How do you tweak pregnancy tests to see if its a positive or not? I've always wondered! & I want to learn!
you put the pic into an image editing program (gimp, etc) and play with the contrast, curves, or invert it. :)
i just put it in paint and invert it
on tinypic.com you can invert it and decorate it same thing with Picnik.com
I load it on Picnik.com and them go to effects and choose gritty, and then adjust the contrast and lighting. That almost always bring out a line if there is one to be seen. Sometimes I invert it too.