Antialiasing with alpha channel

TJ
Posted By
Tomasz J
May 2, 2007
Views
732
Replies
4
Status
Closed
Hello,

Could someone advice how to create a PNG image, with transparent background and anti-aliasing in alpha channel only? I mean, an image with edges nicely blending with any background.

Is it possible with Photoshop at all?

Thank you for any pointers,

Tomasz J
Related Tags
alpha anti-aliasing channel

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J
jaSPAMc
May 2, 2007
On Wed, 2 May 2007 15:39:42 +0200, "Tomasz J" found these unused words floating about:

Hello,

Could someone advice how to create a PNG image, with transparent background and anti-aliasing in alpha channel only? I mean, an image with edges nicely blending with any background.

Is it possible with Photoshop at all?

Thank you for any pointers,

Tomasz J
The query should be:
Is it possible at all?

No.

To blend you must have the item to be blended with.

The ‘effect’ can be achieved with sharp edges, but not ‘blending’.
T
Tacit
May 2, 2007
In article ,
Sir F. A. Rien wrote:

The query should be:
Is it possible at all?

No.

To blend you must have the item to be blended with.

The ‘effect’ can be achieved with sharp edges, but not ‘blending’.

False.

A 24-bit PNG supports full eight-bit transparency. The transparency is controlled by the alpha channel. A 24-bit PNG can have antialiased, translucent edges.

There are two ways to do this. The first is simply to create the image transparently in Photoshop using layers; if the edges of the image are antialiased, the PNG will have antialiasing in the transparency.

The second is to create an alpha channel with antialiased edges (all the Photoshop selection tools can create antialiased edges) and use the alpha channel for the PNG transparency.

—
Photography, kink, polyamory, shareware, and more: all at http://www.xeromag.com/franklin.html
TJ
Tomasz J
May 3, 2007
Thank you. Did you actually mean 32-bit PNG?
Tomasz J

"tacit" wrote in message
In article ,
Sir F. A. Rien wrote:

The query should be:
Is it possible at all?

No.

To blend you must have the item to be blended with.

The ‘effect’ can be achieved with sharp edges, but not ‘blending’.

False.

A 24-bit PNG supports full eight-bit transparency. The transparency is controlled by the alpha channel. A 24-bit PNG can have antialiased, translucent edges.

There are two ways to do this. The first is simply to create the image transparently in Photoshop using layers; if the edges of the image are antialiased, the PNG will have antialiasing in the transparency.
The second is to create an alpha channel with antialiased edges (all the Photoshop selection tools can create antialiased edges) and use the alpha channel for the PNG transparency.

—
Photography, kink, polyamory, shareware, and more: all at http://www.xeromag.com/franklin.html
T
Tacit
May 6, 2007
In article <f1c5tg$kbk$>,
"Tomasz J" wrote:

Thank you. Did you actually mean 32-bit PNG?

PNGs with alpha transparency are referred to in Save for Web as "24-bit," even though technically they are 32-bit (RGBA) files.

—
Photography, kink, polyamory, shareware, and more: all at http://www.xeromag.com/franklin.html

How to Improve Photoshop Performance

Learn how to optimize Photoshop for maximum speed, troubleshoot common issues, and keep your projects organized so that you can work faster than ever before!

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