Getting white teeth is easy to accomplish with modern photo editors.
Whitening teeth is one of the most commonly edited aspects in portrait photography. Thanks to today's quality image editors like Adobe Photoshop, GIMP and Corel Paintshop Photo Pro, whitening teeth is a fairly simple process. The easiest way is to select a white-colored brush with a low opacity and paint over the teeth, but this doesn't give a great deal of control. Using a hue/adjustment layer can lead to much better results. For the purposes of this tutorial, instructions are for Adobe Photoshop. Other programs operate similiarly, however, and you should be able to adapt these instructions.
Instructions Fill" from the menu at the top of the screen. In the "Contents" drop-down box, select "Black." Click "OK" to accept. It will appear as if the work you have done has disappeared.
5. Select the brush tool and choose a small, feathered brush size that you can use to paint over the teeth. Make sure the foreground color is white and the background black. Use the brush tool to paint over the teeth. Lowering the opacity of the brush will lower the level of whiteness when painting. Increasing the opacity will have the opposite result.
6. Change the opacity of the Hue/Saturation layer in the layers palette if you want to make further adjustments to how white the teeth appear. As when using the brush, increasing opacity will increase whiteness and lowering the value will decrease it. When finished, save your work.