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Thread: new to photoshop - how do i blur background

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    Default new to photoshop - how do i blur background

    Hi. I'm new to photography and photoshop. just wanted to seek advice on how to blur the background using photoshop CS4. thanks in advance for your help.

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    Member axis90x's Avatar
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    Default Re: new to photoshop - how do i blur background

    blur tool?
    Moments

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    Senior Member Diavonex's Avatar
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    Default Re: new to photoshop - how do i blur background

    Photoshop

    1. Select the area you want to blur

    2. Use the Filter-Blur tool to blur the area


  4. #4

    Default Re: new to photoshop - how do i blur background

    1. Duplicate the background layer
    2. On the duplicate layer, mask out the subject so that only the background is revealed. NOTE: This has to be done accurately so no part of the subject is showing beyond the edge of the mask.
    3. Go to Filter > Blur > Lens blur. Choose the source option for "Layer mask" (shown below). Set the radius to the amount you want to blur the background.




    This is why you need to mask very carefully. If your mask isn't accurate, the blurring will create halos like this around the subject:

    Last edited by Peano; 16th March 2010 at 08:25 AM.

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    Default Re: new to photoshop - how do i blur background

    Thanks a lot for the help!

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    Senior Member sinned79's Avatar
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    Default Re: new to photoshop - how do i blur background

    shoot it right in the first place?

    if u are using DSLR... have a large aperture lens (f1.4 or f1.8), use that lens and shoot to gain such effects. Do some read up about bokeh photography.
    Last edited by sinned79; 18th March 2010 at 03:21 PM.

  7. #7

    Default Re: new to photoshop - how do i blur background

    1. Open www.google.com
    2. Enter "how to blur the background using photoshop CS4"
    3. Click and read.
    Alpha

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    Senior Member Diavonex's Avatar
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    Default Re: new to photoshop - how do i blur background

    Quote Originally Posted by sinned79 View Post
    shoot it right in the first place?

    if u are using DSLR... have a large aperture lens (f1.4 or f1.8), use that lens and shoot to gain such effects. Do some read up about bokeh photography.
    For P&S camera, you may have to resort to Photoshop to blur the background because of the small sensor.

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    Default Re: new to photoshop - how do i blur background

    This is Rick Sammon method on how to blur the surrounding as if it is taken with a zoom len with wide aperture :

    1) Select "Filter", then "Convert for Smart Filter".
    2) Select "Filter", "Blur", "Gaussian Blur", adjust the radius depending on how much you want the blur effect on the surrounding.
    3) Now look at the layer window on the right hand side, you will see a smart filter layer mask.
    4) Click on that layer mask
    5) Now select the Brush, adjust the size of the brush and paint over the area you want it to be in focus.

    Search whether you can find his video clip on the website.

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    Senior Member sinned79's Avatar
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    Default Re: new to photoshop - how do i blur background

    Quote Originally Posted by Diavonex View Post
    For P&S camera, you may have to resort to Photoshop to blur the background because of the small sensor.
    dats why i am saying if TS is using DSLR... i wun be surprise if TS is using DSLR but dunno how to do bokeh shots.

  11. #11

    Default Re: new to photoshop - how do i blur background

    Quote Originally Posted by sinned79 View Post
    dats why i am saying if TS is using DSLR... i wun be surprise if TS is using DSLR but dunno how to do bokeh shots.
    maybe he wants to blur more.

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    Senior Member Diavonex's Avatar
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    Default Re: new to photoshop - how do i blur background

    Kespina17, maybe you can tell us if you're using a P&S or DSLR.

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    Default Re: new to photoshop - how do i blur background


  14. #14

    Default Re: new to photoshop - how do i blur background

    Quote Originally Posted by kutten View Post
    This is Rick Sammon method on how to blur the surrounding as if it is taken with a zoom len with wide aperture :

    1) Select "Filter", then "Convert for Smart Filter".
    2) Select "Filter", "Blur", "Gaussian Blur", adjust the radius depending on how much you want the blur effect on the surrounding.
    3) Now look at the layer window on the right hand side, you will see a smart filter layer mask.
    4) Click on that layer mask
    5) Now select the Brush, adjust the size of the brush and paint over the area you want it to be in focus.
    If you use this method, you'll get a halo around the subject. See my post above about using lens blur instead of Gaussian blur. Build the mask first, then apply lens blur. That won't leave a halo.

    Example: I want to retain the red rectangle (subject) in sharp focus but blur the black lines in the background:



    Using your G/blur method described above, here's what I get:



    Using lens blur and the "layer mask" option in that dialog box, here's what I get:


  15. #15

    Default Re: new to photoshop - how do i blur background

    wow Peano thanks for the effort! *thumbs up*

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    Senior Member ovaltinemilo's Avatar
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    Default Re: new to photoshop - how do i blur background

    juz to add my 0.02cents...one thing to take note for using cs to achieve bokeh can only be applicable with certain shots...if ur distance between ur subject and backgrnd is not differentiated nicely, using cs can be a pain too...so probably, getting a fast lens to get a nice bokeh+ basic concept would be better(if u r using dslr)....
    Last edited by ovaltinemilo; 19th March 2010 at 02:05 PM.
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  17. #17

    Default Re: new to photoshop - how do i blur background

    Quote Originally Posted by ovaltinemilo View Post
    one thing to take note for using cs to achieve bokeh can only be applicable with certain shots..
    Erm. just something to note. You can never "Achieve bokeh". Bokey is the quality of the out-of-focus blur, not the blur effect itself. The correct term is "To achieve a shallow depth of field".

    The bokeh itself will then depend on the lens.
    Alpha

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    Senior Member ovaltinemilo's Avatar
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    Default Re: new to photoshop - how do i blur background

    Quote Originally Posted by Rashkae View Post
    Erm. just something to note. You can never "Achieve bokeh". Bokey is the quality of the out-of-focus blur, not the blur effect itself. The correct term is "To achieve a shallow depth of field".

    The bokeh itself will then depend on the lens.
    ooh ya...agree...my bad...coz i assume he wants to have nice oof backgrnd but doing in a software approach rather than lens approach...tt's why i used the term interchangeably... hope he differentiates what lens can do and what software can do
    Last edited by ovaltinemilo; 19th March 2010 at 04:26 PM.
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