That is, you need color and zastelennye be removed to within the text was completely black, and the background around a completely white (or transparent).
But you need to leave a smooth transition where the boundary is foreground and background. Without this transition, as if everything is obvious. And here's how to keep this transition? If you are a hard paint, and then to blur,the letters "e" will turn out slightly different sizes.
Is there any universal way without taking into account the shape and the distribution of colors in the background?