tailieunhanh - Photoshop 6 for Windows Bible- P21

Photoshop 6 for Windows Bible- P21:If you are reading this foreword, it probably means that you’ve purchased a copy of Adobe Photoshop , and for that I and the rest of the Photoshop team at Adobe thank you. If you own a previous edition of the Photoshop Bible, you probably know what to expect. If not, then get ready for an interesting trip. | Chapter 12 Working with Layers 571 Tip If you encounter unrealistic edge pixels and the automatic matting commands don t . . solve your problem you may be able to achieve better results by fixing the edges manually. First switch to the layer that s giving you fits and Ctrl-click its name in the Layers palette. This creates a tight selection around the contents of the layer. Then choose Select Modify Contract and enter the width of the fringe in the Contract By option box. Next choose Select Feather Ctrl Shift D and enter this same value in the Feather Radius option box. Finally press Ctrl Shift I to inverse the selection and press Backspace to eliminate the edge pixels. Figure 12-14 shows the results of applying this technique to my television. By set- ting the Contract and Feather commands to 1 pixel I managed to remove the edges without harming the layer itself. And the effect looks better than that produced by the Defringe command as you can compare for yourself with Figure 12-13 . Figure 12-14 Here I removed the edges manually using the Contract Feather and Inverse commands. This looks way better than anything Photoshop can do automatically. Blending layers Photoshop lets you blend layers like no other program in the business. In fact Photoshop does such a great job that it takes me an entire chapter Chapter 13 to explain these options in detail. I offer this section by way of introduction so that you re at least aware of the basics. If you have bigger questions Chapter 13 is waiting to tell all. The Layers palette provides three basic ways to blend pixels between layers see Figure 12-15 . None of these techniques changes as much as a pixel in any layer so you can always return and reblend the layers at a later date. 572 Part IV 4 Layers Objects and Text 4- The Opacity value Enter a value in the Opacity option box near the top of the Layers palette to change the opacity of the active layer or floating selection. If you reduce the Opacity value to 50 percent for