Concept: Adobe Photoshop comes up with different types of selection techniques out of which quick mask mode is one of the most sophisticated advance techniques used for minute selections. Here in this lessons particularly, when you are in quick mask mode you paint over the image and the painted portion is converted into selection. You need to use different size of brush to paint over the minute small areas of the image that you wish to select.
1. Quick mask mode is a powerful way
of selection in Photoshop. It is a selection based on the masking
of the desired portion of an image. It is used for minute and accurate
selections.
2. Start with opening an image with a multicolored
background. Scenery will be the perfect example for background.

3. At the bottom of the Toolbox you will find the
switches. Green marked button is for " Edit in Standard Mode"
And red marked button is for "Edit in Quick Mask Mode"

4. Before starting with the tutorials, double click
on quick mask mode. Select "Selected Areas" Keep the red
color or you can change it. Default opacity is 50%. Make it 70 %
if you want more dark color for selection. Click OK to close the
dialog box.

Click on the "Edit in Standard Mode" button
to start with the tutorial.
5. Select Magic Wand tool with 32 Tolerance. Click
on the face of the image or click on the area you want to select.
You can select maximum area by pressing Shift and clicking magic
wand tool.

6. Click "quick Mask Mode". The portion
of the image which was selected with magic wand will turn into red
color with 70% opacity.

7. Select paint brush with hard edge. The size of
the brush depends upon the area you are going to paint or mask.
For minute areas, the small sized brush is advisable. Keep black
color as foreground and start painting the area you want to select.
8. If by mistake you painted something out of limit,
turn white as foregoing and erase the red color with the same brush.
9. Use different size of brushes and zoom the image
to paint minutely.

10. When you will finish with painting, click "Edit
in Standard Mode" button. Red color will be replaced by normal
selection.

11. You can apply any filter or effect on the selected
area or you can use it for retouching. In the following image we
have desaturated the selected area with
Image > Adjust > Desaturate

12. Or you can just drag the selection with move tool
on another file to get the selection without background and place
it on the new background.

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