Photographs are one way to save memories of events and times in your life, so it can be frustrating when a shadow makes its way into an important part of the picture. Adobe Photoshop has several tools that can help you get rid of unwanted shadows and bring the "light" back into your photo.
Open Photoshop, then select "File" and choose the picture you wish to remove the shadows from.
Locate the lasso tool and select it; outline the shaded area using lasso. This tool will only make changes to the area you have selected.
Find "Image" at the top of the page and select "Adjustments," then "Hue/Saturation." This will bring up sliders that will allow you to adjust the hue, saturation and brightness within the selected area.
Adjust the sliders by left-clicking and holding your mouse to drag the slider either the left or the right. The first slider is for the hue. Hue works to change the color of the selected area to an entirely different color; for example, if the area selected is red, adjusting the Hue will change it to green by sliding it in one direction or to blue going in the opposite direction. You may not need to use the hue slider at all. The second slider is for saturation. When the notch is in the middle of the slider, it is at zero; moving it to the right is moving it positive and moving it left is negative. By moving the slider to the right you are adding saturation, or natural color, to the picture. By moving it in the opposite direction you are taking out saturation. The last slider is for brightness. By moving the slider to the right it will brighten the selected area. Moving it to the left will darken the area.
Repeat steps 1 through 4 until you have achieved the results you wanted.
Select "File" then "Save As." This will save the corrections to your picture as a separate file without overriding the original photo.
If you are having problems with the lasso tool, you may also right-click the tool and select "polygonal lasso tool" or "magnetic lasso tool;" the polygonal tool will make a straight line for you to work in and the magnetic tool will automatically outline the objects you trace in the picture. For other options on shadow removal, consult the clone tool and patch tool offered in Photoshop.
These directions are for Adobe Photoshop CS; however the names of tools within the program remain the same for each version of Photoshop.