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Xnview showing "grey pixel grid" instead of pure white
Posted: Sun Mar 20, 2011 12:13 pm
by andrea.ippo
I'm using 1.97.8, although I tried also with 1.98 beta a few days ago, and it's also affected.
The problem is this: if the high quality zoom option is enabled, white backgrounds in photos appear with a grid texture, made of grey pixels.
Here is a portion of a photo that perhaps explains it better (left - grid vs right - white):
Disabling that option solves the problem, but also gives more rough images of course.
I've checked other programs and they don't seem affected by this issue (Faststone image viewer for example, which also has a similar option, isn't affected by the issue either turning this option on or off, the windows viewer isn't affected, nor irfanview, etc).
Could you please take a look at it?
Thanks.
PS: this is the option I mean:
Re: Xnview showing "grey pixel grid" instead of pure white
Posted: Fri Mar 25, 2011 8:11 pm
by andrea.ippo
No one else noticing this?
Re: Xnview showing "grey pixel grid" instead of pure white
Posted: Sun Mar 27, 2011 1:22 pm
by andrea.ippo
UP
Re: Xnview showing "grey pixel grid" instead of pure white
Posted: Mon Mar 28, 2011 1:13 pm
by JohnFredC
Sorry, but the image link you posted shows a "white on white" (ie: blank) bitmap, so it's not clear about the bug you are reporting. Could you try another link?
Re: Xnview showing "grey pixel grid" instead of pure white
Posted: Mon Mar 28, 2011 3:17 pm
by andrea.ippo
JohnFredC wrote:Sorry, but the image link you posted shows a "white on white" (ie: blank) bitmap, so it's not clear about the bug you are reporting. Could you try another link?
That's strange, because I see the left side with this "grid" and the right side of pure white
Re: Xnview showing "grey pixel grid" instead of pure white
Posted: Tue Mar 29, 2011 2:30 am
by XnTriq
andrea.ippo wrote:JohnFredC wrote:Sorry, but the image link you posted shows a "white on white" (ie: blank) bitmap, so it's not clear about the bug you are reporting. Could you try another link?
That's strange, because I see the left side with this "grid" and the right side of pure white
Appying the
Normalize or
Equalize filter (
Image »
Map) reveals a barcode-like pattern (R254/G254/B254 on pure white background) in this image.
The PNG has a private
vpAg ("virtual page") chunk which is used in ImageMagick to store “virtual page” size.
See also:
Some gifs changes their background when zoomed in/out
Re: Xnview showing "grey pixel grid" instead of pure white
Posted: Mon Apr 11, 2011 7:36 pm
by xnview
With your sample, i have a border on the left & right side...
Re: Xnview showing "grey pixel grid" instead of pure white
Posted: Thu Oct 27, 2011 8:15 pm
by zzeedd
Hey,
I would like to confirm that I see the same grey grid when looking at white images, at certain zoom levels. Disabling the "reduce option" as suggested by andrea.ippo works for me as well.
Zoltan.
PS: For those, who cannot see the grid on the image posted by andrea.ippo, if you have an LCD screen, try to look at it from the top from a really low angle.
