Contrast adjustment and radiometric remapping

CONSTRETCH

Perform local range contrast stretch on an image (B)

FASTMAP

Replace a specified grey level value by a new value (C)

FRACTVEG

Compute fractional vegetation index from NDVI image (P)

GAUSTRAN

Apply a Gaussian transfer function to an image (B)

HISTEQ

Equalizate histograms for each detector in a band (B)

MAP

Perform piecewise-linear intensity transformation on image (B)

MAPFILE

Create piecewise-linear transformation to match histograms (B)

MERGEFOUR

Seamlessly merge a two-by-two array of overlapping images (P)

MSSCOLOR

Create simulated natural color image from MSS image (B)

PIXCOUNT

Compile histogram and pixel statistics for each image band (B)

RADIOM2

Apply radiometric look-up tables to BYTE image (B)

REDIST

Remap grey level values to give a uniform histogram (C)

REDIST2

Remap non-masked grey-level values to uniform histogram (C)

RENUMBER

Remap selected grey level values to new values (B)

SCALE

Linearly scale radiometric values with optional clipping (C)

STRETCH

Generate lookup table for specified contrast stretch mode (C)

UNILUT

Generate or edit a display look-up table (C)