• Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint
Share this Page URL
Help

Chapter 6. Optimizing Grayscale Images > Postadjustment Analysis

Postadjustment Analysis

Anytime you adjust an image, you run the risk of introducing some artifacts that might not be all that pleasant. So let's take a look at what can happen to your image after applying Levels. But don't worry—remember, in Photoshop there is usually at least one “fix” for every artifact.

Recognizing Posterization

When you look at an updated histogram, you might see wide gaps in the histogram—this indicates posterization (Figure 6.35). Posterization is when you should have a smooth transition between areas and instead you see a drastic jump between a bright and dark area. Some call this banding or stair-stepping. As long as the gaps in the histogram are smaller than three pixels wide, you probably won't notice it at all in the image.


PREVIEW

                                                                          

Not a subscriber?

Start A Free Trial


  
  • Creative Edge
  • Create BookmarkCreate Bookmark
  • Create Note or TagCreate Note or Tag
  • PrintPrint