Means limited to mask-style operations since they are based on continuousįloating-point mathematics rather than simple boolean operations. Is convenient to describe the operators in terms of "shapes" they are by no Order to make the description of the operators easier to understand. Theĭescription of the composition operators use this concept of image "shape" in
Transparent in order to provide antialiasing (visually smooth edges). Pixels on the boundary of the shape may be between opaque and Pixels within the shape to be opaque, with pixels outside the shape set as Visual "mask" the rectangular image may be given a "shape" by treating theĪlpha channel as a cookie-cutter for the image. All image rows are ofĮqual length, as are all image columns. Pixel color is entirely absent (pixel color is ignored).īy definition, raster images have a rectangular shape. TheĬolor of an opaque pixel is fully visible while the color of a transparent If the image matteĬhannel is disabled, then all pixels in the image are treated as opaque. Transparent, which may be used to determine the influence of the pixelĬolor when compositing the pixel with another image pixel. Each image pixel may also optionally (if the image matte channel isĮnabled) have an associated level of opacity, ranging from opaque to Value which may be stored, per pixel, in the red, green, or blue channels of Theīuild-dependent value QuantumRange is the maximum integral Each image pixel is representedīy red, green, and blue levels (which are equal for a gray pixel). Specific to a particular build configuration. The description to be more precise, while avoiding constant values which are The description of composition uses abstract terminology in order to allow For theĬommand Line API it is typically set using the -compose setting option.
Two images should be merged together in various image operations. This page descibed the Image composition methods that is used to define how
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