20         _sigma( sigma_ )  in adaptiveBlurImage()
25   image_.adaptiveBlur( _radius, _sigma );  in operator ()()
116         _sigma( sigma_ )  in blurImage()
121   image_.blur( _radius, _sigma );  in operator ()()
147         _sigma( sigma_ )  in charcoalImage()
152   image_.charcoal( _radius, _sigma );  in operator ()()
355     _sigma( 0.5 )  in embossImage()
360     _sigma( sigma_ )  in embossImage()
365   image_.emboss( _radius, _sigma );  in operator ()()
578     _sigma( sigma_ )  in gaussianBlurImage()
583   image_.gaussianBlur( _width, _sigma );  in operator ()()
970     _sigma( sigma_ ),  in shadowImage()
977   image_.shadow( _percent_opacity, _sigma, _x, _y );  in operator ()()
983     _sigma( sigma_ )  in sharpenImage()
988   image_.sharpen( _radius, _sigma );  in operator ()()