I've had a few requests recently for removing the background of an image - making it completely white.
There are actually a few ways to do it. I would normally make a layer mask and just remove everything that
you don't want - refer to the early pages and the Rodman picture to see how to do that. The only thing you would
do differently is at the end instead of desaturating the layer fill it completely white.
You can also use the magic eraser but I've never found that works very well - unless you have an object and
background that are very different from each other.
The most successful images for removing the background from have a fairly pale background already - you're
just tidying them up. If it is a dark background it is hard to do it convincingly.
Here's the original image that I'll use for these demos.
Sorry, after I'd done all this I realised that I forgot to resize the images so they're kind of big on the page.
At least you can see them though.
Some of the other ways you can do it are:
1. Background eraser tool. If you click and hold the eraser tool you will see this option. Select it and a reasonable
size eraser. Here you want to have the circle of the eraser on the edge between what you are keeping and the
background but don't let the crosshairs touch the item you're keeping.
1. You can see here that the bike is staying and the background is disappearing. Depending on the contrast
differences you can adjust the sensitivity just below the toolbar.
2. Now I've been all the way round.
3. Here I've selected a rectangle and deleted everything outside of it - just to save some time.
4. Here I've gone in with the eraser and just deleted all the stuff that wasn't touched by the background eraser.
5. If you look closely you'll see that the background eraser doesn't do a perfect job. Depending on the color it
sometimes only partially deletes things - it leaves them semi-transparent. Here you can see the before
and after - I just went over parts with the regular eraser.
before:
after:
6. A useful way to see how good the edges are is to make a new layer and fill it with a bright color. I've used green
here because it contrasts with all the colors on the bike. You can see how rough the edges are.
7. Here you can see where the background eraser took some of the image away too - it happens when there isn't enough
contrast to tell the difference - here it was the tyre and the pavement.
8. I used the history brush to fix that - it's just below the regular brush and works by putting back what you deleted.
Just use it carefully to correct the image.
And the final image - I added a drop shadow (right click and select blending options) which makes it look a little better.
The tyres are a little rough but it's not too bad overall.
The other way gives similar results but is probably a little quicker.
1. Go to filter>extract
2. It opens a box for the next step. You basically take the paintbrush and draw around the whole object -
overlapping the object and background all the time. You don't have to be too careful but the neater the better.
3. Then go to the paintbucket and fill the centre of the object.
4. Then hit okay and you'll get something like this - you'll see that it gives you the same sort of effect as the background
eraser at this same stage. Then just go in and tidy it up the same way and you're done.
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NISI DOMINUS FRUSTRA.