Next: A Plotting Contours Up: Isys Graphics User Interface Prev: 9 Setting Colour Table
0 Setting Scaling
This dialogue is used to set the way in which data values are scaled
and mapped onto the colour table. The upper and lower limits can be
set to over or under-expose the image. All data values below the lower
limit are plotted in the lowest colour - values above the upper limit
are plotted in the highest colour. (Note that pixels with bad quality
are plotted in the background colour, ie black, which may or may not
be the same as the lowest colour in the table.)
The radio buttons on the left set how the da ta between the limits are
scaled between the extremes of the colour table. If the data contain
zeroes or negatives and logarithmic or square-root scaling are selected,
then an appropriate offset will be pre-applied to the data values.
Next: A Plotting Contours Up: Isys Graphics User Interface Prev: 9 Setting Colour Table