IWA's Expedient Quality Rating System v1.1
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In my filenaming scheme, my filenames always end with a scan Quality 
code that looks something like this:

[Q4-OCR]

It may also end with the nick of the scanner, if it is somehow evident 
or known.  I do my best to attribute those who bring us these wonderful 
scans, but I am not part of the scene and I can make errors or just 
plain not recognize one or more scanners' symbols.

I hope you enjoy my carefully-graded and organized collections!  This 
stuff takes a bit of time and effort, so I'm ingratiated if people find 
it a useful alternative to the usual partial collections of 
inconsistently-named files.

If you have anything to add, anything to correct, or just would like to 
comment (especially if you want to say something nice!), please send me 
a PM through Demonoid.

Cheers!
IWA (linglingtopher)


How to Read the Scan Quality Code
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The Q rating is (generally) determined by the overall scanning/copying 
quality, and is partially subjective.

Q5: Digital originals.  Applies only to original digital PDFs; the best 
    a print-scan can do is Q4+.

Q4: An excellent-quality scan, readable without major defects.  OCR 
    scannable with a reasonable degree of accuracy.

Q3: Decent- to good-quality scan, with one or more serious defects 
    (skewed pages, sub-OCR image quality, portions of pages lopped off, 
    etc.).  If it has no major defects but looks fax-quality and is 
    usable though not exactly pretty, it gets Q3.
    
Q2: A bad scan.  Major defects render this PDF hard to read or seriously 
    ugly, with some information loss.  Scans of crappy photocopies might 
    go here as well.

Q1: An atrocious scan; hardly useable.  Not generally even worth 
    keeping.


An additional plus (+) or minus (-) after the Q rating modifies it to 
allow for more sensitive gradation.  Original digital PDFs (i.e. [Q5]) 
will never have a + or - added.


In additional, there are other codes that may be added:

OCR: The PDF contains OCR text (whether it replaces the image text or is 
     stored "behind" it).  If I happened to check the quality of the OCR 
     and found it to be full of errors or otherwise problematic, I might 
     add a minus (-) after OCR, as in [Q4OCR-].

HTM: The PDF is a rendering of a web page into PDF form, with the usual 
     ugliness.

MC:  The PDF is missing one or more covers.

MP:  The PDF is missing one or more internal pages.

DMG: The PDF is digitally damaged (e.g., an image cannot be rendered). 
     This does *not* include scans where the original physical page was 
     damaged; this is about data corruption or a bad PDF file.


MP: A designation that the book for some reason is incomplete.  Stands 
    for "missing pages."