There are now a lot of articles on how to separate hair and change the background in Photoshop with different ways such as Select and Mask or use Plug in support.

However, in the last few years it has not been supported on new versions of Photoshop and developers have not updated it, so it has been almost forgotten.

In addition to the above methods, today I will guide in detail how to separate hair with Panel Channel (color channel).

This method works best in the RGB color system. So the first thing to do is convert this image to RGB.

If you’re new to Photoshop, check out some of my newbie articles:

Note: You can only use this method when the background behind the subject is a single color and does not match the hair color. For example this image:

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Convert image to RGB

After opening the image (Ctrl + O), go to the Image menu > Mode. If it’s in RGB color then you don’t need to do anything else.

Otherwise you choose RGB color if it is in another color system like CMYK or Indexed Color.

Some images you cannot edit when downloaded are because they are in Indexed Color, you switch to < strong>RGB or CMYK is fine.

separate and change Photoshop background

Make a selection of objects in Chanel

What is a selection? Very simply, a selection is the part of the image that is currently selected so that when a tool is applied, it only affects that area.

Open the Channel panel, if you can’t find it, go to the Window menu and select Channel.

image 214

Click on each color channel, you see which color channel is the darkest, then drag it to the page icon below to copy it out.

image 215

Dùng công cụ Brush với màu đen và Hardness khoảng 40% vẽ lên layer vừa copy này.

image 216

After drawing, we get a black layer like this, then hold down the Ctrl key and click on the image box in the layer you just blacked out.

separate and change Photoshop background

So that’s the step of creating a selection for the object, let’s move on to the next step.

Create a mask for the object

Click on the RGB Channel at the top, then return to the Layers panel (F7).

Hold down Alt and click the Add a Mask.


separate and change Photoshop background

The thumbnail next to the main layer is called a mask. In image masking, black represents loss of image, white represents visible.

The black part of the mask is the deleted part of the main image.

Tạo mặt nạ (Mask) cho đối tượng

Thành quả đạt được:

Tạo mặt nạ (Mask) cho đối tượng

Click on the New Layer icon, then drag this layer below the girl layer and fill it with the Paint Bucket Tool (G) red.

Create mask (Mask) for object

At this point, all the defects in the girl’s hair will appear.

separate and change Photoshop background

Select the mask of the girl layer, press Ctrl + L to open the Levels dialog box.

In the Input Levels section, drag the middle button to the right, the right button to the left, then give the girl’s hair the best results

image 234

To handle the white part around the girl’s hair, do the following:

Press Ctrl + J to duplicate the layer in the same window. Select the layer below and set the blend mode to Multiply.

image 235

Chọn vào mặt nạ của layer ở trên

image 236

Use the Brush tool with the following settings:

  • Color: black
  • Hardness: 0%
  • Opacity: 50%

Carefully draw on the white part of the girl’s hair, the white part will be erased.

image 244

Change the background (composite) for the object

Find a nice and reasonable background image, open it in another window. Hold Ctrl and select both layers. Right click on the layer name, select Duplicate Layer.

Change background ( montage) for the object

In the Document section, choose the name of the background image you just opened.

Change background ( montage) for the object

Switch to the “background image” window, click on the layer link icon (chain) to lock these 2 layers together.

Change background ( montage) for the object

Use Ctrl + T to resize the image and move it appropriately.

image 243 e1585564898658


End of the tutorial on how to separate sideburns and change the background in Photoshop here, it’s too easy, isn’t it.

It looks a bit long, but it only takes a few steps, and if you practice once or twice, you’ll remember it.

A little knowledge hope to help you in your journey self-study Photoshop.

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