Inspiring

Answered

Scripting. get the number of pixels in the alpha channel of an image layer ?

Forum|Forum|3 years ago
April 4, 2022
4 replies
885 views

Hi guys.

Someone tell me how I can get the number of pixels in the alpha channel of an image layer ?

Actions and scripting

This topic has been closed for replies.

Correct answer r-bin

Algorithm (the hint).

Turn the transparency channel into a selection (ctrl+click on layer )

Save it to new alpha channel.

Select only this alpha channel.

Read the document's histogram value at index 255.

R

r-binCorrect answer

Legend

Algorithm (the hint).

Turn the transparency channel into a selection (ctrl+click on layer )

Save it to new alpha channel.

Select only this alpha channel.

Read the document's histogram value at index 255.

A

AnyONAuthor

Inspiring

Thank you, r-bin...

Kukurykus

Legend

That seems to be solution - mark it as correct answer if you think so 😉

Kukurykus

Legend

While you're back to forum, was the answer given in Photoshop Scripting. How to put each closed path on a separate Path layer ? that you were looking for?

A

AnyONAuthor

Inspiring

Yes, I already use this knowledge.

Kukurykus

Legend

How to check if a layer contains any transparent pixels?

A

AnyONAuthor

Inspiring

Someone tell me how can I get the number of pixels in the alpha channel of an image layer whose transparency value is 0.

Sorry///

Stephen Marsh

Community Expert

More information is required, ideally you can attach samples. Black, white or shades of grey?

I think that I recall a script for how many pixels in an irregular selection and one can load an alpha as selection...

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