* **CV_COMP_INTERSECT** Intersection
* **CV_COMP_BHATTACHARYYA** Bhattacharyya distance
+
+ * **CV_COMP_HELLINGER** Synonym for ``CV_COMP_BHATTACHARYYA``
The functions ``compareHist`` compare two dense or two sparse histograms using the specified method:
-* Correlation (method=CV\_COMP\_CORREL)
+* Correlation (``method=CV_COMP_CORREL``)
.. math::
and
:math:`N` is a total number of histogram bins.
-* Chi-Square (method=CV\_COMP\_CHISQR)
+* Chi-Square (``method=CV_COMP_CHISQR``)
.. math::
d(H_1,H_2) = \sum _I \frac{\left(H_1(I)-H_2(I)\right)^2}{H_1(I)}
-* Intersection (method=CV\_COMP\_INTERSECT)
+* Intersection (``method=CV_COMP_INTERSECT``)
.. math::
d(H_1,H_2) = \sum _I \min (H_1(I), H_2(I))
-* Bhattacharyya distance (method=CV\_COMP\_BHATTACHARYYA)
+* Bhattacharyya distance (``method=CV_COMP_BHATTACHARYYA`` or ``method=CV_COMP_HELLINGER``). In fact, OpenCV computes Hellinger distance, which is related to Bhattacharyya coefficient.
.. math::
CV_COMP_CORREL =0,
CV_COMP_CHISQR =1,
CV_COMP_INTERSECT =2,
- CV_COMP_BHATTACHARYYA =3
+ CV_COMP_BHATTACHARYYA =3,
+ CV_COMP_HELLINGER =CV_COMP_BHATTACHARYYA
};
/* Mask size for distance transform */