On Microsoft Windows operating systems, starting with the Internet Explorer 4 Active Desktop Update for Windows 95 to 98,[1][2] a thumbnail cache is used to store thumbnail images for Windows Explorer's thumbnail view. This speeds up the display of images as these smaller images do not need to be recalculated every time the user views the folder.
Windows stores thumbnails of graphics files, and certain document and movie files, in the Thumbnail Cache file, including the following formats: JPEG, BMP, GIF, PNG, TIFF, AVI, PDF, PPTX, DOCX, HTML, and many others. Its purpose is to prevent intensive disk I/O, CPU processing, and load times when a folder that contains a large number of files is set to display each file as a thumbnail. This effect is more clearly seen when accessing a DVD containing thousands of photos without the thumbs.db file and setting the view to show thumbnails next to the filenames. Thumbnail caching was introduced in Windows 2000;[2] wherein the thumbnails were stored in the image file's alternate data stream if the operating system was installed on a drive with the NTFS file system. A separate Thumbs.db file was created if Windows 2000 was installed on a FAT32 volume. Windows Me also created Thumbs.db files.[2] From Windows XP, thumbnail caching, and thus creation of Thumbs.db, can optionally be turned off. In Windows XP only, from Windows Explorer Tools Menu, Folder Options, by checking "Do not cache thumbnails" on the View tab. In other versions of Windows, thumbnail caching can be turned off via Group Policy. Under Windows 2000, Windows Me, and Windows XP, a context menu command to force refreshing the thumbnail is available by right clicking the image in Thumbnail view of Windows Explorer.
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Beginning with Windows Vista, thumbnail previews are stored in a centralized location on the system. This provides the system with access to images independent of their location, and addresses issues with the locality of Thumbs.db files. The cache is stored at %userprofile%\AppData\Local\Microsoft\Windows\Explorer as a number of files with the label thumbcache_xxx.db (numbered by size); as well as an index used to find thumbnails in each sized database.
However, when browsing network shares with write permission, Windows Vista and Windows 7 store a Thumbs.db file in the remote directory instead of using the (local) central thumbnail cache. This can cause issues when deleting remote shares, as the directory will become locked for a period of time when selected as Windows Explorer automatically creates a remote Thumbs.db file.
In 2013, research was conducted that focused on the Digital Forensic implications of thumbnail caches and recovering partial thumbnail cache files. It identified that whilst there is a standard definition of a thumbnail cache the structure and forensic artifacts recoverable from them varies significantly between operating systems. The work also showed that the thumbcache_256.db contains non-standard thumbnail cache records which can store interesting data such as network place names and allocated drive letters.[8][9]
On a Windows 10 device, i need to disable this as it is often used in Extended Desktop mode for projecting/displaying content to the public on a second display. While in control using the primary monitor, when trying to switch windows it will often also peek the desktop on the secondary displays, which is not ideal.
Just to be clear, this is the only function of Aero Peek that i want to disable. I want to keep the taskbar thumbnails, and the option to desktop peek when hovering over the little button on the bottom right (far right of the taskbar).
So... Who else whould love PSB thumbnails in Windows Explorer??
I installed Adobe Bridge only to see my PSBs. A single digital painting for me can run up to 15GB and take 2 weeks to paint so I need PSBs. A PSD file just doesn't cut the mustard any more. I use plugins like 'QuickLook' in Windows to preview files which is great but it doesn't work with .PSBs. I have never found anything that does. If anyone know of any plugin I'd love to know or if Adobe wants to build one (cough, cough) that would be great too
I came here after searching for PSB thumbnail viewer. It's a bit mind-boggling that a jpeg preview isn't stored in the header for PSB's that can be read by bridge without reading the whole file. And that the only viable solution in the whole of the digital world is a $100 subscription ?
Good morning, I came back to PrusaSlicer after years of Ideamaker and now I'm happyt with my choice! I've noticed that when I save a project (.3MF) in my "main" PC based on WIndows 10 the thumbnail doesn't appear, I see the PrusaSlicer icona instead. All my projects are in the cluod and if I see the folder containing the project from anothere PC (with PS installed, of course) the thombnails show up. Does anybody know what Windows 10 settings is neccesary to change to see the thimbnails?
If its showing the PS icon it means that file type association has been assigned to PS. I think windows normally has that associated to Open with Print 3d. If you assign the association back then you *should* get your previews back.
I have the same issue. I wouldn't mind the raw thumbnails if my pc was fast enough to load them, however its not and it lags. Can you explain the process in a little more detail? It would be most appreciated. Thanks!
No idea as to how to change raw files to icon, sorry. However, my workaround is to alter the viewing of files. In windows 10 "Photos" is, to me, a totally useless app while "Photo Gallery" is little better. I always use Bridge in Photoshop but on occasion just view in Windows 10. In Windows I use File Explorer but have tried Photo Gallery too. For folders where Raw and .jpg files are mixed I choose to view by file type and adjust ascending or descending to suit which is viewed first. It's not what you wanted but it does separate the files so you are not looking at matching pairs. This works in most editors/file-viewers I know but I could find no way to do it in Photos.
EDIT: Hmmm... after rebooting the .cr2 thumbnail previews are gone in Windows File Explorer. However, Windows Photo Viewer still displays the .cr2 file along with the .jpg when I scroll through them. Any ideas on how to delete the .cr2 preview/display in Windows Photo Viewer?
A colleague of mine (semi-pro photographer) asked me (a developer/programmer) the same question and as a lazy guy I decided to ask Goolge for help which leaded me here. I was disappointed that there were no solution to the problem so I had to dig trough windows "crappy" registry.
Windows Vista makes greater use of file-specific thumbnail images than earlier versions of Windows. Windows Vista uses them in all views, in dialogs, and for any file type that provides them. Other applications can consume your thumbnail as well. Thumbnail display has also changed. Now, a continuous spectrum of user-selectable sizes is available rather than the discrete sizes such as Icons and Thumbnails provided in Windows XP.
Thumbnails of 32-bit resolution and as large as 256x256 pixels are often used in Windows Vista UI. File format owners should be prepared to display their thumbnails at that size. They should also provide non-static images for their thumbnails that reflect the particular file's contents. For example, a text file's thumbnail should show a miniature version of the document, including its text.
The IThumbnailProvider interface has been introduced to make providing a thumbnail easier and more straightforward than in the past, when IExtractImage would have been used instead. Note, that existing code that uses IExtractImage is still valid under Windows Vista. However, IExtractImage is not supported in the Details pane. 17dc91bb1f
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