Lines Matching refs:Contrast
205 % BrightnessContrastImage() changes the brightness and/or contrast of an
206 % image. It converts the brightness and contrast parameters into slope and
212 % const double brightness,const double contrast,ExceptionInfo *exception)
220 % o contrast: the contrast percent (-100 .. 100).
226 const double brightness,const double contrast,ExceptionInfo *exception)
246 alpha=contrast;
828 % image contrast otherwise the contrast is reduced.
839 % o sharpen: Increase or decrease image contrast.
845 static void Contrast(const int sign,double *red,double *green,double *blue)
853 Enhance contrast: dark color become darker, light color become lighter.
875 #define ContrastImageTag "Contrast/Image"
907 Contrast enhance colormap.
919 Contrast(sign,&red,&green,&blue);
926 Contrast enhance image.
961 Contrast(sign,&red,&green,&blue);
999 % to improve the contrast in an image by 'stretching' the range of intensity
1183 Stretch-contrast colormap.
1214 Stretch-contrast image.
2531 % It can be used to de-contrast a greyscale image to the exact levels
3630 % The NormalizeImage() method enhances the contrast of a color image by
3669 % SigmoidalContrastImage() adjusts the contrast of an image with a non-linear
3670 % sigmoidal contrast algorithm. Increase the contrast of the image using a
3672 % Contrast indicates how much to increase the contrast (0 is none; 3 is
3675 % sharpen to MagickTrue to increase the image contrast otherwise the contrast
3688 % o sharpen: Increase or decrease image contrast.
3690 % o contrast: strength of the contrast, the larger the number the more
3736 zero. This is fixed below by exiting immediately when contrast is small,
3748 Inverse of ScaledSigmoidal, used for +sigmoidal-contrast. Because b
3784 const MagickBooleanType sharpen,const double contrast,const double midpoint,
3789 ScaledSigmoidal(contrast,QuantumScale*midpoint,QuantumScale*(x))) )
3791 InverseScaledSigmoidal(contrast,QuantumScale*midpoint,QuantumScale*(x))) )
3813 Side effect: may clamp values unless contrast<MagickEpsilon, in which
3816 if (contrast < MagickEpsilon)
3819 Sigmoidal-contrast enhance colormap.
3860 Sigmoidal-contrast enhance image.
