Reduces the speckle noise in an image while preserving the edges of the original image

$im = new Imagick('addNoiseImage.jpg');
$im->despeckleImage();
$im->writeImage('despeckleImage.jpg'); 
$im->destroy();

( No noticable effect )

Destroys the Imagick object and frees all resources associated with it.

$im = new Imagick($input);
$im->edgeImage( 0.5 );
$im->writeImage('destroy.jpg'); 
$im->destroy();

( Depreciated in favour of clear( ) )

This method displays an image on a X server.

Displays an image or image sequence on a X server.

Distorts an image using various distortion methods.

Renders the ImagickDraw object on the current image.

Enhance edges within the image with a convolution filter of the given radius.

$im = new Imagick($input);
$im->edgeImage( 0.5 );
$im->writeImage('edgeImage.jpg'); 
$im->destroy();

( Use radius 0 and it will be auto-selected. )

Returns a grayscale image with a three-dimensional effect.

$im = new Imagick($input);
$im->embossImage( 3, 0);
$im->writeImage('embossImage.jpg'); 
$im->destroy();

( 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 it will choose a suitable radius for you. )

Converts plain pixels to enciphered pixels.

$im = new Imagick($input);
$im->encipherImage(passkey.txt);
$im->writeImage('encipherImage.png'); 
$im->destroy();

( The image is not readable until it has been deciphered using decipherImage(). You need to use a image format that is not compressed on saving e.g.png )

Applies a digital filter that improves the quality of a noisy image.

$im = new Imagick($input);
$im->enhanceImage( );
$im->writeImage('enhanceImage.jpg'); 
$im->destroy();

Equalizes the image histogram.

$im = new Imagick($input);
$im->equalizeImage( );
$im->writeImage('equalizeImage.jpg'); 
$im->destroy();

Applys an arithmetic, relational, or logical expression to an image.

$im = new Imagick($input);
// Reduce the alpha by 50%
$im->evaluateImage(Imagick::EVALUATE_DIVIDE, 2, Imagick::CHANNEL_ALPHA);
$im->writeImage('evaluateImage.jpg'); 
$im->destroy();

( Use these operators to lighten or darken an image, to increase or decrease contrast in an image, or to produce the "negative" of an image. )

Exports image pixels into an array

$im = new Imagick($input);
$pixels = $im->exportImagePixels(10, 10, 2, 2, "RGB", Imagick::PIXEL_CHAR);
echo "<pre>";
print_r($pixels);
echo "</pre>";

( The map defines the ordering of the exported pixels. The size of the returned array is width * height * strlen(map). )

Comfortability method for setting image size.

$im = new Imagick($input);
$im->setImageBackgroundColor( black );
$im->extentImage( 200, 200, 0, -25);
$im->writeImage('extentImage.jpg'); 
$im->destroy();

( The method sets the image size and allows setting x,y coordinates where the new area begins. )