAxisGray
Foundation