Re: [Gimp-user] Advice on oddly-coloured images
On 05/29/2011 10:40 AM, Christopher Dawkins wrote: Please excuse a non-GIMP query, but I have been a GIMP user (an inexpert one) since the last century and this is the only graphics-related list I am on. My query is on http://archives.felsted.org/pdfprob/ The problem is that images obtained from a Quark pdf with pdf2html appear in silly (approximately negative) colours, and I need a scriptable method to restore them. Couldn't that be a problem of CYMK-RGB mixup by pdf2html? Or the images from pdf2html are actually JPEG in CYMK mode, and that mode is overlooked by the software you use to view the results, in which case you would just need a utility to convert CYMK JPEG to RGB (ImageMagick will likely do it). ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Advice on oddly-coloured images
My query is on http://archives.felsted.org/pdfprob/ Couldn't that be a problem of CYMK-RGB mixup by pdf2html? Or the images from pdf2html are actually JPEG in CYMK mode, and that mode is overlooked by the software you use to view the results, in which case you would just need a utility to convert CYMK JPEG to RGB (ImageMagick will likely do it). Bingo! Bang on the nail! Very many thanks for this diagnosis. Just found and tried the 'identify -v ' command and it reports 'Colorspace CMYK'. More difficult, at the moment, is to convert it. All variations on -colorspace fail to have any effect (on IM 6.6.3-10), and -profile appears to be unrecognised. On GIMP there is a 'Rearrange colormap' but it's greyed out: presumably the jpg has no colormap. I'll plough on through Google (I have only FreeBSD and Ubuntu machines). -- Christopher Dawkins Garnetts Corner, Braintree Road, Felsted, Dunmow, Essex CM6 3DS c...@e-mjd.com 07816 821659 01371 821076 ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Advice on oddly-coloured images
On Sun, 29 May 2011 14:26:17 +0100 (BST), Christopher Dawkins wrote: More difficult, at the moment, is to convert it. All variations on -colorspace fail to have any effect (on IM 6.6.3-10), and -profile appears to be unrecognised. On GIMP there is a 'Rearrange colormap' but it's greyed out: presumably the jpg has no colormap. If you open and save with GIMP, it should be enough, since GIMP doesn't support CMYK. -- Jernej Simončič http://eternallybored.org/ ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
