images/

vis_scaleimage.pro

includes main-level program

result = vis_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 vis_scaleimage

This example does the following scaling:

  im = vis_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.