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Blurred thumbnails - where is sharpening?

Posted: Sat Jun 04, 2016 4:46 am
by mrwul
Noticed that large thumbnails are blurred, vainly tried to find settings that will sharpen the thumbnails.
Q: where can I find it?


Meanwhile, I went into Settings->Browser->Catalog->db settings
Noticed a LOT, I mean a LOT of folders in the 'cached directory'.
[Delete All] button (at the bottom) didn't work. I could delete some cached folders of non-existing paths (paths to disconnected external USB drives)
There are sooo many folders still left under 'Cached Directory' - I would not know whether or not they all exist.
Anyway I clicked on 'Rebuild thumbnails' and it will take (quite) a while to do so.
Not sure whether that is the solution though.

attachment shows a preview by Directory Opus (left) and XnViewMP latest version, right.

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http://www.xnview.com/mantisbt/view.php?id=56
http://newsgroup.xnview.com/viewtopic.php?f=60&t=28595
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Re: Blurred thumbnails - where is sharpening?

Posted: Mon Jun 06, 2016 7:45 am
by xnview
please check Settings>Catalog>WidthxHeight

Re: Blurred thumbnails - where is sharpening?

Posted: Mon Jun 06, 2016 9:47 am
by mrwul
xnview wrote:please check Settings>Catalog>WidthxHeight
? Okay, but then what?

Re: Blurred thumbnails - where is sharpening?

Posted: Mon Jun 06, 2016 9:55 am
by cday
mrwul wrote:
xnview wrote:please check Settings>Catalog>WidthxHeight
? Okay, but then what?
A Compression setting that results in sharper thumbnails: Lossless (ZIP) or a higher quality Lossy option ??

Re: Blurred thumbnails - where is sharpening?

Posted: Mon Jun 06, 2016 11:10 am
by mrwul
It is set to 'None

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set to lossless zip and also tried high quality jpeg
does not make any difference
(closed and relaunched XnViewMP in between)

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Re: Blurred thumbnails - where is sharpening?

Posted: Mon Jun 06, 2016 12:12 pm
by cday
mrwul wrote:It is set to 'None
...
set to lossless zip and also tried high quality jpeg
does not make any difference
(closed and relaunched XnViewMP in between)
And you clicked on Rebuild thumbnails ?

Ah, you asked originally about sharpening, and I see that in XnView MP that option can be found in Tools > Options > Browser > Thumbnails -- Misc tab :idea:

Re: Blurred thumbnails - where is sharpening?

Posted: Tue Jun 07, 2016 9:42 am
by mrwul
cday wrote:
mrwul wrote:It is set to 'None
...
set to lossless zip and also tried high quality jpeg
does not make any difference
(closed and relaunched XnViewMP in between)
And you clicked on Rebuild thumbnails ?

Ah, you asked originally about sharpening, and I see that in XnView MP that option can be found in Tools > Options > Browser > Thumbnails -- Misc tab :idea:
Yes, I clicked rebuild.
As for sharpen, that has been 'set'

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Re: Blurred thumbnails - where is sharpening?

Posted: Tue Jun 07, 2016 10:08 am
by cday
And you still have blurred thumbnails?

Re: Blurred thumbnails - where is sharpening?

Posted: Tue Jun 07, 2016 10:22 am
by mrwul
Yes, regretfully so. I can submit another examples, but they are 'big' and I am not sure Pierre agrees to that.

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Re: Blurred thumbnails - where is sharpening?

Posted: Tue Jun 07, 2016 10:25 am
by cday
Does selecting Sharpening have a visible effect, could it be that it isn't operaring correctly?
mrwul wrote:I can submit another examples, but they are 'big' and I am not sure Pierre agrees to that.
Is the problem possibly confined to large images, which might require a different sharpening setting??

The current forum upload limit is 2MiB, but you could upload larger files to a file hosting service and provide a link, or if necessary send an example to Pierre as an email attachment at the xnview contact address on the home page...

Re: Blurred thumbnails - where is sharpening?

Posted: Tue Jun 07, 2016 11:26 am
by mrwul
I had this example on imgur
it would be nice to have this displayed as thumbnail and ONLY once a user clicks on it, it will be displayed full screen.

Left Directory Opus, right XnViewMP

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Image
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(sorry pierre)

Re: Blurred thumbnails - where is sharpening?

Posted: Tue Jun 07, 2016 12:00 pm
by mrwul
That aside, I again started 'rebuild thumbnails' and I noticed that some thumbnails are sharp now.
Rebuilding takes quite some time and it is rebuilding thumbnails (at least it looks that way) of a lot of folders, outside the 'Base path of your pictures'
(settings-browser-catalog)
I mean: I have X:\JPG there (example)
in cached directory it showes e.g. X:\Photos D:\Downloads C:\Users etc.

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