transparency

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transparency

by Norman Silverstone :: Rate this Message:

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I have a photograph of a black hexagon on a white background and I would
like to make the background transparent so that I can lay this onto
another image. I have tried and not made much progress and would be
grateful if some kind person could please point me in the right
direction.

Norman

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Re: transparency

by David Gowers :: Rate this Message:

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Hi Norman,

On Sun, Apr 27, 2008 at 6:47 PM, norman <norman@...> wrote:
> I have a photograph of a black hexagon on a white background and I would
>  like to make the background transparent so that I can lay this onto
>  another image. I have tried and not made much progress and would be
>  grateful if some kind person could please point me in the right
>  direction.

'Color to Alpha' should do what you want. In the layers->transparency menu IIRC.

>
>  Norman
>
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Re: transparency

by Jon Cosby :: Rate this Message:

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norman wrote:
> I have a photograph of a black hexagon on a white background and I would
> like to make the background transparent so that I can lay this onto
> another image. I have tried and not made much progress and would be
> grateful if some kind person could please point me in the right
> direction.
>
> Norman
>


Convert the image to RGB mode if it's not already. Select the white
region by color. In the Layer -> Transparency menu, add an alpha
channel. In the same menu, set "Color to alpha". This should make the
white background to transparent.


Jon
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Re: transparency

by Norman Silverstone :: Rate this Message:

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> Convert the image to RGB mode if it's not already. Select the white
> region by color. In the Layer -> Transparency menu, add an alpha
> channel. In the same menu, set "Color to alpha". This should make the
> white background to transparent.

Thank you very much.

Norman

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Re: transparency

by Norman Silverstone :: Rate this Message:

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> Convert the image to RGB mode if it's not already. Select the white
> region by color. In the Layer -> Transparency menu, add an alpha
> channel. In the same menu, set "Color to alpha". This should make the
> white background to transparent.

I selected the white region by colour and in the Layer-> Transparency
menu added an alpha channel. However, the set Colour to Alpha setting
remained greyed out of action. What have I missed, please?

Norman

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Re: transparency

by Bugzilla from daniel.hornung@gmx.de :: Rate this Message:

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> > Convert the image to RGB mode if it's not already.

> However, the set Colour to Alpha setting
> remained greyed out of action. What have I missed, please?
>
> Norman

Are you in RGB mode?  You can check it in Image->Mode.

Daniel


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Re: transparency

by subverted :: Rate this Message:

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Like he said, changed it to RGB if it's not already. in the layers toolbox, right click on the layer and in the menu that comes up click "add alpha channel". Then use the eraser tool on the area you want erased just to see if it works.

On Sun, Apr 27, 2008 at 12:01 PM, norman <norman@...> wrote:

> Convert the image to RGB mode if it's not already. Select the white
> region by color. In the Layer -> Transparency menu, add an alpha
> channel. In the same menu, set "Color to alpha". This should make the
> white background to transparent.

I selected the white region by colour and in the Layer-> Transparency
menu added an alpha channel. However, the set Colour to Alpha setting
remained greyed out of action. What have I missed, please?

Norman

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Re: transparency

by Norman Silverstone :: Rate this Message:

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> Are you in RGB mode?  You can check it in Image->Mode.

No, changed to RGB, problem solved, thank you.

Norman

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