\-gaussian-blur geometry
reduce image noise and reduce detail levels
\-geometry geometry preferred size or location of the image
+ \-grayscale method convert image to grayscale
\-identify identify the format and characteristics of the image
\-ift implements the inverse discrete Fourier transform (DFT)
\-implode amount implode image pixels about the center
\-level value adjust the level of image contrast
\-linear-stretch geometry
improve contrast by `stretching with saturation' the intensity range
+ \-magnify double the size of the image with pixel art scaling
\-median geometry apply a median filter to the image
\-mode geometry make each pixel the 'predominant color' of the neighborhood
\-modulate value vary the brightness, saturation, and hue