tailieunhanh - The Adobe Photoshop CS5 Book for Digital Photographers part 10

The Photoshop CS5 Book for Digital photographers part 10 is full-color, graphically rich, and contains project-based examples of every key step in the digital photography process. Integrating all the newest features of Photoshop CS5 into the book’s workflow, Scott shows readers how to work with their images like a pro, from importing to organization to correction to output. In addition to fully updating the book for CS5, Scott has also added a brand new chapter, which lets readers in on his entire, personal post-processing workflow by incorporating his popular 7-Point System into this book | The Adobe Photoshop CS5 Book for Digital Photographers Before After Camera Raw Beyond the Basics Chapter 3 71 The Adobe Photoshop CS5 Book for Digital Photographers Fixing Chromatic Aberrations That Colored-Edge Fringe Chromatic aberration is a fancy name for that thin line of colored fringe that sometimes appears around the edges of objects in photos. Sometimes the fringe is red sometimes green sometimes purple blue etc. but all the time it s bad so we might as well get rid of it. Luckily Camera Raw has a built-in fix that does a pretty good job. Step One Open a photo that has signs of chromatic aberrations. If they re going to appear they re usually right along an edge in the image that has lots of contrast like along the edges of these rock formations . Press Z to get the Zoom tool and zoom in on an area where you think or see the fringe might be fairly obvious. Here there s red fringe running along the edges of the rocks. To remove this start by clicking on the Lens Corrections icon the sixth icon from the left at the top of the Panel area. Step Two In the Profile tab turn on the Enable Profile Corrections checkbox and Photoshop tries to remove the color fringe based on your lens make and model it learns this from your image s EXIF data. See page 66 for more on this . If the image still needs correction try the C. Aberration slider under Amount. If the automatic way doesn t work for you try getting rid of the fringe manually. 72 Chapter 3 Camera Raw Beyond the Basics The Adobe Photoshop CS5 Book for Digital Photographers Step Three At the top of the Lens Corrections panel click on the Manual tab. Down in the Chromatic Aberration section there are only two sliders and you just drag toward the color you want to fix they re labeled the top one fixes red or cyan fringe the bottom fixes blue or yellow fringe . But before you begin dragging sliders you may want to click on the Detail icon the third icon from the left at the top of the Panel area and lower the .