How to get a white backdrop in ps


pentaxanne

Link Posted 09/08/2010 - 23:35
Hi all, just wondered how people edit there backrounds, ie when using a white backround sometimes i get a colour cast from the peoples clothes, how can this be delt with also the best way of brighting it back to white and brighter without adjusting the rest of the image.

thanks in advance.

johnriley

Link Posted 09/08/2010 - 23:45
You could select the background using the Magic Wand tool, then select levels, choose the right hand white point button and click in the area selected. It will be rendered pure white.

The selection may need modifying and perfecting after use of the Magic Wand, depending upon the accuracy of the auto selection.
Best regards, John

Don

Link Posted 10/08/2010 - 01:02
pentaxanne wrote:
Hi all, just wondered how people edit there backrounds, ie when using a white backround sometimes i get a colour cast from the peoples clothes, how can this be delt with also the best way of brighting it back to white and brighter without adjusting the rest of the image.

thanks in advance.

some problems are best avoided. In the case of white backgrounds there are three simple rules:

1) Light your backdrop, evenly (and about two stops brighter (for white) than the key light for your subject).

2) Light your subject properly. (3 point is best: key, fill, separation/hairlight)

3) put some space between the subject and backdrop.


those three rules become incredibly important when shooting photos or video in front of a green screen.....
Fired many shots. Didn't kill anything.
Last Edited by Don on 10/08/2010 - 01:05

jon.dc

Link Posted 10/08/2010 - 08:50
I often used to following trick in ps if the background was not completely white but not sure how it will work in your situation.

Open your image in PS.

Layer --> Duplicate Layer. Click Ok.

Layer --> Blending Options--> Change from Normal to Screen. Click Ok. You now have a white image.

Layer --> Duplicate Layer. Click Ok. Even whiter.

Layer --> Blending Options--> Change from Screen to Overlay. Now the image is really strange

Change the opacity until you are happy with the image. Click on okay.

Now to get a really white background, click on Layer --> New Adjustment Layer --> Levels

In the histogram, drag the white arrow to the right, left a little. Watch your image.

Also drag the middle arrow for the subjects a little until you are happen.

Click on Ok.

Now click on Layer and flatten image.
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