effect - ImageMagick Image Effects Methods
Image * AddNoiseImage( const Image *image, const NoiseType noise_type, ExceptionInfo *exception );
Image * BlurImage( const Image *image, const double radius, const double sigma, ExceptionInfo *exception );
Image * DespeckleImage( const Image *image, ExceptionInfo *exception );
Image * EdgeImage( const Image *image, const double radius, ExceptionInfo *exception );
Image * EmbossImage( const Image *image, const double radius, const double sigma, ExceptionInfo *exception );
Image * EnhanceImage( const Image *image, ExceptionInfo *exception );
Image * GaussianBlurImage( const Image *image, const double radius, const double sigma, ExceptionInfo *exception );
Image * MedianFilterImage( const Image *image, const double radius, ExceptionInfo *exception );
Image * MotionBlurImage( const Image *image, const double radius, const double sigma, const double angle, ExceptionInfo *exception );
Image * ReduceNoiseImage( const Image *image, const double radius, ExceptionInfo *exception );
Image * ShadeImage( const Image *image, const unsigned int gray, double azimuth, double elevation, ExceptionInfo *exception );
Image * SharpenImage( const Image *image, const double radius, const double sigma, ExceptionInfo *exception );
Image * SpreadImage( const Image *image, const unsigned int radius, ExceptionInfo *exception );
unsigned int ThresholdImage( Image *image, const char *threshold );
Image * UnsharpMaskImage( const Image *image, const double radius, const double sigma, const double amount, const double threshold, ExceptionInfo *exception );
AddNoiseImage() adds random noise to the image.
The format of the AddNoiseImage method is:
Image *AddNoiseImage ( const Image *image, const NoiseType noise_type, ExceptionInfo *exception );
A description of each parameter follows:
BlurImage() blurs an image. We convolve the image with a Gaussian operator of the given radius and standard deviation ( sigma ) . For reasonable results, the radius should be larger than sigma. Use a radius of 0 and BlurImage ( ) selects a suitable radius for you.
The format of the BlurImage method is:
Image *BlurImage ( const Image *image, const double radius, const double sigma, ExceptionInfo *exception );
A description of each parameter follows:
Despeckle()
reduces the speckle noise in an image while perserving the edges of the original image.
The format of the DespeckleImage method is:
Image *DespeckleImage ( const Image *image, ExceptionInfo *exception );
A description of each parameter follows:
EdgeImage() finds edges in an image. Radius defines the radius of the convolution filter. Use a radius of 0 and Edge ( ) selects a suitable radius for you.
The format of the EdgeImage method is:
Image *EdgeImage ( const Image *image, const double radius, ExceptionInfo *exception );
A description of each parameter follows:
EmbossImage() returns a grayscale image with a three-dimensional effect. We convolve the image with a Gaussian operator of the given radius and standard deviation ( sigma ) . For reasonable results, radius should be larger than sigma. Use a radius of 0 and Emboss ( ) selects a suitable radius for you.
The format of the EmbossImage method is:
Image *EmbossImage ( const Image *image, const double radius, const double sigma, ExceptionInfo *exception );
A description of each parameter follows:
EnhanceImage() applies a digital filter that improves the quality of a noisy image.
The format of the EnhanceImage method is:
Image *EnhanceImage ( const Image *image, ExceptionInfo *exception );
A description of each parameter follows:
GaussianBlurImage() blurs an image. We convolve the image with a Gaussian operator of the given radius and standard deviation ( sigma ) . For reasonable results, the radius should be larger than sigma. Use a radius of 0 and GaussianBlurImage ( ) selects a suitable radius for you
The format of the BlurImage method is:
Image *GaussianBlurImage ( const Image *image, const double radius, const double sigma, ExceptionInfo *exception );
A description of each parameter follows:
MedianFilterImage() applies a digital filter that improves the quality of a noisy image. Each pixel is replaced by the median in a set of neighboring pixels as defined by radius.
The algorithm was contributed by Mike Edmonds and implements an insertion sort for selecting median color-channel values. For more on this algorithm see ``Skip Lists: A probabilistic Alternative to Balanced Trees'' by William Pugh in the June 1990 of Communications of the ACM.
The format of the MedianFilterImage method is:
Image *MedianFilterImage ( const Image *image, const double radius, ExceptionInfo *exception );
A description of each parameter follows:
MotionBlurImage() simulates motion blur. We convolve the image with a Gaussian operator of the given radius and standard deviation ( sigma ) . For reasonable results, radius should be larger than sigma. Use a radius of 0 and MotionBlurImage ( ) selects a suitable radius for you. Angle gives the angle of the blurring motion.
Andrew Protano contributed this effect.
The format of the MotionBlurImage method is:
Image *MotionBlurImage ( const Image *image, const double radius, const double sigma, const double angle, ExceptionInfo *exception );
A description of each parameter follows:
ReduceNoiseImage() smooths the contours of an image while still preserving edge information. The algorithm works by replacing each pixel with its neighbor closest in value. A neighbor is defined by radius. Use a radius of 0 and ReduceNoise ( ) selects a suitable radius for you.
The format of the ReduceNoiseImage method is:
Image *ReduceNoiseImage ( const Image *image, const double radius, ExceptionInfo *exception );
A description of each parameter follows:
ShadeImage() shines a distant light on an image to create a three-dimensional effect. You control the positioning of the light with azimuth and elevation; azimuth is measured in degrees off the x axis and elevation is measured in pixels above the Z axis.
The format of the ShadeImage method is:
Image *ShadeImage ( const Image *image, const unsigned int gray, double azimuth, double elevation, ExceptionInfo *exception );
A description of each parameter follows:
SharpenImage() sharpens an image. We convolve the image with a Gaussian operator of the given radius and standard deviation ( sigma ) . For reasonable results, radius should be larger than sigma. Use a radius of 0 and SharpenImage ( ) selects a suitable radius for you.
The format of the SharpenImage method is:
Image *SharpenImage ( const Image *image, const double radius, const double sigma, ExceptionInfo *exception );
A description of each parameter follows:
SpreadImage() is a special effects method that randomly displaces each pixel in a block defined by the radius parameter.
The format of the SpreadImage method is:
Image *SpreadImage ( const Image *image, const unsigned int radius, ExceptionInfo *exception );
A description of each parameter follows:
ThresholdImage() changes the value of individual pixels based on the intensity of each pixel compared to threshold. The result is a high-contrast, two color image.
The format of the ThresholdImage method is:
unsigned int ThresholdImage ( Image *image, const char *threshold );
A description of each parameter follows:
UnsharpMaskImage() sharpens an image. We convolve the image with a Gaussian operatorof the given radius and standard deviation ( sigma ) . For reasonable results, radius should be larger than sigma. Use a radius of 0 and UnsharpMaskImage ( ) selects a suitable radius for you.
The format of the UnsharpMaskImage method is:
Image *UnsharpMaskImage ( const Image *image, const double radius, const double sigma, const double amount, const double threshold, ExceptionInfo *exception );
A description of each parameter follows: