Hi,
The attached VI grabs a live image and then snaps a reference image. It then allows for subsequent frame subtraction and display or live subtraction from the reference image and display.
To brighten the 'difference image', I've so far used a Log function on the mathlookup table, which works okay, but doesnt quite give me the contrast control I'm after.
What I want to do, is replace the Math Lookup Table with a custom lookup table where I can input the following in the front panel:
- Number of 'bins' (N)
- Minimum 'bin value' (GreyMin)
I want the lookup table to remap the 8-bit data and redistribute into 'N' bins for 255 minus GreyMin.
i.e. if I input N=16 and GreyMin=127. Then greyscale values of 0to15 become 127, 16to31 become 135, 32to47 become 143 etc.
I dont really know where to start with more complex lookup tables like this, so any pointers to documentation etc would be very helpful.
Cheers,
Matt
