Image filtering, spatial domain

DESPIKE

Perform adaptive low-pass filtering to remove image noise (C)

DESWATH

Remove low-frequency noise, such as TM periodic stripping (B)

EDGEX

Extract image edges using gradient filtering (B)

FILTER

Apply low- or high-pass, or median boxcar, filter to image (B)

LOWCAL

Replace each pixel by result of operation on neighborhood (B)

SMOOTH

Smooth image by replacing flagged pixels by neighbors (B)

TEXTURE

Calculate any of 8 local texture measures for an image (B)

TOPO

Compute slope, aspect, or contours of an image (B)

UHIST

Create a gradient/uniformity image and its histogram (C)

WINDOP

Subsample image using neighborhood mean, max, or min (B)