Eraser question

[Eurgail]

So "Channel To Selection" should take into account transparency. I will change that.
Martin

Take or not take?

What do I have to do to reproduce that? Can you send as a small sample PLD?
Martin

Done via e-mail.

[Martin Huber]

So "Channel To Selection" should take into account transparency. I will change that.
Martin

Take or not take?

Take. It's the same with adjustment layers and layer masks.

Martin

[Eurgail]

Ah, ok, so it works the same way as in the channels panel if all channels are marked? Like jw2004 wished...
I just misunderstood the meaning of your phrase.

[jw2004]

(...)
3.channel to selection
(...)
Do you think the selection is what I want?
Obviously, the selection is useless for me.

So "Channel To Selection" should take into account transparency. I will change that.

In fact, the hidden color information interference many function, for example, the histogram still stat the transparent pixel, the result obviously is not good for me.

It's so as Eurgail said: the Histogram doesn't show transparent pixels.

Martin

select colors function also exists this issue.

[jw2004]

I think that account the channel option and background color when use eraser tool is meaningful.
It will not change existing behavior but make PL more flexible.

[Hoogo]

The eraser tool is not the only tool that can create full transparency.
So I guess you will need a separate function to empty transparency, no matter how it was created.
Maybe an action will already do?

[jw2004]

The eraser tool is not the only tool that can create full transparency.
So I guess you will need a separate function to empty transparency, no matter how it was created.
Maybe an action will already do?

No matter how to handle transparence, some function should consider the transparence, such as channel to selection, select colors and so on.
After think over, I think that it is unnecessary to fully delete the pixel like PS, we can do better than only set the A to 0, but can control the R,G,B value at same time ( PL has the channel option when use eraser tool, but the option is useless, regardless of the channel setting, PL just set pixel's A value to 0, R,G,B value were untouched.

[jw2004]

PL can't directly create a fully transparent( A = 0) pixel with brush tool, and can create indirectly with eraser tool.
Maybe it's possible to do it with eraser tool if eraser tool support channel option and color setting.
Since PL support a fully transparent pixel with R,G,B value(opposite to Photoshop), why not support using eraser tool to create those pixels same as using brush tool to create normal pixels?
This will make PL's theoretical system more complete.

[Martin Huber]

The eraser tool is not the only tool that can create full transparency.
So I guess you will need a separate function to empty transparency, no matter how it was created.
Maybe an action will already do?

Burkhard already explained why clearing the color data at fully transparent pixels wouldn't solve the problem. Pixels with up to 99.999% transparency will still contain the color data. So if you are creating a mask solely based on the color values, the mask will have a hard edge where transparency reaches 100%.

Martin