posted on Feb, 14 2004 @ 11:46 AM
Yomitu, please review Kano's fine thread
which outlines in great detail the
information needed to avoid leaping to inaccurate conclusions.
In many cases, a simple mix of L4-L5-L6 will NOT produce a reasonable color-balanced photo, because the pre-processing on the rover amplifies each
picture until the brightest point (in that color) is at the maximum value.
This is done INDEPENDENTLY for each color, so unless the frames are dampened back down to their original levels, the mix between them is thrown
The amplification is done to ensure that each frame has a maximum signal-to-noise ratio. That makes it a little more difficult to recombine the
pictures easily (unless the brightest point in the shot is either white or gray in actuality), but gives the scientists more data.
I'd really like to see them go out of their way to provide the amplification levels for each frame, as that would make a recombination for interested
third parties much simpler and with significantly increased accuracy.
The NASA shot is one that I would consider "reasonable" based on comparison to other shots containing the calibration tool. The naive L4-L5-L6 mix
is inconsistent with those shots.
[Edited on 2-14-2004 by BarryKearns]