How to change white to transparent in photoshop

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shvedovka2012-09-03 18:15:55

PNG

shvedovka, 2012-09-03 18:15:55

Dear %username%,

Imagine a scan of a crumpled sheet. So, you need to make a png with an alpha channel, so that it has only dents on it.

That is, it is necessary at least to replace white with transparent, but it is better to leave the difference between a flat and crumpled sheet altogether.

The result should be a png file that I could overlay on top of other documents.

UPD: Thanks sumnix
Original:

Result:

Example:

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8 answer(s)

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sumnix, 2012-09-03
@shvedovka

- Add an empty mask to your layer;
- do Apply Image ... on this mask - set Merged, Green, Multiply, 100% - ok;
- apply curves / curves on the resulting mask, adjusting to the level of transparency from your task (the darker the mask, the more transparent).
Everything, you can put a background for greater clarity.

R

Roman, 2012-09-03
@WNeZRoS

In Photoshop, you can select a color range (in the Selection menu), choose white color there and play with the sliders until the desired result. Then delete what stands out.

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Vitaly Zheltyakov, 2012-09-04
@VitaZheltyakov

That's exactly why I use Gimp - there it is done with one command "Color to Alpha Channel".

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s0rr0w, 2012-09-03
@s0rr0w

I used English photoshop, so the Russian translation may not be accurate
1. Open the file
2. If it was a picture, then first do Ctrl + A, Ctrl + X, Ctrl + V
3. Ctrl + A
4. In the layer control dock on layer Layer 1 create a Clipping Mask (below the button where to create a new layer, delete the layer)
5. Open the channel control dock Window> Channels
6. It will have 4 layers + our mask
7. Select the most contrasting layer, for example Red, turn off the rest
8 Make this layer Ctrl+A, Ctrl+C
9. Turn on all layers, make our mask active, Ctrl+V
10. Edit the brightness, contrast, levels on this mask, achieving the most acceptable result.

D

DibrovLALALA, 2012-09-03
@DibrovLALALA

Sharpen up to make the dents more black, and then add a general transparency. Not suitable?

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d43, 2012-09-03
@d43

If you overlay again in Photoshop, then just set the layer with crumpled paper to Blending: Multiply ( for example ).

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gaelpa, 2012-09-03
@gaelpa

Google -> "photoshop wrinkled paper effect":
1. www.lersus.de/res/modules/rus/photoshop/4/content/content9.html simple recipe consisting of layering in "Multiply" mode with paper opacity set to 55 %.

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Vitali Borovik, 2012-09-03
@WAYS

Maybe it makes sense to recognize the text?