No image displayed for a few images in Thumbnail view

Geshy · Post by **Geshy** » 2007 Dec 17, 17:55

I have several thousand images in a folder that I view in Thumbnail view. Most display perfectly but several display as a white area with a dimension of 0 x 0. I can correct this by resaving the image from another program but locating the 0 pixel images and resaving each is a PITA. A far as I can determine this is limited to xplorer's Thumbnalil view display since the images display fine in all other programs. The images are all JPG's.

I tried refreshing the folder but that does not update the pixel size.

Is there any way to force a more complete rereading of the Thumbnails so that the pixel size gets updated.

WinXP Pro with all updates & xplorer2 (ver 1.7.0.5 LITE)

fgagnon · Post by **fgagnon** » 2007 Dec 17, 18:05

Hi Geshy,

Welcome to the board!

I'm not sure if this will help beacuse I don't know what you mean by
"... a white area with a dimension of 0 x 0."
But you might want to check the setting for size limit for Thumbnails on the
General tab in Tools | Options...
Set to 0 for unlimited.

HTH

Geshy · Post by **Geshy** » 2007 Dec 17, 19:12

If you hover over and image, a tool tip appears which contain the pixel information. For example, "Dimension 752 x 851". In the case of my blank Thumbnails, that information is "Dimension 0 x 0". If I resave the image from another program, the image now displays and the tool tip gives me accurate dimension information. BTW I can do this without closing xplorer.

The setting under options that you suggest appears to prevent the program from trying to create a Thumbnail of a very large image which is not my situation. If this is incorrect, let me know.

fgagnon · Post by **fgagnon** » 2007 Dec 17, 21:41

Thanks for clarifying what you meant.
The only times I have seen similar to what you describe has been when the 3rd party app merely opened the file in the folder 'for writing' and before the file was written and 'closed'.
What does the Details view say about the files in question when the infotip indicates 0x0 size? For that matter, what does the infotip say about file size? :?
(I assume that you tried a manual refresh [Ctrl+R] to no avail.)

PS - yes, that is what the setting is for that I suggested in my initial response. ;)

Geshy · Post by **Geshy** » 2007 Dec 18, 06:33

The tool tip displays the program that opens the file and the file size in addition to the dimensions. Both the program name and the file size are correct.

Picassa is running in the background looking to new image files so maybe if Picassa is trying to read the file at the same time as xplorer is creating the thumbnails. However these are older files (one was saved about a year ago) so this seems unlikely. Other than that, these file have not been edited or resaved since they were created.

In addition, the larger preview panel (under the directory list on the left) is also blank for the 0 x 0 files. Refreshing with the file highlighted (so it would appear in the preview panel) also has no effect.

I have good spyware and antivirus protection so I don't think that's the problem either.

Post by **nikos** » 2007 Dec 18, 08:21

there are byte size limits for both thumbnail and infotip extraction, so it looks like you need to increase both like fred said

Geshy · Post by **Geshy** » 2007 Dec 18, 17:05

I set both to unlimited and refreshed. No difference.

Is there any downside to leaving them both at unlimited?

Post by **nikos** » 2007 Dec 18, 17:33

it just makes the program a bit slower for huge images.

mrredsun · Post by **mrredsun** » 2007 Dec 20, 22:27

I've got a similar issue with some TGA thumbnails not showing up. I have found that in my case, images that are taller than they are wide will result in a missing thumbnail icon. The Quick Viewer will show correct previews of images with and without a visible thumbnail.

Perhaps in Geshy's case these images with missing thumbnails are vertical? Or perhaps their size data was encoded incorrectly by a program or device.

In either case, is there a way to enable thumbnails of portrait-oriented images?

fgagnon · Post by **fgagnon** » 2007 Dec 21, 01:49

The thumbnail display fields are square by definition. The size of the square is defined by the registry key nThumbSize. Image thumbnails are sized to fit the largest dimension within each field, maintaining correct aspect ratio. This accommodates both portrait and landscape orientations (and even skinny panoramas, both H & V).
At least that's how they work for me.

[x2 v1705 on XP+sp2] (works the same for both x2 Lite & Pro)

Geshy · Post by **Geshy** » 2007 Dec 21, 16:23

Almost all of my images are portrait orientation and only a few don't display. They don't display in the quick view panel either.

I just installed an additional hard drive and moved my images there. I still have the problem with a few images not displaying only they are different images. This convinces me that the problem is not with the images but with the program.

I guess I'll just have to live with this behavior.

fgagnon · Post by **fgagnon** » 2007 Dec 21, 21:01

Is there anything unique about the images that do not display?
date, size, file type, etc?

I ask because earlier you indicated that after resaving them thumbs appeared ok. I wonder if the problem ones were created in an old less-than-100% standard format, and opening & resaving filled in some metadata which may have been missing from the originals. :?

Geshy · Post by **Geshy** » 2007 Dec 22, 14:40

There doesn't seem to be anything unique about the files in question. I looked at three of them and their creation dates were in 2005, 2006 and 2007.

I use a program called JPGClean which is supposed to remove extraneous data from the jpg files. I assume that would included meta data and thus my files wouldn't have any.

Also if there was a problem with the file structure, why would moving the files to another drive cause the same problem but with different files.

fgagnon · Post by **fgagnon** » 2007 Dec 22, 15:42

metadata is generally descriptive info about the file contents and not usually considered extraneous. It is generally placed at the beginning of the file or in an associated alternate data stream (ADS) for files on a NTFS partition. I know nothing about JPGClean to say whether it has anything to do with your issue, but it sounds suspicious. Which so-called extraneous data did JPGClean remove?

As to why simply moving the files to another drive would change which ones show preview or thumbnails -- that's really spooky.
Have you verified that the files are exactly the same?
Is either drive a non-NT File System partition?

Geshy · Post by **Geshy** » 2007 Dec 22, 16:22

I consider any information not required to display the image extraneous such as the program that created the file, keywords, titles, etc.

All files have been processed thru JPGCleaner and all but a very few display just fine. About half the files have had some non-image information removed.
I started using JPGCleaner several years ago when MS had a flaw in the way images were processed that could allow a virus to be embedded in an image.
At least that's how I remember it and you just can't be to careful when it comes to viruses.

Xplorer2 is the only program I have noticed that exhibits this behavior.

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No image displayed for a few images in Thumbnail view

No image displayed for a few images in Thumbnail view

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