[Gimp-user] Wronr reading of 16 bit tiff
>You could also try scanning as PNG, and see if that works. > >Liam (slave ankh on IRC) Afaik, only linear response (raw) mode supported by vuescan is tiff. -- AndyJP (via www.gimpusers.com/forums) ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
Re: [Gimp-user] Wronr reading of 16 bit tiff
On Wed, 2019-08-14 at 07:04 +0200, AndyJP wrote: > I try scanning to 48bit (16 bit per channel) TIFF You could also try scanning as PNG, and see if that works. Liam (slave ankh on IRC) -- Liam Quin - web slave for https://www.fromoldbooks.org/ Click here to have the slave beaten. Ask about courses on CSS, XSLT, DocBook, XProc ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
Re: [Gimp-user] Wronr reading of 16 bit tiff
Hi Andy, please open an issue in the Gimp issue tracker and attach an example file: https://gitlab.gnome.org/GNOME/gimp/issues Some scanners create 4-channel/12bit encodedimages. Then the 4th channel is an IR channel that is useful for reducing dust. Regards, Tobias Am Mi., 14. Aug. 2019 um 07:04 Uhr schrieb AndyJP : > I try scanning to 48bit (16 bit per channel) TIFF with VueScan, but GIMP > reads > it wrong, forwarding the data partially to alpha-channel. Probably, it is > interpreting 3-channel/16bit image as 4-channel/12bit encoded. > If not, I have no Idea where that 4-th alpha channel comes from (it is not > blank, but filled with some ghost from original image). So probably other > channels are also damaged. > > There are also error messages appear: > "Incompatible type for 'RichTIFFIPTC'; tag ignored" > and > "Alpha channel type not defined for file C:\...\.tiff. Assuming alpha is > not > premultiplied." > > Is there a way to read 3-channel 48-bit TIFFs to GIMP correctly? > > -- > AndyJP (via www.gimpusers.com/forums) > ___ > gimp-user-list mailing list > List address:gimp-user-list@gnome.org > List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list > List archives: https://mail.gnome.org/archives/gimp-user-list > ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
[Gimp-user] Wronr reading of 16 bit tiff
I try scanning to 48bit (16 bit per channel) TIFF with VueScan, but GIMP reads it wrong, forwarding the data partially to alpha-channel. Probably, it is interpreting 3-channel/16bit image as 4-channel/12bit encoded. If not, I have no Idea where that 4-th alpha channel comes from (it is not blank, but filled with some ghost from original image). So probably other channels are also damaged. There are also error messages appear: "Incompatible type for 'RichTIFFIPTC'; tag ignored" and "Alpha channel type not defined for file C:\...\.tiff. Assuming alpha is not premultiplied." Is there a way to read 3-channel 48-bit TIFFs to GIMP correctly? -- AndyJP (via www.gimpusers.com/forums) ___ gimp-user-list mailing list List address:gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
