2 Ways To Create Realistic “Depth of Field” | Minervity
http://www.minervity.com/news/2-ways-to-create-realistic-depth-of-field/
Java Image Processing - Blurring for Beginners
http://www.jhlabs.com/ip/blurring.html
I ♥ BLUR - Once again, I got distracted... | simurai
http://simurai.com/post/684792689/text-blur

"I ♥ BLUR - Once again, I got distracted experimenting with CSS3. ;-) So far I just knew how to make text look blurry by adding a lot of text-shadows like in this example by David. But it’s more a glow, because the text still stays in front. But what if you wanna turn text into smoke? Luckily you can set the text-fill-color to transparent and that gives your text a really nice smoky blur. color: transparent; text-shadow: #fff 0 0 100px;"

I ♥ BLUR - Once again, I got distracted experimenting with CSS3. ;-) So far I just knew how to make text look blurry by adding a lot of text-shadows like in this example by David. But it’s more a glow, because the text still stays in front. But what if you wanna turn text into smoke? Luckily you can set the text-fill-color to transparent and that gives your text a really nice smoky blur.

color: transparent; text-shadow: #fff 0 0 100px;

Text blur using CSS - amazingly simple.