NAME

zoom - Methods to Resize an Image

SYNOPSIS

Image * MagnifyImage( image, ExceptionInfo *exception );

Image * MinifyImage( Image *image, ExceptionInfo *exception );

Image * ResizeImage( Image *image, const unsigned int columns, const unsigned int rows, const FilterType filter, const double blur, ExceptionInfo *exception );

Image * SampleImage( Image *image, const unsigned int columns, const unsigned int rows, ExceptionInfo *exception );

Image * ScaleImage( Image *image, const unsigned int columns, const unsigned int rows, ExceptionInfo *exception );

FUNCTION DESCRIPTIONS

MagnifyImage

MagnifyImage ( ) is a convenience method that scales an image proportionallyto twice its size. If a NULL image is returned, check the exception memberof image to determine why the image failed to magnify.;

The format of the MagnifyImage method is:

Image *MagnifyImage ( image, ExceptionInfo *exception );

A description of each parameter follows:

image:
The image.

exception:
Return any errors or warnings in this structure.

MinifyImage

MinifyImage ( ) is a convenience method that scales an image proportionallyto half its size. If a NULL image is returned, check the exception memberof image to determine why the image failed to minify.;

The format of the MinifyImage method is:

Image *MinifyImage ( Image *image, ExceptionInfo *exception );

A description of each parameter follows:

image:
The image.

exception:
Return any errors or warnings in this structure.

ResizeImage

ResizeImage ( ) scales an image to the desired dimensions with one of thesefilters:; 
  Bessel   Blackman   Box
  Catrom   Cubic      Gaussian
  Hanning  Hermite    Lanczos
  Mitchell Point      Quandratic
  Sinc     Triangle

If a NULL image is returned, check exception to determine why the image failed to scale.

The format of the ResizeImage method is:

Image *ResizeImage ( Image *image, const unsigned int columns, const unsigned int rows, const FilterType filter, const double blur, ExceptionInfo *exception );

A description of each parameter follows:

image:
The image.

columns:
The number of columns in the scaled image.

rows:
The number of rows in the scaled image.

filter:
Image filter to use.

blur:
The blur factor where > 1 is blurry, < 1 is sharp.

exception:
Return any errors or warnings in this structure.

SampleImage

SampleImage ( ) scales an image to the desired dimensions with pixelsampling. Unlike other scaling methods, this method does not introduceany additional color into the scaled image. If a NULL image isreturned, check exception to determine why the image failed to scale.;

The format of the SampleImage method is:

Image *SampleImage ( Image *image, const unsigned int columns, const unsigned int rows, ExceptionInfo *exception );

A description of each parameter follows:

image:
The image.

columns:
The number of columns in the sampled image.

rows:
The number of rows in the sampled image.

exception:
Return any errors or warnings in this structure.

ScaleImage

ScaleImage ( ) changes the size of an image to the given dimensions. Ifa NULL image is returned, check exception to determine why the image failedto scale.;

The format of the ScaleImage method is:

Image *ScaleImage ( Image *image, const unsigned int columns, const unsigned int rows, ExceptionInfo *exception );

A description of each parameter follows:

image:
The image.

columns:
The number of columns in the scaled image.

rows:
The number of rows in the scaled image.

exception:
Return any errors or warnings in this structure.