How to clone background?

I have this picture, where I would like to fill out the green in the top with the background from the picture, so fix that the picture have not been cropped in 4:3.

Can a background like this be cloned?

enter image description here

Answer

You could use Photoshop’s CS6 (also available in CS5) content aware feature.

Select the part you want to fill with the selection tool.

Shift+Backspace to launch the fill dialog.

Make sure “Content-Aware” is selected under the “Use” part, and you’re done.

Tip: To get an even better result, you could use content-aware on the thin line that separates the original background, and the one created using the content aware tool.

EDIT:
Added some photos as example here

Attribution
Source : Link , Question Author : Sandra Schlichting , Answer Author : Shahar

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