Just Look up the Final Image of Seprating Image Background Using Photoshop.

Seprating Image Background

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You can find a lot of tutorials how to separate complex objects from the background. But I would like to invite your attention to another one unique simple tutorial how to achieve the desired effect in just a few steps. I got this method by experimenting.
In the beginning you should find some appropriate picture to work with. You can use Google Images or also feel free to use mine picture. Open up the picture and start with tutorial.
Seprating Image Background

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Apply Filter > Extract with similar settings to these:
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This is where we start to extract the image first of all zoom into the image with Zoom Tool so you can clearly see the outline and set the brush size to a suitable size and then simply draw around the outline of the woman’s hairstyle with Edge Highlighter Tool. If you made wrong line, you can remove it with Eraser Tool. Now fill in the area which you want extracting to do this select the Fill Tool on the left hand toolbar and simply click inside of the drawn outline.
Seprating Image Background

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Now press OK in the top right of the window and you should go back to the normal Photoshop window, and if you did the last steps correctly you will have an image without a background, if all done correct the edges will look fine, if not then you may find some discrepancies which can simply be erased.
Seprating Image Background

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After that create a new layer under and fill it with color of #aed2da.
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Now we can see that we have some defects on woman’s hair. It is not a big problem, just get out the Eraser Tool and select one of standard brushes from Photoshop palette:
Separating Image Background

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Reduce brush size to 25 pixels and process areas where you can see visible defects.
Separating Image Background

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Now, move to the next step. After processing problem areas with Eraser Tool we may have not so clear image parts, for example like we have from the left and right parts. For removing this problem select the Smudge Tool (Brush: 2 px, Mode: Darken, Stregth: 95%) and add a few strokes as shown on the picture below:
Separating Image Background