There are many reasons why people's teeth in portrait photos are not white. It may be that the person's teeth are yellow, or it may be a problem with the lighting or the tone of the photo.
Before treatment, you need to know what color your teeth are .
The specific method is to use the eyedropper tool to click on the tooth, and then double-click the foreground color to see what color zone the clicked color falls within. You can try it a few more times to get more accurate. Under normal circumstances, it is not very accurate to aim directly with your eyes.
This tutorial is for whitening yellow teeth. If you have teeth of other colors, you can choose to edit the color accordingly in step 2.
