diff --git a/openbr/core/qtutils.cpp b/openbr/core/qtutils.cpp
index 53ab3c4..c16a20b 100644
--- a/openbr/core/qtutils.cpp
+++ b/openbr/core/qtutils.cpp
@@ -478,5 +478,11 @@ float euclideanLength(const QPointF &point)
     return sqrt(pow(point.x(), 2) + pow(point.y(), 2));
 }
 
+float overlap(const QRectF &r, const QRectF &s) {
+    QRectF intersection = r & s;
+
+    return (intersection.width()*intersection.height())/(r.width()*r.height());
+}
+
 }  // namespace QtUtils
 
diff --git a/openbr/core/qtutils.h b/openbr/core/qtutils.h
index 5c11416..43d7720 100644
--- a/openbr/core/qtutils.h
+++ b/openbr/core/qtutils.h
@@ -89,6 +89,9 @@ namespace QtUtils
 
     /**** Point Utilities ****/
     float euclideanLength(const QPointF &point);
+
+    /**** Rect Utilities ****/
+    float overlap(const QRectF &r, const QRectF &s);
 }
 
 #endif // QTUTILS_QTUTILS_H