The ultimate wrist of the channel cutout

When using Photoshop, we often have to "pull" out some objects with complex shapes very cleanly, for the production of synthetic images used, generally we need to enlarge the image using a lasso or a path tool manual circle, with these two tools can be made, but this is the most common method, As a master of graphics, how can you not use the channel it! For the use of the channel is a graphic master one of the most important basic skills oh.

The use of the channel first to analyze the image, to find out the need to select the region and the surrounding areas of the different points, and then differentiated, so strong stronger, weak weaker, rely on flexible use of channels and traditional tools to pull the map, the following examples to explore.

Common method of Drawing:
1. Hold down the SHIFT key with the Magic wand tool to select it. Properly grasp the feather value.
2. Use color range selection.
3. Use circle tools such as: Lasso tool. Rectangle Circular. Can solve most of the problems. The key is the setting of the parameters in the property bar.



Use the channel to pull out the graph, the ordinary pull the graph method also mostly applies in the channel, we take the orange in the picture as an example, introduces the channel in "pull" the function and the method of the diagram.

1. Open an RGB image with Photoshop and expand the RGB three-color channel panel for the image to use.
2. Put the channel panel and image in a parallel position and now analyze the color difference between the orange and the plate in the image. Using the mouse to pick red, Green, blue channel, through the comparison to find the selected objects and the surrounding environment of the most obvious one and select this channel



Because the red channel has the strongest image contrast, we select it.　　The reason is described later. 3. Open the Triangle button on the channel panel, copy the channel, name #4, and keep the current selection of the #4 channel, that is, keep the #4 channel as the current working channel. Make it clear that in the channel the black is the selection area, the white is the protection area, the gray is the translucent area.

4. We can use the highlight (Dodgetool) and deepen (burntool) tools in the toolbar to highlight and deepen the image's shading to enhance its contrast. In addition, the Properties control Panel appears when you double-click the Highlight or Burn tool button



Adjust the exposure value to 100%, the other work mode selection lights, it determines the highlight and deepen to the maximum intensity. Our aim is to divide the channel into Black-and-white.
Note: In the light and deepen the operation must be careful, for some of the contrast is not high, the scope of the small operation can be pressed on the keyboard of the CapsLock key, so that the tool is a cross cursor to display the way? Operation. The shape of the tool head is the shape of the brush.
Small tips: There are four sets of brushes installed in Photoshop that are not installed by default, but have been copied to the brush directory, you can perform the Mount Brush command from the line installation, we will also talk about customized brushes, this shows that the shape of the brush in Photoshop is also important in the use of.
Tip: Most tools use the Caps Lock key to switch the tool icon to the exact cross.

5. Use the brightening and deepening tool repeatedly until the screen shows a strong contrasting black-and-white color. That's why we choose the channel that contrasts the most, and it's easy and doesn't hurt your eyes. Skip to step 8th in this step.



6. You must think of a master figure why not just use black and white to depict it? Of course, but not all of them can be. I can try it on the default R. G b in the channel is not to use. Skip to step 8th in this step.

7. You can also use magic wand to choose, gray-level step changes in the color level is far more than full color level control more, encounter more obscure place, we can use the highlight and deepen the tool to process once again, let black and white step big, then use magic wand tool, according to Gray selection, pay attention to the choice of feather parameters. Let me tell you a little trick: Use the Highlight tool, brush selection that with feather, copy a relatively large channel, in this grayscale, it is easy to lift the object white, and then use magic wand to point to the selected, and then save the fix!

8. While holding down the CTRL key, use the mouse point to take the channel #4, at this time the white Orange area was selected, with the mouse point to take the RGB channel back to normal mode, at this time the original image of the orange has been selected.　　Depending on the situation, we can copy, cut, and move the selected objects to meet our production needs. The second method is in normal mode with the traditional method of the approximate but fast selection, and then save as a channel, select the channel panel to choose the channel to enter the channel editing state, because the channel has a strong editable, so we can use the brush. Paint Bucket tool to the selected area into the processing, with the brush does not meet the requirements, this time reflects the spirit of our graphic master, then we customize the brush, custom-made a few pointed. The shape of a triangle, so that it's easy to refine



Next, use the Lasso tool to draw a pointed shape, do not deselect, with the mouse Point Brush floating Window Triangle menu, click the definition of brush (DINFE BRUSH), then a new brush generated.

You can see the original image by hitting the small eyes on the left side of the channel panel. Now that you have the original panchromatic, you can use a brush, paint bucket, or even a filter to edit the channel as a normal layer until the object you need is precisely pulled out, and the two-pronged approach to the complex graphics is always fixed.

As for the 5.5 version of the Image menu, there is an extra extraction command, mainly a go to the background function, basically is according to the meaning of this article to do, but that can not blame Adobe invasion fan copyright, I do not know his boss, say back to photoshop5.5 function is more and more powerful, you use it?

The concept of a channel:

For "channel", beginners can not only be literal understanding, after all, is translated, it is actually the first layer of meaning is a constituency, or a form of choice, which can be stored, the second layer is when the selection is stored and can be called at any time, The selection of the carrier to be stored in the area is a channel.

We all know that Photoshop has a commonly used qaickmask (quick mask) tool, I think most people have used, and probably most of the use of the feeling is not a second time, in fact it is also a channel, we want to remember, click Qaickmask (Quick Mask) after , a temporary image mask is created, and a temporary alpha channel is generated in the Channel floating window. In other words, a selection area is stored on a channel called Alpha. can be edited in the area, protected outside the constituency. We can store any one of our selections in the operation.

Beginners may default to RGB graphics R. G B Channel There are also doubts, these three channels is actually a relatively special color selection, they are selected in the image of the red pixels. Blue Pixel. Green pixels, because all the colors in the bitmap software are based on these three primary colors. In other words, the three primary-color channels actually indicate the distribution of RGB in every inch of the image.

Tips: You can rgb three kinds of channels, using a blur filter, and then back to the full color map of the use of light filters, texture channels to choose to use that has been blurred channel, the final effect is such a streamer, very cool.

The channel is highly editable, color selection, lasso selection, brush and so on can change the channel, can almost take the channel as a bitmap to deal with, but also to achieve the intersection of different channels, superposition, subtraction action to achieve the desired selection of the precise control. When you select a channel, the palette and the Swatch will turn into Black-and-white gray-scale, black and white can be deleted and the selection, and the unique is gray, Gray created a translucent area, because the gray has a level of 253 degrees, you can make up the color gradient, so you can create a gradient transparent effect, which in some ways is useful, When you do not want to change the transparency of the whole layer, you can use the channel and can edit the channel into any shape, and then use the gradient tool to fill in the grayscale gradient, then the selection of this channel will have a gradient transparent properties, you can go to the selection of any graphics, will be gradually transparent.

When beginners begin to touch Photoshop, often just select-Filter-then select-and then filter, very few people will use the channel to store the status of the selection in the beginning, this is a difficult problem that the meaning of the channel often becomes the novice user later, although they can make some good graphics with Photoshop. It is not possible for a constituency to turn off the image and call it again before it is stored without a channel, as some three-dimensional effects can only be achieved by precisely controlling the light source and shadow, and it is inconceivable that you want to have precise control without using the channel to store your selections. So to understand the concept of the channel is a beginner into the hall of the second stage of the graphic, the first step is certainly a layer of concept, about the layer of articles are also many, here will not say more.