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Delete to transparency

This discussion is connected to the gimp-user-list.gnome.org mailing list which is provided by the GIMP developers and not related to gimpusers.com.

This is a read-only list on gimpusers.com so this discussion thread is read-only, too.

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Delete to transparency vilmax 09 Jun 12:56
  Delete to transparency Simon Budig 09 Jun 12:59
  Delete to transparency Leon Brooks 09 Jun 13:03
   Delete to transparency vilmax 09 Jun 14:24
vilmax
2009-06-09 12:56:04 UTC (over 15 years ago)
postings
2

Delete to transparency

Hi,
I'm a newbie to Gimp and I wonder if some of the users can help me out. At my flickr site
http://www.flickr.com/photos/the-real-james-bond/3610598846/ i have a merged image made of a group of 4 shots of a rider jumping a gap. I did this in a round about fashion which took a lot of time. Can any one tell me or point me in the direction of a tute to do this in a more accomplished way.

Just a side note to my reference in the subject line, when i opened the images to layers, i found that the inverse selection I did "to delete everything but the rider", did not delete to transparent but rather to white, which I then "convert colour to alpha". i was under the impression that the I could delete to transparency, and despite my best efforts I could not get it work.
I'm all ears.. very happy to be shown. Thanks in advance

Simon Budig
2009-06-09 12:59:03 UTC (over 15 years ago)

Delete to transparency

Theo M (forums@gimpusers.com) wrote:

Just a side note to my reference in the subject line, when i opened the images to layers, i found that the inverse selection I did "to delete everything but the rider", did not delete to transparent but rather to white, which I then "convert colour to alpha". i was under the impression that the I could delete to transparency, and despite my best efforts I could not get it work.

If the layer name in the layers dialog is printet fat the layer does not contain an alpha channel. You should add it via the context menu, then you'll delete towards transparency.

Hope this helps, Simon

Leon Brooks
2009-06-09 13:03:00 UTC (over 15 years ago)

Delete to transparency

On Tuesday 09 June 2009 18:56:04 Theo M wrote:

was under the impression that the I could delete to transparency, and despite my best efforts I could not get it work.

If you imported the image or layer from a JPeG (.jpg) file, it will not have an alpha property for that layer.

Use menu: Layer / Transparency / Add alpha channel

Delete will then (by default) make the deleted section transparent.

When you save back to a JPeG, GIMP will paint the background (of the saved image only) white.

Save into an XCF file to retain all of the layers, transparency, etc.

Cheers; Leon

vilmax
2009-06-09 14:24:07 UTC (over 15 years ago)
postings
2

Delete to transparency

On Tuesday 09 June 2009 18:56:04 Theo M wrote:

was under the impression that the I could delete to transparency, and despite my best efforts I could not get it work.

If you imported the image or layer from a JPeG (.jpg) file, it will not have an alpha property for that layer.

Use menu: Layer / Transparency / Add alpha channel

Delete will then (by default) make the deleted section transparent.

When you save back to a JPeG, GIMP will paint the background (of the saved image only) white.

Save into an XCF file to retain all of the layers, transparency, etc.

Cheers; Leon

Thanks Leon, I tried your recommendation and it works well. Originally when i imported as layers the .jpg files, the channels had alpha as well as RGB and that's were the confusion on my part was. is there a way to select the all the imported layers and reapply the alpha channel, or do i have to apply them individually?