We have scans (PDF) of a number of reports documenting early geometric models in the COMGEOM format (a now obsolete format, but the models are interesting nonetheless). These reports contain the actual geometry defining the model as pages and pages of numbers and letters. Unfortunately, the quality is sufficiently poor that optical character recognition (OCR) has a very high rate of error.
This task is to attempt the manual transcription of the MEP-021A Generator Set model described in the report ''A Combinatorial Geometry Computer Description of the MEP-021A Generator Set'' (see the References list below for the link that will let you download the PDF). One possible approach is to use Acrobat Reader or some other PDF reader select and copy the OCR text, paste that to a text file as a starting point, and then manually correct it. There may also be some patterns that will allow for semi-automated processing (for example, if 5 zeros in a row are commonly replaced with the character ''O'' instead of 0, a search and replace is in order.) However you wish to approach it is fine, but remember that the goal is not just the extraction of the OCR text but the production of an accurate transcription of the file. The OCR text can be used as a starting point but it will NOT be accurate.
The goal is to have a file that can be fed to BRL-CAD's comgeom-g importer to generate an accurate .g file. If the generator conversion goes well, there are a significant number of other models (some of them considerably more complex) that we are interested in that can be used to create more tasks of this nature.
References:
- http://www.dtic.mil/docs/citations/ADA073408
Code:
- src/conv/comgeom
Please discuss your progress with the developers. This task has the potential for being broken up into multiple tasks depending on the time and accuracy of your conversion.
| File name/URL | File size | Date submitted | |
|---|---|---|---|
| TABLE A.asc | 32.1 KB | December 03 2014 17:37 UTC | |
| TABLE A Final3.asc | 32.9 KB | December 05 2014 17:07 UTC | |
| TABLE A Final4 Dec 8 2014.asc | 55.5 KB | December 08 2014 22:01 UTC |
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by inserting spaces. Otherwise the comgeom-g importer has no chance to generate a .g file.
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Rexey, this is looking a lot better but there is still some column misalignment. Notice 3rd and 4th line of the file that looks like this:
1 RCC -303.0232 0.0000 0.0000 697.4867 0.0000 0.0000 CRANKSHAFT12.7001 0.0000 0.0000 0.0000 0.0000 0.0000 CRANKSHAFTWith columns aligned, it should look like:
1 RCC -303.0232 0.0000 0.0000 697.4867 0.0000 0.0000 CRANKSHAFT12.7001 0.0000 0.0000 0.0000 0.0000 0.0000 CRANKSHAFTEach item should be aligned with the column above it. Notice how the REMARK item (CRANKSHAFT) ends up aligned and all of the decimal points align.
Make sense? Once more pass and this will be complete. Note that there are a lot more tasks like this one too. :)
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Rexey, that looks MUCH much better, thank you! How long did this take you in terms of hours?
There are other tasks we have just like this one, but we want to make sure they're appropriately scoped. We can create many more too, if you're interested in getting the t-shirt or going for the top-10! Thank you for your efforts, well done.
It took a few days, some which was spent on trying to get formatting. I would be interested in some more of these types. Thanks.