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F

Feather : Fades an area over a specified number of pixels.
Fill/Flood Fill : These are techniques for coloring areas bounded by line edges. The algorithms that fill interior-defined regions (the largest connected region of pixels whose values are the same as a given starting pixel) are called flood fill algorithms.
Filter : 1) An optical device that selectively attenuates the intensity of light passing through it according to the light's properties. Common filters attenuate light according to either wavelength or polarization state.
2) An algorithm that selectively modifies the intensity or color of image data according to the image's properties. 3) An element (software or hardware) which takes in a stream of data and produces a stream of results, on average one output for each input.
Foreground Color : The color that is applied when a painting tool is used, type is created, or the stroke command is applied.
Four-color Process : The printing process that reproduces colors by combining, cyan (C), magenta (M), yellow (Y), and black (K) inks. This process is alternately called four-color printing, CMYK printing, or process printing.
FPS : Frames Per Second. The rate at which animations are displayed.
Frame : A still two-dimensional image. Often a frame is a raster image as used in the frame buffer of a graphics display system. In computer animation frames per second is a measurement of the number of still frames displayed in one second to give the impression of a moving image.
Frame Rate : The frame rate of a video source is determined by the speed at which it completes the rendering of a new image. This is limited by both the speed at which image data can be created and the rate at which video images can be presented on a display. For example the NTSC system redraws at 30Hz, PAL is 25Hz and computer displays are now usually 72-75Hz.
Frame Size : A term used to refer to the dimensions of the array of pixels forming a frame of an animation, or alternatively the memory requirement and hence indirectly the resolution and dimensions.