opencv on mbed
Moments Class Reference
[Structural Analysis and Shape Descriptors]
struct returned by cv::moments More...
#include <types.hpp>
Public Member Functions | |
Moments () | |
the default constructor | |
Moments (double m00, double m10, double m01, double m20, double m11, double m02, double m30, double m21, double m12, double m03) | |
the full constructor | |
Data Fields | |
spatial moments | |
CV_PROP_RW double | m00 |
CV_PROP_RW double | m10 |
CV_PROP_RW double | m01 |
CV_PROP_RW double | m20 |
CV_PROP_RW double | m11 |
CV_PROP_RW double | m02 |
CV_PROP_RW double | m30 |
CV_PROP_RW double | m21 |
CV_PROP_RW double | m12 |
CV_PROP_RW double | m03 |
central moments | |
CV_PROP_RW double | mu20 |
CV_PROP_RW double | mu11 |
CV_PROP_RW double | mu02 |
CV_PROP_RW double | mu30 |
CV_PROP_RW double | mu21 |
CV_PROP_RW double | mu12 |
CV_PROP_RW double | mu03 |
central normalized moments | |
CV_PROP_RW double | nu20 |
CV_PROP_RW double | nu11 |
CV_PROP_RW double | nu02 |
CV_PROP_RW double | nu30 |
CV_PROP_RW double | nu21 |
CV_PROP_RW double | nu12 |
CV_PROP_RW double | nu03 |
Detailed Description
struct returned by cv::moments
The spatial moments are computed as:
The central moments are computed as:
where is the mass center:
The normalized central moments are computed as:
- Note:
- , , hence the values are not stored.
The moments of a contour are defined in the same way but computed using the Green's formula (see <http://en.wikipedia.org/wiki/Green_theorem>). So, due to a limited raster resolution, the moments computed for a contour are slightly different from the moments computed for the same rasterized contour.
- Note:
- Since the contour moments are computed using Green formula, you may get seemingly odd results for contours with self-intersections, e.g. a zero area (m00) for butterfly-shaped contours.
Definition at line 838 of file types.hpp.
Constructor & Destructor Documentation
Moments | ( | ) |
the default constructor
Moments | ( | double | m00, |
double | m10, | ||
double | m01, | ||
double | m20, | ||
double | m11, | ||
double | m02, | ||
double | m30, | ||
double | m21, | ||
double | m12, | ||
double | m03 | ||
) |
the full constructor
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