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Arithmetic: Add two images or an image and a constant.
BandCombine: Combine three SingleBand images to create a TripleBand image.
BandExtract: Generate a SingleBand image from a color image. Typical use is to generate a gray-scale version of a color image.
BandSelect: Pass one band of a TripleBand image and discard the other two bands.
Blend: blend two images using an optional alpha plane.
Compare: Compare two images based on conditional tests, generating a bitmap result.
Constrain: Map image data into a specific integer range by either clipping or scaling.
ConvertFromIndex: Convert pixel values indexing a color map into their corresponding intensity values.
ConvertFromRGB: Convert an image from RGB color space to some other color space.
ConvertToIndex: Convert intensity values into color-map indexes which store the mapped intensity values.
ConvertToRGB: Convert an image in a non-RGB color space to RGB. (We used this in our sample program.)
Convolve: Perform an image convolution using a user-supplied kernel. Can be used to implement effects such as blurring, embossing and sharpening.
Dither: Dither an image to some number of levels less than the input image.
Export Elements: Send data out of a photoflo to either a client or server resource. The most commonly used export element, ExportDrawable, sends color-map index data to an X window for display.
Geometry: Scale, rotate, crop, translate or perform a combination of these options.
Logical: Perform a logical operation on two images or an image and a constant. Logical operations include OR, AND, NOT, etc. The logical operations are the same as X's GC functions. For more information, refer to XSetFunction.
MatchHistogram: Perform histogram equalization on an image. The characteristic shape of the result can be specified by a technique.
Math: Perform a math operation (e.g., square, log) on an image.
PasteUp: Arrange (e.g., tile) n source images to generate the resulting image.
Point: The most versatile process element. Can perform an arbitrary mapping of image pixels using a LUT supplied by the client.
Unconstrain: Remove the levels attribute of an image.