From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by befuddled.reisers.ca (Postfix, from userid 65534) id 8FAAD1EFB22; Fri, 6 Nov 2015 05:30:13 -0500 (EST) Received: from dragnet.batsupport.com (dragnet.batsupport.com [176.9.155.71]) by befuddled.reisers.ca (Postfix) with ESMTPS id B29961EFB11 for ; Fri, 6 Nov 2015 05:30:11 -0500 (EST) Received: from [192.168.0.133] (ip98-176-22-138.sd.sd.cox.net [98.176.22.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bats@batsupport.com) by dragnet.batsupport.com (Postfix) with ESMTPSA id 315A81F005C4 for ; Fri, 6 Nov 2015 02:30:09 -0800 (PST) Subject: Re: Scanning To: speakup@linux-speakup.org References: <0E3E79A1-F2B3-40EF-A679-E6B165047A2D@icloud.com> <87mvut5fvx.fsf@mushroom.localdomain> <563B7621.1010603@math.wisc.edu> From: Tony Baechler Organization: Baechler Access Technology Services Message-ID: <563C812C.5000807@baechler.net> Date: Fri, 6 Nov 2015 02:30:04 -0800 User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <563B7621.1010603@math.wisc.edu> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 X-BeenThere: speakup@linux-speakup.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Speakup is a screen review system for Linux." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Nov 2015 10:30:13 -0000 According to Project Gutenberg Distributed Proofreaders (pgdp.net if you're interested), they actually recommend not scanning at 600 DPI. They recommend 300 DPI for most books and 400 DPI in rare cases. I can confirm this to be the case in my experience. When I scan at the highest resolution, I actually get worse text results. Not only does 300 DPI scan faster, but seems to do a better job. Of course I don't know about non-English text. Maybe 400 DPI works better for other languages. On 11/5/2015 7:30 AM, John G Heim wrote: > I did a lot of experimentation while scanning in the D&D manual. I found > that I got best text recognition when I scanned in the page as line art. My > scanner has a top resolution of 600 dots per inch. I don't know if that's > good or bad. It's is a really ancient scanner. Someone just gave it to me > because they were upgrading to Windows XP and it didn't have drivers. When > would that have been, 2001? But it still works great in linux.