[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 #10 from David Hurka <david.hurka at mailbox.org> ---
Created attachment 120580
  --> https://bugs.kde.org/attachment.cgi?id=120580&action=edit
Pixels

Using Albert’s screenshot, one could say that Evince and Okular draw slightly
different. Indeed, where the arrow points, Evince is sharper than Okular,
resulting in a higher contrast and a differently perceived black tone.

Could have these reasons:
a) Both have a slightly different alignment of the scanned image, resulting in
different sampling of rendered pixels which are not exactly on image pixels.
b) Both have same alignment, but use different filtering. (Bilinear, Bicubic,
Nearest Neighbour,... In fact, Okular does not use nearest neighbour, causing
smeared edges on scans. Maybe Evince does?)
c) this happened just at random for exactly these zoom factors.

-- 
You are receiving this mail because:
You are the assignee for the bug.