03-04-2003, 01:28 PM
How do I create a black silhouette on a white background of a person from a photo?
Cheers in advance.
03-04-2003, 02:00 PM
this is the way i generally do this.
open up a copy of the photo you want to work on (always hang onto an original)
next to the 'new layer' button, on the layers pallette, there is a button with a circle cut in half (half black, half white)
click on this, and choose "threshold"
drag the slider left and right, until you get an image which has most of the silhouette, and the least background mess. you will rarely be able to get a perfect silhouette straight up. don't worry about the jaggies for now.
when you have an approximate silhouette, click "o.k."
***for reference - an explaination of what you have just done***
you can skip over this if you want. you may find it helpful.
you have just made an adjustment layer. they allow you to "modify" underlying layers, without actually doing anything to them. you can turn them on and off. there are some funky ones in there, such as "hue/saturation" and "posterise"
play around with them, and learn as much as you can about "masks" as they are actually layers that use masks, so you can apply their affects to small protions of underlying layers if you want.
***END for reference section***
next, you are going to use the dodge and burn tools. the dodge tool will brighten up parts of a layer, while the burn tool will darken bits of a layer.
at any time, you can double click on the slider icon of the 'threshold' layer, and re-adjust the slider.
make sure your photo layer is selected, and select the burn tool.
where bits of the silhouette are missing, burn away at the photo. this will make black bits of the silhouette 'appear' in the threshold layer.
play around with the exposure, and the highlights/shadows options.
don't worry if you accidentally overpaint the sihouette.
make sure your photo layer is selected, and select the dodge tool.
where there is too much black, paint with the dodge tool, and they will vanish. again, play with the exposure and shadows/highlights options.
i find it helps to turn the adjustment layer on and off to see what you are doing, and where you need to dodge and burn.
when you are happy with the silhouette, make sure the threshold layer is visible, and go to the menu option layers>flatten image.
now apply a gaussian blur of about between 0.5 and 2.5 pixels filters>blur>gaussian blur. it is alright to blur it slightly too much, as the next step will fix this up.
apply levels image>adjust>levels
play around with the black and white sliders until you have a nice crisp silhouette.
all done. :D :roll
if this doesn't make sense, i can post screenshots to help you out.
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