Use PS channel to background dense tree branches

This tutorial uses the application channel combined with the use of masks to create a dense tree background. It can be easily completed in a few steps. Let’s take a look at the production process.
Original picture
final renderings

1. Open the original image, enter the channel panel, and view the channel window.

Find the channel with the greatest contrast between the sky and others, and find that it is the blue channel;

3. Drag the blue channel to the button to create a new channel and copy the blue channel;

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4. You can use "Brightness/Contrast" to increase the contrast. Click Image-Adjustment-Brightness/Contrast. The darker the parts you want, the better, and the whiter the parts you don't want, the better;

5. Then return to the layer, click "Load Selection" under the "Select" menu, pay attention to the channel options, select the blue copy, and check Invert.

When the selection area appears, I click directly to add a layer mask, and the image deduction effect is as follows:

Finally, we add a background and the basic work is over.