Automatically recreate the thumbnail after lossless crop

Bugs and Suggestions in XnView Classic which have been resolved

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Dreamer
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Automatically recreate the thumbnail after lossless crop

Post by Dreamer » Tue Mar 24, 2009 11:22 pm

Automatically recreate the thumbnail after lossless crop, not only after lossless rotate.

Thanks.
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helmut
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Re: Automatically recreate the thumbnail after lossless crop

Post by helmut » Thu Apr 09, 2009 4:07 pm

+1

Not updating the thumbnail might be even embarrassing depending on the stuff that was cut off. An example: http://graphicssoft.about.com/b/2003/07 ... -blame.htm

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Re: Automatically recreate the thumbnail after lossless crop

Post by jaqian » Thu Jun 11, 2009 9:56 am

+2
Also an option to rotate thumnail so that it matches the full image, currently I have to edit in GIMP and save thumbnail.
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GeorgD
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Re: Automatically recreate the thumbnail after lossless crop

Post by GeorgD » Fri Oct 23, 2009 12:42 pm

+3. I often forget it and later wonder that I did not yet process the pics of the folder but it's only the preview that's old...
jaqian wrote:Also an option to rotate thumnail so that it matches the full image, currently I have to edit in GIMP and save thumbnail.
Sorry, I don't get this - what do you mean? What's different to XnView's build-in function (go to browser, select all JPG and Edit - Metadata - Recreate Thumbnail)?
In the XnView Wiki, you can improve the user guide / documentation / F1-help for XnView (classic/Windows) and for XnViewMP

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Re: Automatically recreate the thumbnail after lossless crop

Post by Dreamer » Sat Oct 24, 2009 12:50 am

You are right, actually embedded thumbnails are rotated automatically when using lossless rotate in browser here - not like lossless crop! So even recreating the thumbnail is not needed in that case.
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Re: Automatically recreate the thumbnail after lossless crop

Post by Dreamer » Wed Nov 04, 2009 12:00 am

Should be added/changed in 1.97 beta 1, but...

...Embedded thumbnail is not recreated? :?

Moved to "1.97 Testing - Feedback".
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Re: Automatically recreate the thumbnail after lossless crop

Post by xnview » Wed Nov 04, 2009 8:03 am

Dreamer wrote:Should be added/changed in 1.97 beta 1, but...

...Embedded thumbnail is not recreated? :?
For me, the embedded thumbnail is re-created...
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Re: Automatically recreate the thumbnail after lossless crop

Post by Dreamer » Thu Nov 05, 2009 12:16 am

xnview wrote:For me, the embedded thumbnail is re-created...
Automatically, after lossless crop??
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Re: Automatically recreate the thumbnail after lossless crop

Post by xnview » Thu Nov 05, 2009 11:41 am

Dreamer wrote:
xnview wrote:For me, the embedded thumbnail is re-created...
Automatically, after lossless crop??
Yes, i've checked again
Pierre.

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Re: Automatically recreate the thumbnail after lossless crop

Post by Dreamer » Thu Nov 05, 2009 6:24 pm

Strange, I tried with cache enabled and disabled, manually rebuild thumbnails... Still the same. When using non-lossless crop, it's OK.

Anyone else? :?
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Re: Automatically recreate the thumbnail after lossless crop

Post by xnview » Thu Nov 05, 2009 6:59 pm

Dreamer wrote:Strange, I tried with cache enabled and disabled, manually rebuild thumbnails... Still the same. When using non-lossless crop, it's OK.
Anyone else? :?
Could you send me a jpeg sample?
Pierre.

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GeorgD
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Re: Automatically recreate the thumbnail after lossless crop

Post by GeorgD » Fri Nov 06, 2009 4:48 pm

xnview wrote:For me, the embedded thumbnail is re-created...
Update: Yes, I do have similar issues as Dreamer :-( Cropping once does all the job, then again updates only EXIF thumbails but keeps old XnView-Cache-Thumbnail, then again updates XnView-Cache-Thumbnail but not the EXIF-thumbnail. It's the same image (I made some clones) so the image content can't be the reason. I can't find a rule for the behaviour. It happens with shortcut nd Menu entry, "Backup option for lossless operation" enabled or disabled.
In the XnView Wiki, you can improve the user guide / documentation / F1-help for XnView (classic/Windows) and for XnViewMP

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Re: Automatically recreate the thumbnail after lossless crop

Post by Dreamer » Sat Nov 07, 2009 12:57 am

OK, so it looks, it works always one step behind.

- original image is 1600x1600 (just for example)
- lossless crop to 800x800
= embedded thumbnail is the same as 1600x1600
- now crop it again to 400x400
= embedded thumbnail is now the same as 800x800 image
- crop it again to 200x200
= embedded thumbnail is the same as 400x400 image

Tested with cache disabled in beta 2, on Win Vista.
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Re: Automatically recreate the thumbnail after lossless crop

Post by marsh » Sat Nov 07, 2009 3:03 am

Dreamer wrote:OK, so it looks, it works always one step behind.

- original image is 1600x1600 (just for example)
- lossless crop to 800x800
= embedded thumbnail is the same as 1600x1600
- now crop it again to 400x400
= embedded thumbnail is now the same as 800x800 image
- crop it again to 200x200
= embedded thumbnail is the same as 400x400 image

Tested with cache disabled in beta 2, on Win Vista.
It works fine here. Some kind of read ahead/cache behind issue?
---edit--
Doh! Dreamer's example confirmed with write>jpg 'rebuild thumb' setting on or off.
Last edited by marsh on Sat Nov 07, 2009 1:05 pm, edited 3 times in total.

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Re: Automatically recreate the thumbnail after lossless crop

Post by xnview » Sat Nov 07, 2009 12:38 pm

Could you send me jpeg sample?
And 'rebuild EXIF thumbnail' works?
Pierre.

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