PS-Pull Tutorial by calculating the channel to dig out the complex branches

Tutorial to learn how to use Photoshop Channel and calculation commands to pull out complex objects, in addition to the color Range command processing, the result of comparison or channel method better, let's learn from the following.

Effect Chart:

First open the tree branch picture

Copy the background layer, we see a lot of branches, if the use of pen buckle can put your hand tired cramp, with magic wand may not be able to buckle clean, we use the channel to try, go to the channel panel.

We chose the blue channel, because the branches and the background contrast is quite large.

Image > Calculation commands.

Set as follows.

Generate a new channel ALPHA1, the effect is as follows.

At present the contrast is not obvious enough, we apply the calculation command again, blending mode to overlay.

Generate channel ALPHA2, the effect is as follows.

We see that there are some gray areas at the top of the screen, we use the color order to deal with, ctrl+l shortcut keys.

Now the picture is black and white, we want the effect, we want to separate the branches out of the ctrl+i, the branches of the part of the red.

Press CTRL to click on the alpha2 thumbnail and pull up the white tree selection and return to the Layers panel.

Click the icon in the red box to add a mask, then hide the background, enlarge the display, the effect is as follows.

We'll find some branches still left some background blue, first Ctrl+g group layer 1, then the bottom of the new Layer 2, fill white, select Group 1, bring up the mask selection.

Select > Modify > Shrink 1 pixels.

Click Add Mask button.

But the finer branches still have blue residue, and we add a hue/saturation adjustment layer to reduce the saturation of the blue channel.

The same method handles the Cyan channel.

After this series of steps, the branches to pull out the effect is good, the final effect is as follows.

In addition, I directly with the Color Range command processing, get the selection ctrl+j copy a layer, the remaining steps are the same, the effect or channel method better, this PS tutorial ends.

Final effect!