draw arc between p1 and p2 with line segment @param path @param p0 @param p1 @param p2 @param p3 @param point

composite a bitmap from alpha channel and specified color. @param image alpha mask, with RGB being 0x000000, anyway, it'll be overridden by new color.

Cubic interpolation http://www.paulinternet.nl/?page=bicubic https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Interpolation_on_the_unit_interval_wi

Java to C++ **************** //

This is the Point that reside in android.graphic.Point, not org.opencv.core.Point

for int version use cv::boundingRect(points);

note that these pivot points are chose according to the sample image.

Tone is a color term commonly used by painters. tone a bitmap with specified color, it's like mixing the color pixel by pixel, the color resulting in

the current image

* @brief open face or feature detector from its XML file * @param cascade out * @param filename in: basename.ext of cascade * @param datadir in */

Close the given closeable object (Stream) in a safe way: check if it is null and catch-log exception thrown. @param closeable the closable object to

readonly access to some private vars