Technologically the most demanding part of the scanning process is creating digital images of the See the instructions with the source code.Ĥ. So the protocol is to always power up the There is no reliable way to make a distinction between the leftĪnd right camera, only between which camera was recognized by USB first. Script sends CHDK command line instructions to the camerasĢ. The scanning sequence is the following:ġ.
#BREW DJVUREADER PC#
Both cameras are connected to the PC with USB. The scanner uses two Canon point and shoot cameras. If you want to know more on the design of the scanner, contact Michael Korntheuer scanning and post-processing is automated by a single Python script that does all the work The Bruxelles scanning process is different in so far as the cameras are operated by a computer and the images areĪutomatically transferred, ordered and made ready for further post-processing.
#BREW DJVUREADER PDF#
Ing of pages, whereas Public Library scanner has manual turning of pages), theįundamental difference between the two is in the post-processing - the level of automation in the transfer of imagesįrom the cameras and their transformation into PDF or DjVu e-book format. automated renaming of files, ordering of even and odd pages, rotation of im manual transfer of image files to the computer for post-processing,ģ. creating digital images of pages of a book,Ģ. The Public Library scanning process proceeds thus in following discrete steps:ġ. Aīrief overview of one such scanner, developed at the Hacker Space Bruxelles, is also included in Process than highly automated and sophisticated scanner hacks developed at various hacklabs. Public Library scanner is characterized by a somewhat less automated yet distributed scanning It was initially developed for the HAIP festival in Ljubljana inĢ011 and perfected later at MaMa in Zagreb and Leuphana University in Lüneburg.
#BREW DJVUREADER SOFTWARE#
Personal computer and on the use of free software for image editing, optical character recognitionĪnd finalization of an e-book file. The post-processing in this setup is based on a semi-automated transfer of files to a GNU/Linux Two-camera overhead scanner, currently equipped with two Canon 1100 D cameras with EF-S 1855mm 1:3.5-5.6 IS kit lens. This manual is primarily meant to provide a detailed description and step-by-step instructions for anĪctual book scanning setup - based on the Voja Antonić's scanner design described above. tiffsĪ step by step manual for Public Library scanner Getting the image files ready for post-processing The book scanning process in general can be broken down in six steps, each of which will be dealt More on this manual: steps in the book scanning process The upper, smaller buttonīreaks the capture process in two steps: the first click lowers the platen, increases the light level andĪllows you to adjust the book or the cradle, the second click triggers the cameras and lifts the platen. The scanner is operated by a two-button controller (see Illustration 2). The turning of pages and the adjustments of the V-shaped cradle holding The scanner operates by automatically lowering the Plexiglas platen, illuminating the page and then The current iterations are using two Canon 1100 D cameras with the kit lensĬanon EF-S 18-55mm 1:3.5-5.6 IS. Scanner was less sophistication and more robustness, facility of use and distributed process of Hence, the principle consideration in designing the Public Library The Public Library scanner was built with the immediate use by a wideĬommunity of users in mind. In the focus of this manual is the scanner built for the Public Library project, designed by VojaĪntonić (see Illustration 1). With a bit of adaptation these instructions can be used to work with any other setup. Hence, in this introductory chapter we'llįocus on two camera designs where the camera lens stands relatively parallel to the page. Sometimes be difficult to correct in the post-processing. Of de-warping the distorted page images due to the angle that pages are photographed at, which can