I've been using sikuli for awhile, however I have an issue with it... It's not sensitive enough. I'm trying to match something on the screen that is -EXACT-, and there are a few other items on the screen that look similar enough that sikuli is mistaking them for what I'm actually looking for, so I need to make it look for ONLY this item with no variances at all.
How can I do this?
Oh and to explain my issue a bit further, I am writing a loop for a game, once a progress bar has reached 100% - it needs to allow the loop to finish (And start over again), however the progress bar is just a plain bar - so when sikuli looks for it on the screen, it finds the partially complete bar (Since apparently it matches different lengths/widths/sizes of the image it is looking for), and triggers.
If you are using Sikuli IDE click image miniature, for which you want to change sensitivity. You will be presented screenshot of your desktop with and occurrences of pattern(your image). Below there is a slider witch changes sensitivity. While changing it you will notice that highlighted occurrences of the pattern increase or decrease accordingly.
This method assumes that you have your game on screen (so windowed mode, not fullscreen), but even if you don't you still can adjust sensitivity, just you won't see 'live' results of search.  
If you call sikuli from Java code, you have to use Pattern(image.png).similar(y.xx)
where the argument of simmilar is something between 0.00 and 1.00.
I haven't used second method so you may need to experiment with it.
Change Sikuli's sensitivity?