create. From there, however, it becomes more complex as the various selections are intersected and subtracted. All the steps will be explained in the tutorial. While it’s
important to understand the basics of how to create luminosity masks and the tones they select, mask creation can be a bit cumbersome. So, to efficiently use the masks
in a Photoshop workflow, it’s usually best to create a set of Photoshop actions to do all the key strokes. Actions greatly simplify the process of generating the masks; a
couple of clicks and you're done. I make my personal set of actions to create the luminosity masks available on the last page of the tutorial if you’d like to use them.
However, I would urge you to take the time to gain a good understanding of the process by which the masks are created and to actually practice making them. It will be
useful when reading the other tutorials on this website and will allow you to develop a very personal approach to employing the masks, which, in the end, will make your
images more distinctive.
Several of the other tutorials on this website are an extension of the concept of tone-based adjustments that the luminosity masks make possible. While this first tutorial
will provide the basic concepts, there is a wide range of possibilities beyond what it can cover. The other tutorials will look at additional ways that the masks can be used
as well as exploring other techniques for tonal adjustments. Please visit them when you have time. The "tutorials" link in the header of each page will take you to the
tutorial table of contents.
Before going too far, I should mention that I work on a Windows-based computer using Photoshop CS. The instructions in this tutorial will be given with those parameters
in mind. Some facility with Photoshop will be assumed. While the details of the processes will be explained, I won't attempt to provide definitions of every Photoshop
term or how to perform common steps. There are many reference guides to Photoshop that can help you, including the User Guide and the embedded "Help" menu in
Photoshop, but if you've worked (or played) with Photoshop, you're probably familiar enough with the program to do the necessary steps. Additionally, I prefer to use
Photoshop shortcut keys whenever possible. These are a combination of the Shift, Ctrl, and/or Alt keys being held down at the same time and, while continuing to hold
them down, hitting a letter, number, or symbol on the key board. The ones I list will be the defaults that come programmed into Photoshop. If you've altered your
shortcut keys to change the defaults, it's assumed you know what your corresponding shortcut is or can at least restore the defaults. Mac users will know that "Ctrl" on a
PC is the same as "Command" on a Mac and that "Alt" on a PC is the same as "Option" on a Mac. There are usually drop-down menu commands that correspond to the
shortcut keys, but these often become more complex than the shortcut keys, so I generally don't use them. I also like the classic Windows look to my programs with
neutral gray colors, so the screen captures might look a little old-fashioned.
Below is a recent sandstone detail image that incorporates many of the luminosity masking techniques discussed in this tutorial. Luminosity painting (a more advanced
way of using luminosity masks and one discussed in another tutorial on this website) and saturation masking were also used to develop this image. Roll over the image to
see how it looks when the adjustment layers that use luminosity masks are turned off.
Section1：最基础的蒙版——亮部
亮度蒙版无非就是图像亮部上的选区。最基础的亮部蒙版，就是选取图像亮部成比例的像素。这里有三个不同的方法来制作亮部蒙版（图1）。我罗列了这三
个方法，但你只需选择一种来创建选区。
1.Alt+Ctrl+~。如果使用的是CS4以后版本，现在快捷键改为Alt+Ctrl+2。
2.按住Ctrl，然后鼠标点击RGB通道。
3.选择RGB通道，把它拖到通道底部的“作为选区载入”的图标上。
