Untitled Document

12/04/2008

K-Ratio Notes (see K-Ratio Images)

See:

article on Log-3-Band color scale.
figure of the color scale

The Log 3-Band color scale is applicable to any real-valued images whose pixels range (mostly) from 0.0 to 1.0. Use Info --> Sizes & Limits to see the range of pixel values in your images.

Applying the Color scale to K-RatioImages.

(This documentation is old - parts may be out of date. 12/08)

Load quantitated maps or K-ratio images (useful values range from 0 to 1.0):
'TOOLS --> K Ratio'
Select Raney-fini.txt (Raney-commented-fini.txt will also work)
- This file is in the Kratio-example folder, available for download at http://www.nist.gov/lispix/Lx04Doc/dnld/demo-images/Kratio-example
- The Raney-fini.xls file is an Excel file with comments. For use with Lispix, it is (already) saved as a text tab delimited file: Raney-fini.txt. It may be easier to copy the .xls file and edit it to match your data, than to use the .txt file.
See the progress bar. Windows will display.
Arrange all of the images so you can see them.
- <shift> 'Resize'
- 'Tile' (not with shift key)
Apply the Log-3Band color scale
- Periodic Table Tool / FINI / Display Using Log-3-Band Scale (Hold down shift key to do all images at once.)
Draw the color scale in an image.
- Click on one of the k-ratio images (NOT one of the colored images).
- 'select / draw rectangle' Draw the outline where the scale will go.
- 'edit / log ramp', type in .001 1.0 for the full ramp range
- To tile the images so that they are arranged nicely:
  - 'Shift / Resize' to make sure images are not cropped by their windows being too small.
- If the image files have a consistent prefix, rename the total window to match.
  - 'Rename'
  - Move cursor to left to avoid retyping image name.
- Adjust the size of the background window so that the number of windows desired on a row just fits across the background window.
  - 'Windows / sort up' or down.
  - 'Tile'.
- To make a horizontal color scale:
  - Click on one of the k-ratio images not one of the colored images.
  - The k-ratio images are floating point (values from 0 to 1.0) and can accept the log ramp. The colored images are 8-bit. Do the
    
    3-band log scale on the edited k-ratio image with the log ramp.
    - 'Select / draw rectangle' - draw the outline of the ramp.
    - 'edit / log ramp'.
    - Make sure the ramp values are positive. The complete scale goes from 0.001 to 1.0. Values outside this will be assigned the 'outlier' colors.