[okular] [Bug 408222] Okular is bad in displaying of scanned PDF ! Please fix this !

[David Hurka]

https://bugs.kde.org/show_bug.cgi?id=408222

--- Comment #21 from David Hurka <david.hurka at mailbox.org> ---
(In reply to Tobias Deiminger from comment #20)
> But that impression is subjective, can we try to
> quantize a bit what "better" means? E.g., we could measure "densitiy of
> black" in a histogram, right? Any other hints what "better" could mean here?

My first idea is to agree to using a histogram, and make an artifical reference
“scan”, containing various edges at various sizes, angles, sharpnesses,
resolutions,... and make a histogram to count how many pixels in the rendering
output are used for edges.

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