From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1PtgE6-000874-AQ for garchives@archives.gentoo.org; Sun, 27 Feb 2011 12:59:54 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id EAA921C036; Sun, 27 Feb 2011 12:56:38 +0000 (UTC) Received: from smtp.gentoo.org (smtp.gentoo.org [140.211.166.183]) by pigeon.gentoo.org (Postfix) with ESMTP id BC8B51C036 for ; Sun, 27 Feb 2011 12:56:38 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp.gentoo.org (Postfix) with ESMTP id 4E8031B409E for ; Sun, 27 Feb 2011 12:56:38 +0000 (UTC) X-Virus-Scanned: by amavisd-new using ClamAV at gentoo.org X-Spam-Score: -0.326 X-Spam-Level: X-Spam-Status: No, score=-0.326 required=5.5 tests=[AWL=0.365, BAYES_00=-2.599, RCVD_ILLEGAL_IP=1.908] Received: from smtp.gentoo.org ([127.0.0.1]) by localhost (smtp.gentoo.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id iJxgQ2GMUS+J for ; Sun, 27 Feb 2011 12:56:31 +0000 (UTC) Received: from lo.gmane.org (lo.gmane.org [80.91.229.12]) by smtp.gentoo.org (Postfix) with ESMTP id AC8861B4185 for ; Sun, 27 Feb 2011 12:56:31 +0000 (UTC) Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1PtgAl-000238-BF for gentoo-user@gentoo.org; Sun, 27 Feb 2011 13:56:27 +0100 Received: from bl22-126-71.dsl.telepac.pt ([2.83.126.71]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 27 Feb 2011 13:56:27 +0100 Received: from nunojsilva by bl22-126-71.dsl.telepac.pt with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Sun, 27 Feb 2011 13:56:27 +0100 X-Injected-Via-Gmane: http://gmane.org/ To: gentoo-user@lists.gentoo.org From: nunojsilva@ist.utl.pt (Nuno J. Silva) Subject: [gentoo-user] Re: PDF: convert to grayscale Date: Sun, 27 Feb 2011 12:59:42 +0000 Message-ID: <8762s5fxa9.fsf@ist.utl.pt> References: <87ipwuiqjr.fsf@ist.utl.pt> Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: bl22-126-71.dsl.telepac.pt User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.2 (gnu/linux) Cancel-Lock: sha1:VzUvFwzksL1wKNmYuz5CpchPbwc= X-Archives-Salt: X-Archives-Hash: fb455dd13adcb37187b19c7f8170a219 Paul Hartman writes: > On Tue, Feb 8, 2011 at 7:50 AM, Nuno J. Silva wrote: >> Does anyone know a tool (other than ghostscript) that is able to convert >> a PDF (or postscript) to grayscale? >> >> Ghostscript does this, but is unable to convert gradients and fills >> (they're replaced by bitmaps) which results in a too big file unless I >> drastically reduce quality. > > Are you the creator of the document and want to save the original as > greyscale, or you want to convert an already existing PDF? All I have are PDFs, without any original file. > If the latter I think the easy way is to use ghostscript (pdf2ps) to > render it as greyscale postscript. Then you could convert the PS back > to PDF if you need to. But if you already tried that, then, I don't > know... >From what I've been reading, it's always better to use pdftops (poppler) because pdf2ps generates lower-level stuff and also converts fonts to bitmap. But both ways, I'd end up doing the conversion in ghostscript, and that's where the problem is. -- Nuno J. Silva gopher://sdf-eu.org/1/users/njsg