vis/images/

mg_scaleimage.pro

includes main-level program

result = mg_scaleimage(im, dividers=1-dimensional array, outputs=1-dimensional array)

Piecewise-linearly scale an image.

image of the same dimensions as the original and type float

im in required type=2-dimensional array

input image (single band)

dividers in required type=1-dimensional array: divider values in the scale of the input image
outputs in required type=1-dimensional array: output values corresponding to the DIVIDERS values

Try the main-level example program at the end of this file:

  IDL> .run mg_scaleimage

This example does the following scaling:

  im = mg_scaleimage(elev, dividers=[0, 1, 256], outputs=[0, 144, 256])

Here, the interval 0..1 in the input image is scaled to 0..144, and 1..256 is scaled to 144..245.

Personal library of Michael Galloy
Contact me if you have enhancement requests or bug fixes.