1.

To begin, start Photoshop CS.

2.

Choose File->Browse from the menu bar, and use the file browser to open the Old Image in your Photoshop CS samples folder.

If you see the Embedded Profile Mismatch dialog, just click the OK button.

3.

When you have the image open in Photoshop, make sure its zoom level is 100% by entering 100 in the zoom field in the status bar at the lower left corner of the Photoshop screen. (Click on the zoom field to place your cursor there.)

Your Photoshop CS screen should look something like this.

4.

To display the Unsharp Mask Dialog, choose Filter-> Sharpen->Unsharp Mask, from the menu bar.

5.

In the dialog box, set the Amount slider to 248. Take note of what happens in the preview window in the dialog box when you adjust the slider.

Next set the Radius slider to 1.8, and the Threshold slider to 19. The threshold is set fairly high to try to reduce the grain visible in the image.

6.

When you are finished setting the sliders, click the OK button to sharpen the image.

7.

Study your newly sharpened image, and then choose Edit -> Undo Unsharp Mask from the menu bar. This will display the original image. Toggle back and forth between the sharpened and original images by pressing the Ctrl + Z keys. Can you see a difference? Which version of the image do you prefer?

8.

The image that follows on the left is the original. The image that follows on the right has been modified (sharpened) with the Unsharp Mask.

9.

Make sure the sharpened image is on your screen and choose File->Save As from the menu bar. Browse to your practice folder, and name the image Practice10. Make sure the file format is JPEG and click the Save button to save the image. If you see the following dialog box, just click the OK button, and your file will be saved.