Clip a full color (RGB) or multiband image

Summary

You need to clip each band by first converting the image to a grid, clipping the individual grids, and the converting them back to an image.The example below uses an RGB (red-gree-blue) image. For images with more than three bands, such as Landsat TM 7-band images, you can use the same method for all the bands.

Procedure

1. Convert image to a grid:
   
   

   Code:
   Arc: IMAGEGRID img.tif img  

   
   In this example, the img.tif file is converted to the img grid stack, which contains three grids: imgc1, imgc2, and imgc3.
   
   
2. Clip the individual grids:
   
   

   Code:
   Arc: GRID
          Grid: GRIDCLIP imgc1 imgclipc1 COVER clipcov
          Grid: GRIDCLIP imgc2 imgclipc2 COVER clipcov
          Grid: GRIDCLIP imgc3 imgclipc3 COVER clipcov  

   
   You can use any clipping procedure here, such as Arc GRIDCLIP, GRID SETMASK, or GRID CON expressions.
   
   
3. Create a new stack of the cliped grids:
   
   

   Code:
   Grid: MAKESTACK imgclip LIST imgclipc1 imgclipc2 imgclipc3 
   Grid: q

   
   
4. Convert the new stack to an image:
   
   

   Code:
   Arc: GRIDIMAGE imgclip # imgclip.tif tiff