[Gimp-user] How to remove alpha channel?
For some Latex application, I have to crop some image. I load a tiff into GIMP. It will be one gray channel only. I copy some part of the image and include it as a new image. This new image has, unfortunately for me, been added an alpha channel. There seem to be no way to remove the alpha channel or, as an alternative, to store a tiff without alpha channel. Simply spoken: I do not want alpha channels in my tiffs. Thanks for a hint. Joerg Bergmann ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Bits per channel
Am Dienstag, den 29.09.2009, 11:48 +0530 schrieb phanisvara das: > On Tuesday 29 September 2009 07:06:52 am Phil Labonte wrote: > > have looked online on the Gimp site and I am not clear if Gimp > > supports 16 or 24 or 32 bit images? > > as far as i know, GIMP processes colors with 16 bit precision when "use GEGL" > is > enabled from the "colors" menu. work is in progress to make it possible to > fully > support opening & saving of 16 bit (or higher?) images. > Wrong. GEGL uses 32 bit floating point numbers, that gives 128 bit per coloured pixel (with alpha channel). Using 16 bit integers, the maximum intensity of a color channel is 0x. This may lead to temporarily color cropping during multi-step operations, even if the final channel intensity is below 0x. By using floating point numbers, no temorarily cropping will occur. Joerg ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] Problems with generated transparencies
I use the actual Fedora 11 version of GIMP. I have problems while generating partially transparency in images. I have an image containing white background and some light-blue, unsaturated details. I do the following steps: 1. Add transparency 2. color (white) to transparency 3. transparency threshold 1+2 seem to go OK, but step 3 makes the blue colors fully-saturated plus very dark. At the moment, I did this task using gifsicle, GIMP seems to be unusable for that. Any hints? Joerg ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
