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NecmiKara
Joined: 01 Aug 2010
Posts: 3
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 Posted: Sun Aug 01, 2010 5:27 am Post subject: Take the diff to create a transparent mask |
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Hi all,
I want to take the difference between two images in order to create a transparent image.
I try to find "diff" such as:
+
=
Here, background is a classical #545459 filled rectangle. I want a transparent diff image so that I can use another classical picture (rather than #545459 rectangle) and obtain the same kind of header. In other words, I would like to find a not transparent gradient that results on header.png when overlayed to a #545459 rectangle. |
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hawkeye
Joined: 14 May 2009
Posts: 2377
Location: Mesa, Az
OS: Windows 7 Pro 64 bit
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| Posted: Sun Aug 01, 2010 10:21 am Post subject: |
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I have no idea what you trying to do. Perhaps you could explain more clearly. What is a transparent diff image?
Are you sying you want the question mark to be a gradient which shows on top of the rectangle? |
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NecmiKara
Joined: 01 Aug 2010
Posts: 3
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| Posted: Sun Aug 01, 2010 11:09 am Post subject: |
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Yes the question mark would be a gradient and when it overlay on a #545459 filled rectangle, the overlaid result will be similar to header.png. And as I want it to overlay, it must be transparent (i mean not completely opaque) |
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hawkeye
Joined: 14 May 2009
Posts: 2377
Location: Mesa, Az
OS: Windows 7 Pro 64 bit
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| Posted: Sun Aug 01, 2010 11:19 am Post subject: |
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Place the question mark on a layer above the rectangle layer. Ctrl+click the question mark layer to select. Fill the selection with a gradient. Lower the layer opacity to get the degree of transpareny you want. |
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NecmiKara
Joined: 01 Aug 2010
Posts: 3
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| Posted: Sun Aug 01, 2010 11:59 am Post subject: |
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I think I didn't explain well, sorry my english is not so good and I am more mathematician than designer. The question mark is not exactly the "diff" titled image. I put a question mark to show that this is the unknown result (like a "x" in a math equation). I think the difference you said is what I am looking for but I would like to get it in a new rectangle layer but not exactly in a question mark or something.
Thanks. |
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