There are 330 functions listed here

A
Adaptive blur image - Adds an adaptive blur filter to image.
Adaptive resize image - Adaptively resize image with data-dependent triangulation.
Adaptive threshold image - Selects an individual threshold for each pixel based on the range of intensity values in its local neighborhood.
Adaptively sharpen image - Adaptively sharpen the image by sharpening more intensely near image edges and less intensely far from edges.
Add image - Adds new image to Imagick object from the current position of the source object.
Add noise image - Adds random noise to the image.
Affine transform image - Transforms an image as dictated by the affine matrix.
Animate images - This method animates the image onto a local or remote X server.
Annotate image - Annotates an image with text.
Append images - Append a set of images into one larger image.
Average images - Average a set of images.

B
Black threshold image - Forces all pixels below the threshold into black while leaving all pixels above the threshold unchanged.
Blur image - Adds blur filter to image.
Border image - Surrounds the image with a border of the color defined by the bordercolor ImagickPixel object.

C
Charcoal image - Simulates a charcoal drawing.
Chop image - Removes a region of an image and collapses the image to occupy the removed portion.
Clear - Clears all resources associated to Imagick object
Clip image - Clips along the first path from the 8BIM profile, if present.
Clip path image - Clips along the named paths from the 8BIM profile, if present.
Clone - Makes an exact copy of the Imagick object.
Clut image - Replaces colors in the image from a color lookup table.
Coalesce images - Composites a set of images while respecting any page offsets and disposal methods.
Color floodfill image - Changes the color value of any pixel that matches target and is an immediate neighbor.
Colorize image - Blends the fill color with each pixel in the image.
Combine images - Combines one or more images into a single image.
Comment image - Adds a comment to your image.
Compare Image channels - Compares one or more images and returns the difference image.
Compare image layers - Compares each image with the next in a sequence and returns the maximum bounding region of any pixel differences it discovers.
Compare images - Returns an array containing a reconstructed image and the difference between images.
Composite image - Composite one image onto another at the specified offset.
Construct - Creates an Imagick instance for a specified image or set of images.
Contrast image - Enhances the intensity differences between the lighter and darker elements of the image.
Contrast stretch image - Enhances the contrast of a color image by adjusting the pixels color to span the entire range of colors available.
Convolve image - Applies a custom convolution kernel to the image.
Crop image - Extracts a region of the image.
Crop thumbnail image - Creates a fixed size thumbnail by first scaling the image up or down and cropping a specified area from the center.
Current - Returns reference to the current imagick object with image pointer at the correct sequence.
Cycle colormap image - Displaces an image's colormap by a given number of positions.

D
Decipher image - Deciphers image that has been enciphered before.
Deconstruct images - Compares each image with the next in a sequence and returns the maximum bounding region of any pixel differences it discovers.
Delete image artifact - Deletes an artifact associated with the image.
Deskew image - This method can be used to remove skew from for example scanned images where the paper was not properly placed on the scanning surface.
Despeckle image - Reduces the speckle noise in an image while preserving the edges of the original image
Destroy - Destroys the Imagick object and frees all resources associated with it.
Display image - This method displays an image on a X server.
Display images - Displays an image or image sequence on a X server.
Distort image - Distorts an image using various distortion methods.
Draw image - Renders the ImagickDraw object on the current image.

E
Edge image - Enhance edges within the image with a convolution filter of the given radius.
Emboss image - Returns a grayscale image with a three-dimensional effect.
Encipher image - Converts plain pixels to enciphered pixels.
Enhance image - Applies a digital filter that improves the quality of a noisy image.
Equalize image - Equalizes the image histogram.
Evaluate image - Applys an arithmetic, relational, or logical expression to an image.
Export image pixels - Exports image pixels into an array
Extent image - Comfortability method for setting image size.

F
Flatten images - Merges a sequence of images.
Flip image - Creates a vertical mirror image by reflecting the pixels around the central x-axis.
Flood fill paint - Changes the color value of any pixel that matches target and is an immediate neighbor.
Flop image - Creates a horizontal mirror image by reflecting the pixels around the central y-axis.
Frame image - Adds a simulated three-dimensional border around the image.
Function image - Applies an arithmetic, relational, or logical expression to an image.

f
fx image - Evaluate expression for each pixel in the image.

G
Gamma image - Gamma-corrects an image.
Gaussian blur image - Blurs an image.
Get color as string - Returns the color of the ImagickPixel object as a string.
Get color count - Returns the color count associated with this color.
Get color value - Retrieves the value of the color channel specified, as a floating-point number between 0 and 1.
Get colorspace - Gets the global colorspace value.
Get compression - Gets the object compression type.
Get compression quality - Gets the object compression quality.
Get copyright - Returns the ImageMagick API copyright as a string.
Get filename - Returns the filename associated with an image sequence.
Get font - Returns the objects font property.
Get format - Returns the format of the Imagick object.
Get gravity - Gets the global gravity property for the Imagick object.
Get home URL - Returns the ImageMagick home URL.
Get HSL - Returns the normalized HSL color described by the ImagickPixel object, with each of the three values as floating point numbers between 0.0 and 1.0.
Get image - Returns a new Imagick object with the current image sequence.
Get image alpha channel - Gets the image alpha channel value.
Get image artifact - Gets an artifact associated with the image.
Get image background color - Returns the image background color.
Get image blob - Implements direct to memory image formats.
Get image blue primary - Returns the chromaticity blue primary point for the image.
Get image border color - Returns the image border color.
Get image channel depth - Gets the depth for a particular image channel.
Get image channel distortion - Compares one or more image channels of an image to a reconstructed image and returns the specified distortion metric.
Get image channel distortions - Compares one or more image channels of an image to a reconstructed image and returns the specified distortion metrics
Get image channel extrema - Gets the extrema for one or more image channels.
Get image channel kurtosis - Get the kurtosis and skewness of a specific channel
Get image channel mean - Gets the mean and standard deviation of one or more image channels.
Get image channel range - Gets the range for one or more image channels.
Get image channel statistics - Returns statistics for each channel in the image.
Get image clip mask - Returns the image clip mask.
Get image color map color - Returns the color of the specified colormap index.
Get image colors - Gets the number of unique colors in the image.
Get image colorspace - Gets the image colorspace.
Get image compose - Returns the composite operator associated with the image.
Get image compression - Gets the current image's compression type.
Get image delay - Gets the image delay.
Get image depth - Gets the image depth.
Get image dispose - Gets the image disposal method.
Get image distortion - Compares an image to a reconstructed image and returns the specified distortion metric.
Get image extrema - Gets the extrema for the image.
Get image filename -
Get image format - Returns the format of a particular image in a sequence.
Get image gamma - Gets the image gamma.
Get image geometry - Returns the width and height as an associative array.
Get image gravity - Gets the current gravity value of the image.
Get image green primary - Returns the chromaticity green primary point. Returns an array with the keys "x" and "y".
Get image height - Returns the image height.
Get image histogram - Returns the image histogram as an array of ImagickPixel objects.
Get image index - Returns the index of the current active image within the Imagick object.
Get image interlace scheme - Gets the image interlace scheme.
Get image interpolate method - Returns the interpolation method for the specified image.
Get image iterations - Gets the image iterations.
Get image length - Returns the image length in bytes.
Get image magick license - Returns a string containing the ImageMagick license
Get image matte - Returns TRUE if the image has a matte channel otherwise false.
Get image matte color - Returns the image matte color.
Get image orientation - Gets the image orientation.
Get image page - Returns the page geometry associated with the image
Get image pixel color - Returns the color of the specified pixel.
Get image profile - Returns the named image profile.
Get image profiles - Returns all associated profiles that match the pattern.
Get image properties - Returns all associated properties that match the pattern.
Get image property - Returns the named image property.
Get image red primary - Returns the chromaticity red primary point as an array with the keys "x" and "y".
Get image region - Extracts a region of the image and returns it as a new Imagick object.
Get image rendering intent - Gets the image rendering intent.
Get image resolution - Gets the image X and Y resolution.
Get image scene - Gets the image scene.
Get image signature - Generates an SHA-256 message digest for the image pixel stream.
Get image size - Returns the image length in bytes.
Get image ticks per second - Gets the image ticks-per-second.
Get image total ink density - Gets the image total ink density.
Get image type - Gets the potential image type.
Get image units - Gets the image units of resolution.
Get image virtual pixel method - Returns the virtual pixel method for the specified image.
Get image white point - Returns the chromaticity white point as an associative array with the keys "x" and "y".
Get image width - Returns the image width.
Get images blob - Implements direct to memory image formats.
Get interlace scheme - Gets the object interlace scheme.
Get iterator index - Returns the index of the current active image within the Imagick object.
Get number images - Returns the number of images associated with Imagick object.
Get option - Returns a value associated within the object for the specified key.
Get package name - Returns the ImageMagick package name.
Get page - Returns the page geometry associated with the Imagick object
Get pixel iterator - Returns a MagickPixelIterator.
Get pixel region iterator - Get an ImagickPixelIterator for an image section.
Get point size - Returns the objects point size property.
Get quantum depth - Returns the Imagick quantum depth as a string.
Get quantum range - Returns the Imagick quantum range as a string.
Get release date - Returns the ImageMagick release date as a string.
Get resource - Returns the specified resource's memory usage in megabytes.
Get resource limit - Returns the specified resource limit in megabytes.
Get sampling factors - Gets the horizontal and vertical sampling factor.
Get size - Returns the size associated with the Imagick object
Get size offset - Returns the size offset associated with the Imagick object.
Get version - Returns the ImageMagick API version as a string and as a number.

H
Hald clutImage - Replaces colors in the image using a Hald lookup table.
Has next image - Checks if the object has more images
Has previous image - Checks if the object has a previous image

I
Identify image - Identifies an image and returns the attributes.
Imagick version - Imagick version
Imagick version - Imagick version
Implode image - Creates a new image that is a copy of an existing one with the image pixels "imploded" by the specified percentage.
Import image pixels - Imports pixels from an array into an image.
Is similar - Checks the distance between the color described by this ImagickPixel object

L
Label image - Adds a label to an image.

l
levelImage - Adjusts the levels of an image by scaling the colors falling between specified white and black points to the full available quantum range.

L
Linear stretchImage - Stretches with saturation the image intensity.
Liquid rescale image - This method scales the images using liquid rescaling method.

M
Magnify image - Is a convenience method that scales an image proportionally to twice its original size.
Map image - Replaces the colors of an image with the closest color from a reference image.
Matte flood fill image - Changes the transparency value of any pixel that matches target and is an immediate neighbor.
Median filter image - Applies a digital filter that improves the quality of a noisy image.
Merge image layers - Merges image layers into one.
Minify image - Is a convenience method that scales an image proportionally to one-half its original size

m
modulateImage - Lets you control the brightness, saturation, and hue of an image.

M
Montage image - Creates a composite image by combining several separate images.
Morph images - Method morphs a set of images.
Mosaic images - Inlays an image sequence to form a single coherent picture.
Motion blur image - Simulates motion blur.

N
Negate image - Negates the colors in the reference image.
New image - Creates a new image and associates ImagickPixel value as background color
Newpseudo image - Creates a new image using ImageMagick pseudo-formats.
Next image - Associates the next image in the image list with an Imagick object.
Normalize image - Enhances the contrast of a color image by adjusting the pixels color to span the entire range of colors available.

O
Oil paint image - Applies a special effect filter that simulates an oil painting.
Opaque paint image - Changes any pixel that matches color with the color defined by fill.
Optimize image layers - Compares each image the GIF disposed forms of the previous image in the sequence.
Ordered posterize image - Performs an ordered dither based on a number of pre-defined dithering threshold maps.

P
Paint floodfill image - Changes the color value of any pixel that matches target and is an immediate neighbor.
Paint opaque image - Changes any pixel that matches color with the color defined by fill.
Paint transparent image - Changes any pixel that matches color with the color defined by fill.
Ping image - This method can be used to query image width, height, size, and format without reading the whole image in to memory.
Ping image blob - This method can be used to query image width, height, size, and format without reading the whole image to memory.
Ping image file - This method can be used to query image width, height, size, and format without reading the whole image to memory.
Polaroid image - Simulates a Polaroid picture.
Posterize image - Reduces the image to a limited number of color level.
Preview images - Tiles 9 thumbnails of the specified image with an image processing operation applied at varying strengths.
Previous image - Assocates the previous image in an image list with the Imagick object.
Profile image - Adds or removes a ICC, IPTC, or generic profile from an image.

Q
Quantize image - Analyzes the colors within a reference image
Quantize images - Analyzes the colors within a sequence of images
Query font metrics - Returns a multi-dimensional array representing the font metrics.
Query fonts - Returns the configured fonts.
Query formats - Returns formats supported by Imagick.

R
Radial blur image - Radial blurs an image.
Raise image - Creates a simulated three-dimensional button-like effect by lightening and darkening the edges of the image.
Random threshold image - Changes the value of individual pixels based on the intensity of each pixel compared to threshold.
Read image - Reads image from filename.
Read image blob - Reads image from a binary string.
Read image file - Reads image from open filehandle
Recolor image - Translate, scale, shear, or rotate image colors.
Reduce noise image - Smooths the contours of an image while still preserving edge information.
Remap image - Replaces colors an image with those defined by replacement.
Remove image - Removes an image from the image list.
Remove image profile - Removes the named image profile and returns it.
Render - Renders all preceding drawing commands.
Resample image - Resample image to desired resolution.
Reset image page - The page definition as a string.
Resize image - Scales an image to the desired dimensions with a filter.
Roll image - Offsets an image as defined by x and y.
Rotate image - Rotates an image the specified number of degrees.
Round corners - Rounds image corners.

S
Sample image - Scales an image to the desired dimensions with pixel sampling.
Scale image - Scales the size of an image to the given dimensions.
Segment image - Analyses the image and identifies units that are simila
Separate image channel - Separates a channel from the image and returns a grayscale image.
Sepia tone image - Applies a special effect to the image, similar to the effect achieved in a photo darkroom by sepia toning.
Set background color - Sets the object's default background color.
Set color - Sets the color described by the ImagickPixel object
Set colorspace - Sets the global colorspace value for the object.
Set compression quality - Sets the object's default compression type.
Set filename - Sets the filename before you read or write an image file.
Set first iterator - Sets the Imagick iterator to the first image.
Set font - Sets object's font property.
Set format - Sets the format of the Imagick object.
Set gravity - Sets the global gravity property for the Imagick object.
Set image - Replaces the current image sequence with the image from replace object.
Set image alpha channel - Activate or deactivate image alpha channel.
Set image artifact - Associates an artifact with the image.
Set image background color - Sets the image background color.
Set image bias - Sets the image bias for any method that convolves an image (e.g. ConvolveImage()).
Set image blue primary - Sets the image chromaticity blue primary point.
Set image border color - Sets the image border color.
Set image channel depth - Sets the depth of a particular image channel.
Set image clip mask - Sets image clip mask from another Imagick object.
Set image colormap color - Sets the color of the specified colormap index.
Set image colorspace - Sets the image colorspace.
Set image compose - Sets the image composite operator.
Set image compression - Sets the image compression
Set image compression quality - Sets the image compression quality.
Set image delay - Sets the image delay.
Set image depth - Sets the image depth.
Set image dispose - Sets the image disposal method.
Set image extent - Sets the image size (i.e. columns & rows).
Set image filename - Sets the filename of a particular image in a sequence.
Set image format - Sets the format of a particular image in a sequence.
Set image gamma - Sets the image gamma.
Set image gravity - Sets the gravity property for the current image.
Set image green primary - Sets the image chromaticity green primary point.
Set image index - Set the iterator to the position in the image list specified with the index parameter.
Set image interlace scheme - Sets the image compression.
Set image interpolate method - Sets the image interpolate pixel method.
Set image matte - Sets the image matte channel.
Set image matte color - Sets the image matte color.
Set image opacity - Sets the image to the specified opacity level.
Set image orientation - Sets the image orientation.
Set image page - Sets the page geometry of the image.
Set image profile - Adds a named profile to the Imagick object.
Set image property - Sets a named property to the image.
Set image red primary - Sets the image chromaticity red primary point.
Set image rendering intent - Sets the image rendering intent.
Set image resolution - Sets the image resolution.
Set image scene - Sets the image scene.
Set image ticks per second - Sets the image ticks-per-second.
Set image type - Sets the image type.
Set image units - Sets the image units of resolution.
Set image virtual pixel method - Sets the image virtual pixel method.
Set image white point - Sets the image chromaticity white point.
Set interlace scheme - Sets the image compression.
Set iterator index - Set the iterator to the position in the image list specified with the index parameter.
Set last iterator - Sets the Imagick iterator to the last image.
Set option - Associates one or more options with the wand.
Set page - Sets the page geometry of the Imagick object.
Set point size - Sets object's point size property.
Set resolution - Sets the image resolution.
Set resource limit - Sets the limit for a particular resource in megabytes.
Set sampling factors - Sets the image sampling factors.
Set size - Sets the size of the Imagick object.
Set size offset - Sets the size and offset of the Imagick object.
Set type -
SetImageIterations - Sets the image iterations.
Shade image - Shines a distant light on an image to create a three-dimensional effect.

s
shadowImage - Simulates an image shadow.

S
Sharpen image - Sharpens an image.
Shave image - Shaves pixels from the image edges.
Shear image - Slides one edge of an image along the X or Y axis, creating a parallelogram.

s
sigmoidalContrastImage - Adjusts the contrast of an image with a non-linear sigmoidal contrast algorithm.

S
Sketch image - Simulates a pencil sketch.

s
solarizeImage - Applies a special effect to the image, similar to the effect achieved in a photo darkroom by selectively exposing areas of photo sensitive paper to light.

S
Sparse color image - Interpolates colors
Splice image - Splices a solid color into the image
Spread image - Special effects method that randomly displaces each pixel in a block defined by the radius parameter.
Stegano image - Hides a digital watermark within the image.
Stereo image - Composites two images
Strip image - Strips an image of all profiles and comments.
Swirl image - Swirls the pixels about the center of the image.

T
Texture image - Repeatedly tiles the texture image across and down the image canvas.
Threshold image - Changes the value of individual pixels based on the intensity of each pixel compared to threshold.
Thumbnail image - Changes the size of an image
Tint image - Applies a color vector to each pixel in the image.
Transform image - A convenience method for setting crop size and the image geometry from strings.
Transparent paint image - Paints pixels matching the target color transparent.
Transpose image - Creates a vertical mirror image by reflecting the pixels around the central x-axis while rotating them 90-degrees.
Transverse image - Creates a horizontal mirror image by reflecting the pixels around the central y-axis while rotating them 270-degrees.
Trim image - Remove edges that are the background color from the image.

U
Unique image colors - Discards all but one of any pixel color.
Unsharp mask image - Sharpens an image.

V
Valid - Checks if the current item is valid.
Vignette image - Softens the edges of the image in vignette style.

W
Wave image - Applies a wave filter to the image.
White threshold image - Force all pixels above the threshold into white.
Write image file - Writes an image to a filehandle
Write images - Writes an image or image sequence.
Write images file - Writes all image frames into an open filehandle.

w
writeImage - Writes an image to the specified filename.

These examples were generated using:
Imagick API version 1608
ImageMagick 6.4.8 2010-10-13 Q16

( More Imagick information on the php website )