Open the image in Photoshop. I've chosen this photo of a tiny flower taken in a Zoo at
Cincinnati. I am trying to show you the before and after of that shot. The one right below is the original.
Before
It's very simple 3 step process.1st Step:
Click on 'Quick Selection Tool (W)' and select any area of the picture you want to select. Like in above shot I selected the flower in center.