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Topic : "camera blur in photoshop" |
Slimjimer
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 Posted: Sun Mar 16, 2003 12:02 am |
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| I got a photoshop question, say I have a picture that is in focus. I want to make it look out of focus, but look like a realistic blur, not a gaussian blur or anything. Does anyone have any ideas on how I might go about this? |
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Dr. Bang
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| Posted: Sun Mar 16, 2003 3:46 am |
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You use the Blur tool, its the 2nd function of the Smudge tool.
So just click and hold on the Smudge tool button, a button menu will appear and pick the Blur tool.
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Bilbo
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| Posted: Sun Mar 16, 2003 4:30 am |
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You might want to try separating the image into different layers, laying out the far background at the bottom layer, and the foreground at the top layer, with as many depth slices in between as needed. Then run a gaussian blur filter on each of the layers- starting with a large radius for the bottom one (or whichever layer you decide to be mostly out of focus), and diminishing the radius as you go away from it. The more layers you create in your image, the better the transition will look.
you can add realism by accentuating highlights in the blurred regions and mimmick a bokeh effect. (filter->other->maximum can be a good start for this). |
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Dr. Bang
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strata
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| Posted: Sun Mar 16, 2003 5:32 am |
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http://www.hippytrippy.net/hires/reboot.jpg is an example of focus depth I used in one of my pictures. Gaussian blur does work really well with this, but it's important that you separate the depths of the image as has been stated, and pretty much always do less than you think you need.
You can also try doing dust and scrathes on the blurry layers before blurring them if the result is not quite what you're after, sometimes gives you that extra kick you need.
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Dr. Bang
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Frog
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| Posted: Mon Mar 17, 2003 6:46 am |
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Gaussian blur can never really emulate camera optics - they're just too different. The problem is that optical out-of-focus isn't just blur, things get rounded out and distorted as well as going fuzzy, that's why all highlights and light sources become round blobs in unfocused parts of photos.
There is a good tutorial on Neil Blevin's site on how to do it manually, otherwise there is a comercial plugin called Lenscare that seems to do a good job.
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