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colindean / optar

OPTical ARchiver - highly compressed 2D barcode for paper or film archiving of digital data
http://ronja.twibright.com/optar/
GNU General Public License v2.0
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Failed to decode and unexpected behavior with custom configuration #18

Open Faultiness opened 5 months ago

Faultiness commented 5 months ago

Hi. I tried to conduct some tests to determine the most suitable parameters for my printer and scanner. I succeeded in compiling the project on my M2 chip Mac, and the printer/scanner I use is an Apeos C6570, which is supposed to print/scan with 600+ dpi. I choose a file and then use five different settings of XCROSSES and YCROSSES to compile, and then print/scan on A4 paper using the same parameters. Here is the decode result:

Group XCROSSES YCROSSES rate% of irreparable
1 65(default) 93(default) 9.8574
2 59 84 51.5284
3 52 74 51.6052
4 46 65 51.5284
5 39 56 51.8302

It can be noticed that the proportion of irreparable behaves very strangely (rising and extremely close). Here I attach the 100% zoom of scans from group 1 and group 5:

图片

Any idea for the reason? Thanks for any suggestions.

colindean commented 4 months ago

Thanks for filing an issue. To set expectations, I'm mostly a user of this software and haven't dug into its inner workings in a very long time. This repo is more of an archive so the source is easily available, but I'm happy to accept patches as PRs if you fix a repeatable problem.