Daniel Reetz, the founder of the DIY Book Scanner community, has recently started making videos of prototyping and shop tips. If you are tinkering with a book scanner (or any other project) in your home shop, these tips will come in handy. https://www.youtube.com/channel/UCn0gq8 ... g_8K1nfInQ

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by adamzero
11 Jul 2013, 14:26
Forum: Programs, Software releases, and more.
Topic: Scantailor preprocess script
Replies: 30
Views: 19084

Re: Scantailor preprocess script

Thanks for your detailed reply! I did kludge it to the point of working this morning. First I imagemagicked the colors to get the background near-white, then I manually recolored a couple dozen dots in that bottom right corner, passed ppmunwarp the pc flag with that color, and after that everything ...
by adamzero
11 Jul 2013, 01:13
Forum: Programs, Software releases, and more.
Topic: Scantailor preprocess script
Replies: 30
Views: 19084

Re: Scantailor preprocess script

More data for you: I thought maybe I should do geometry correction first, since the keystoning might be making it hard for ppmunwarp to find the dots. When I try to do geometry correction, note the following: When I do ./ppmunwarp -mul 5.08 -m check.ppm calibration.ppm > calibration.bin Number of de...
by adamzero
09 Jul 2013, 16:50
Forum: Programs, Software releases, and more.
Topic: Scantailor preprocess script
Replies: 30
Views: 19084

Re: Scantailor preprocess script

Thanks for the response! FYI, for any mac users who want to use the preprocess script, every instance of sed -r has to be replaced by sed -E. Here is a link to my calibration image: http://s21.postimg.org/qlus584mv/calibration.jpg / it is also uploaded attached to this post. The problem is not an im...
by adamzero
08 Jul 2013, 12:03
Forum: Programs, Software releases, and more.
Topic: Scantailor preprocess script
Replies: 30
Views: 19084

Re: Scantailor preprocess script

Hi everyone, I'm having trouble. I'm running this on OS X, on jpgs, in automatic dpi mode, without color calibration. "calibration.bin" is zero bytes, and (thus?) so is every other "*_corrected.ppm" file. What's going wrong and how do I fix it? Here's the log: Your camera images are now being prepar...
by adamzero
08 Jul 2013, 10:30
Forum: Tutorials/How-To's
Topic: Preprocessing RAW images for Scantailor
Replies: 37
Views: 26405

Re: Preprocessing RAW images for Scantailor

Hi everyone, I'm having trouble. I'm running this on OS X, on jpgs, in automatic dpi mode, without color calibration. "calibration.bin" is zero bytes, and (thus?) so is every other "*_corrected.ppm" file. What's going wrong and how do I fix it? EDIT: Apologies for posting this in the RAW-oriented th...
by adamzero
05 Jul 2013, 12:31
Forum: Book Scan Wizard
Topic: setting DPIs / losing DPIs
Replies: 2
Views: 6424

setting DPIs / losing DPIs

I'm using BSW and it seems to be losing the DPIs on the files (which are also coming out 5 times bigger than before and different pixel dimensions). The input files are lzw compressed tifs, they all have DPI set, I've checked with imagemagick, and the output files have no DPI. My script is pasted be...