CHAPTER 2 IMPROVING DIGITAL PHOTOS HISTOGRAM GAPS (Yahoo free web hosting)
CHAPTER 2 IMPROVING DIGITAL PHOTOS HISTOGRAM GAPS If you open the Levels dialog on an image when you ve previously made a brightness, levels, or curves adjustment, you may notice gaps in the new histogram. What do the gaps mean? The following image shows gaps in the histogram after correcting brightness. Logarithmic mode is used to make the histogram easier to see. The gaps represent lost information. When the GIMP uses the input sliders to expand the tonal range of an image, some of the fine differences between pixels at the extremes of the image (in the very bright or very dark parts) may be lost. Lost information sounds bad, but most of the time, it wasn t anything you cared about, or you would have set the sliders differently. But you can see the result in the histogram when you look at the image. This also means that you can sometimes use the GIMP as a forensic tool, to tell whether someone else s image has been edited in this way. Another thing you may notice about the Levels dialog is the Auto button. This is theoretically comparable to the Auto Levels in some other photo-editing programs; but in practice, I find that it seldom helps photographs very much. (This may say more about which photos I try it on than it does about the GIMP s Auto Levels.) It s always worth a try; you can fine-tune from there if it doesn t do quite the right thing, and you always have the Reset and Cancel buttons if you don t like the effect.
Note: If you are looking for best quality webspace to host and run your tomcat application check Vision virtual web hosting services