Photoshop Mask Analysis
I first learn Photoshop, the mask of some not yet understood, when the mask always feel very abstract concept, although the books do follow a lot of examples of practice, but in their own application process, but do not know how to Using Photoshop in this feature. Alpha channel looked like the name, I know what to do. However, several times, I do plan in the process of discovery I would like to modify a part of the image, but each time after selection, very troublesome, and can not get the desired results. Then I thought of the book seen before in such situations can be borrowed to solve the mask, so I moved out of Photoshop Daquan, entry to the master of the class textbook, and began my second time, third time's learning. Finally also realize a number of reasons, in the here and share with you.
What is the mask
First, we must first figure out the concept of mask. We are in the creative process, I hope only one image of a region modification. In general, we can select the image on the local, the next step after the establishment of constituency work, but we know that each constituency has been established when the next selection will be lost, that does not it's all over! Therefore, the design, Adobe Photoshop is designed for the members of the electronic shielding mask. This technology allows the user to an established constituency save the mask as a shield attached to a new channel to (such as the Alpha channel). Then we can enter the channel Channel tab, add any new control channel, use more mask channel, we can arbitrary choose between several different switch any, from this you do not have to do this The trouble was.
In fact, far more than mask the use of mutual switching constituency that simple. We can even add through its various constituencies, subtraction, duplication of work. This shows that the mask is very important in Photoshop a link, only it has the necessary knowledge, our work can be more wealth to the flexibility of production will become more colorful image.
Using mask
Let's start simple and start with quick mask. Let us open a map, then create an ellipse in the image constituency
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A-state mode switch to the Quick Mask
B-mode switch to the normal state
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Figure 1 Figure 2
Red, (we can double-click quick mask option switch button to enter advanced settings panel, in which no description.) Same time, we see in the access panel automatically generates a new channel, Quick Mask channel, in which white oval or ellipse on behalf of our constituencies established, non-protected areas. In the white area, we are free to modify, without fear of affecting the black area (protected areas). Then, when we press the B button, did the modified white area has changed again, back to constituencies. (Note: At this point in the constituency may be because of the previous modification is no longer elliptical, and below cases.) We first create a box constituency, and then a rapid mask channel, this time, we see the effect shown in Figure 1 shown, which is the translucent red mask. Then we use the Type tool to write on the leaves in a rectangular box, the last point back to normal mode. Then we see that constituency is no longer a rectangular box, but rather leaves the previously written word is subtracted from the rectangle of the constituency. In Photoshop, can save any form of constituency, whether it is created in Quick Mask mode, or using other tools, and text selection tool to create the. Determine the state in the constituency, the implementation of the Select / Save Selection command to save the constituency.
Let us look at some of the Save Selection What: Document (file): This is the image file name of the establishment of the constituency, we opened the menu, see the image files in addition to the name of the establishment of the constituency, there is a New option. That is, we choose the decision by the current constituency is to be deposited into a new file, or just into this document, create a new channel. In Operation (operation) is very intuitive options: New Channel (new channel); Add to Channel (added to the channel); Subtract from Channel (subtracted from the channel); Intersect with Channel (with the original channel intersection ). Now let's use an example to deepen understanding of the basic application mask.
Example: Draw the three primary colors chart
This is a very typical example, we can see in many reference books on.
1) a background of white spaces, RGB color mode of the new document.
2) Use the ellipse tool, hold down the Shift key and pulled out a round of constituency.
3) implementation of the Select / Save Selection, be stored as New, and renamed as the “red” (Photoshop will automatically be named Alpha).
4) maintain the constituency, and move a little distance (note that the constituency with the original intersection), then repeat the third step, name it as “green.”
5) continue to select the move, this time we can access panel in the office click in the eye, easy to observe, so that the three constituencies form a triangle as shown in Figure 1. And name the new channel as “blue.”
6) The implementation of the Windows / Show Swatches, display palette, here we only use the first six colors. Implementation of the Select / Load Selection, into the red channel, and will replace the foreground color palette on the first red. Then filled.
7), were filled with green and blue. Results are shown in Figure 2.
8) The cancellation of constituencies into the red again, and then Select / Load Selection into the green, but the attention this time is no longer choose New, but choose Intersect with Channel, get some red and green intersection, filled palette of red and green between the yellow.
9) as red and blue filled the intersection of the intersection of magenta and cyan, green and blue. The results shown in Figure 3
Figure 1 Figure 2
Figure 3 Figure 4
10) Finally, at the same time into three constituencies, the intersection of selected parts of the three colors. And filled white, or press Del to delete. To get the final RGB map shown in Figure 4.
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