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How to get a well blurred background with a digital camerain Tutorials |
By albertocampione/Alberto (2,039) 
on February 4, 2003 6:59:14 AM CST
Introduction IntroductionTHE HIGH DEPTH OF FIELD OF DIGITAL CAMERASHOW TO GET A WELL BLURRED BACKGROUND ***I'm really sorry for my poor English, I hope you understand me!*** ***Thanxs to Marco Bertini for many corrections to my awful English*** One of the bigger limits of the digital cameras with a little CCD sensor is the high DOF at every focal setting. Although this feature can be useful in some type of shots, macro photo in primis, its very nasty when you want to get (for example) a portrait with a well blurred background. The only solution is a post-production work but its very difficult to obtain a good realistic result. Ill describe an easy tecnique, PRESUMING YOU HAVE A MEDIUM SKILL OF ADOBE PHOTOSHOP. -------------------------------------------------------------------------- 
This is the original photo, I use a drawing instead of a real photo because is more suitable to understand the tecnique.
Solution #1The more immediate solution, that give an ugly result, is to select all the part of the photo that you dont want to keep in focus and blur it with the Blur function.Okay, you can see the big problem, the result look unreal because there is a red halo around the subject caused by the blurring of the background that goes out of the subject edge.  THE UGLY RESULT!!
Solution #2If using a Layer Mask you split the subject from the background, creating a BACKGROUND layer with the original photo and a SUBJECT layer with only the subject, you'll get the same ugly result
BACKGROUND Layer 
SUBJECT Layer
JUST THE SAME UGLY RESULT!
Solution #3Ok, the problem is the subject on the BACKGROUND layer,I made an hole in that layer and the problem is over! No, dont work, you'll get a white halo instead of the red halo. :-( 
The 'Holed' BACKGROUND Layer
SUBJECT Layer 
A DIFFERENT UGLY RESULT!
The right solutionStart with the original photo in the BACKGROUND Layer, duplicate it and rename the result SUBJECTCreate a Mask Layer on SUBJECT layer, with a soft brush draw a mask that hides the part that you dont want in focus. It's easier to get a rough mask now and refine it after You'll get a SUBJECT layer with only the subject that you want to keep in focus.
The BACKGROUND Layer
SUBJECT Layer Go in the BACKGROUND layer and using the marvelous ;-) CLONE-STAMP tool copy part of the photo that you want to blur OVER the part that you want to keep in focus, it is not necessary to be too accurate if the background is not symmetrical at all 
The BACKGROUND Layer partially clone-stamped 
The BACKGROUND Layer completely clone-stamped Now using a Blur filter (Gaussian or what you like better) blur ONLY the BACKGROUND layer (dont exceed or the result will be unreal!). Merge the BACKGROUND Layer with the SUBJECT Layer and... 
Ta-daaa, the perfect result!!! ;-) Before merging the two layers, if necessary, refine the layer mask of the SUBJECT layer with the Eraser tool. I suggest you to adjust levels, contrast etc. separately on SUBJECT and BAKCGROUND layer. If you are thinking that it is too easy obtain a good result with the simple drawing of this tutorial try to see these 2 examples (one is mine and the other one is Alberto Merlo's): RITRATTO THE BAND The only problem in this tecnique is to get a good layer mask but the result is worthy, I think! Give me your feedback and suggestions if you want I would like to see photo treated with this tecnique, you can use it whatever you want for commercial or not-commercial use. My Email is: albertocampione(AT)katamail.com ***Change the (AT) with @ --- (Please DONT SPAM!)*** This tutorial is (C) Alberto Campione 2003 Dont reproduce it without my permission please
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