How to change the background of a photo?

Question

Tamer Kholy · Answer

Open your image in photoshop
Create a new layer for the background or place another image of your choice (make sure that in the layer panel the background layer is beneath your image layer)
You can extract the your image out of the current background with different method, I will discuss one (quick selection tool)
You should start by selecting the object, and this operation always depends on our background, if its a solid color then selecting the background then reversing the selection in order to select the object would be the perfect solution.
You can select your object using several tools including but not limited to: Magic wand tool, Quick selection tool (along with lasso tool), Pen tool and Color range, each photo has it's own strategy.
Assuming you have your object selected, hit Refine Edge in the tool properties bar, the refine edge properties panel will appear.
Select your view, I personally prefer using the following two views, black background for light objects, and white background for dark objects.
Ensure that smart radius is on, and then play with the radius of the edge detection until the edges of the hair look reasonably detailed and naturally roll off.
Now brush your way through the hair using the Refine Radius Tool (Refine Brush). This tool allows you to selectively expand your edge detection area, bringing in more details from the subject as Photoshop learns what is and isn't background. It may take you a few tries to figure out how best to use this tool. Press alt while brushing to reveal the details if you've made a mistake.
You can play around with the adjust edges options until satisfied, but be careful as too much of smooth, feathering will only result in softening the edge and looking strange and not natural, and I usually don't find contrast useful.
Adjust the shift edge and the Decontaminate Colors they are always variable for every photo you will refine.
Output your refined selection, I always output my selection to A layer mask so I can always come back and adjust it whenever I want to.

Vicken Derderian · Answer

There is a software called Topaz and that can do it

Yaqoub Alomar · Answer

If I remember correctly, you have to open both images (the original and the new background) in a photo editing program (I use pixlr.com). On your original image, you make a new layer and copy-paste your new background in. Then mask that layer.This just means that you can't see it. It looks like you're back to that first layer, but keep the mask layer selected. Now use a brush tool to paint over the areas you'd like to replace (don't mess with the colors). The masked layer will show back up in those areas. Ta-da! A new background.

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How to change the background of a photo?

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