默认构造函数，初始化所有Boss为启用

singleton class, private constructor

Default constructor. Initializes a new pool. */

@brief Create an object which calculates quality @param ref input image to use as the source for comparison @param maxPixelValue maximum per-c

@brief Internal constructor */

internal constructor

@brief Constructor @param ref reference image, converted to internal type */

@brief Constructor */

@brief Constructor @param refImgData reference image, converted to internal type */

Constructor * @param radius the maximum distance of a neighbor */