![]() That may sound like an ideal result, but if we look closer, we see that it comes at a heavy price. Notice that the tonal range of the image has been stretched to its limit, as if Photoshop said, "You want contrast? You got it!" The histogram now extends all the way from pure black on the far left to pure white on the far right. With Enhance Per Channel Contrast still active, let's look again at the histogram in the Levels dialog box where the problems become more obvious. The image after auto-correcting with Enhance Per Channel Contrast. As with the previous tutorial on Levels, I'm using a black and white photo here but everything we're covering applies to full color images as well: ![]() Here's the image I have open in Photoshop. If you haven't yet read through the previous Levels Image Adjustment Essentials tutorial, I highly recommend you do so before you continue since this tutorial assumes you already understand the basics of how a Levels adjustment works.Äownload this tutorial as a print-ready PDF! As we'll see in this tutorial, the Auto button can now serve as a great starting point for your Levels correction, one that you can then further enhance using the black point, white point and midtone sliders. Not only does this produce better results, but the result is no longer a "take it or leave it" situation. Adobe added a brand new algorithm to the Auto button known as Enhance Brightness and Contrast which looks at your image histogram and makes intelligent decisions about how its tonal range can be improved. And if we didn't, our only real option was to undo the Auto result and start all over again with our own manual Levels adjustment. We either liked the way the image looked afterwards, or more often that not, we didn't. And just like the Auto Tone command, the result we got was fully automatic. Prior to CS6, it worked just like the Auto Tone command found under the Image menu (which we looked at back in the Auto Tone, Auto Contrast and Auto Color tutorial). The Auto button was greatly improved back in Photoshop CS6. In this tutorial, we'll learn how to save time by taking advantage of the Auto button in the Levels dialog box, which lets Photoshop try to auto-correct the tonal range for us! We learned how to darken the shadows by setting a new black point, how to brighten the highlights by setting a new white point, and how to brighten or darken the midtones using the midtone (or gamma) slider. In the previous tutorial in this series on tone and color correction in Photoshop, we learned the basics of how to improve the overall tonal range of an image using a Levels image adjustment.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |