ZoomBrowser Ex thumbnail cache - Revision history

Sembiance: /* Sample files */

2024-12-14T00:34:10Z

‎Sample files

Thorsted: Updated PRONOM

2021-11-10T18:54:14Z

Updated PRONOM

Thorsted at 21:55, 7 January 2021

2021-01-07T21:55:35Z

Jsummers: Categorize

2016-05-08T15:58:06Z

Categorize

Jsummers: Category:JPEG

2014-09-19T00:44:17Z

Category:JPEG

Jsummers at 21:24, 3 September 2014

2014-09-03T21:24:47Z

Dan Tobias: /* See Also */

2014-07-16T11:59:33Z

‎See Also

Ross-spencer: Link to the Canon website.

2014-07-16T08:16:09Z

Link to the Canon website.

Ross-spencer: Initial entry for ZbThumbnail.info

2014-07-16T01:34:10Z

Initial entry for ZbThumbnail.info

New page

{{FormatInfo
| formattype=electronic
| subcat=Graphics
| extensions={{ext|info}}
}}
'''ZoomBrowser Ex thumbnail cache''' (ZbThumbnail.info) is a file output by '''Canon's''' [http://web.canon.jp/imaging/software/zbex5-e/ ZoomBrowser Ex] [http://en.wikipedia.org/wiki/Image_organizer image organizing] application.

== Digital Preservation Notes ==

Documentation on the file is lacking but it's purpose seems to be to support the display of image thumbnails in the Zoombrowser Ex application. Images are indexed and a lower resolution version created, and stored in the file, to be rendered as a thumbnail in the Zoombrowser window. ZbThumbnail files are created for each folder that is indexed by the tool. The file is created as a Windows 'hidden' file and its existence would not be known by the majority of users with a default configuration in Microsoft Windows. The file might contain information not elsewhere present in the Windows system. For example, even in a folder with no images, its existence suggests that images were once present and viewed using Zoombrowser Ex.

Thumbnail files can be extracted from the object using forensic techniques and we can see what was once there and indexed. The file also seems to maintain a textual component, e.g. the corresponding file names for the images, and in some cases it seems that more file names exist than thumbnails. This is difficult to verify without an open specification for the object. The user would have little or no knowledge of this file, or its content.

This file supports ZoomBrowser Ex, an application independent to Microsoft Windows.

== Thumbnail Extraction ==

The majority of the payload of the object are the thumbnails themselves. The last byte of the file is the trailing bytes of the last plain-encoded JPEG thumbnail file 0xFF 0xD9. The images can be extracted by searching for the opening bytes of a JPEG 0xFF 0xD8 and reading the following bytes up to a corresponding footer - this process is then repeated for the entire file.

Work needs to be done to understand if the file maintains a count of the number of objects one should be able to extract.

Work also needs to be done to understand how to pair image objects with their corresponding file names.

== See Also ==

[https://github.com/ross-spencer/zbthumbnail-extractor ZbThumbnail.info JPEG extractor code in Python]

@@ Line 29: / Line 29: @@
 == Sample files ==
 * Examples can be found by searching the web for [https://www.google.com/search?q=%22index+of%22+zbthumbnail "index of" zbthumbnail].
 == Links ==

@@ Line 4: / Line 4: @@
 | extensions={{ext|info}}
 |wikidata={{wikidata|Q28205475}}
 }}
 '''ZoomBrowser Ex thumbnail cache''' (ZbThumbnail.info) is a file output by Canon's [http://web.canon.jp/imaging/software/zbex5-e/ ZoomBrowser Ex] [http://en.wikipedia.org/wiki/Image_organizer image organizing] application.

← Older revision		Revision as of 15:58, 8 May 2016
Line 34:		Line 34:

	[[Category:JPEG]]		[[Category:JPEG]]
		+	[[Category:File formats with a distinctive filename]]

@@ Line 16: / Line 16: @@
 == Thumbnail Extraction ==
-The majority of the payload of the object are the thumbnails themselves. The last byte of the file is the trailing bytes of the last plain-encoded JPEG thumbnail file 0xFF 0xD9. The images can be extracted by searching for the opening bytes of a JPEG 0xFF 0xD8 and reading the following bytes up to a corresponding footer - this process is then repeated for the entire file.
+The majority of the payload of the object are the thumbnails themselves. The last byte of the file is the trailing bytes of the last plain-encoded [[JPEG]] thumbnail file (<code>0xFF 0xD9</code>). The images can be extracted by searching for the opening bytes of a JPEG (<code>0xFF 0xD8</code>) and reading the following bytes up to a corresponding footer - this process is then repeated for the entire file.
 Work needs to be done to understand if the file maintains a count of the number of objects one should be able to extract.
@@ Line 32: / Line 32: @@
 * [https://github.com/ross-spencer/zbthumbnail-extractor ZbThumbnail.info JPEG extractor code in Python]
 * [http://usa.canon.com/cusa/consumer/standard_display/utility_browser Canon ZoomBrowser Ex]

@@ Line 22: / Line 22: @@
 Work also needs to be done to understand how to pair image objects with their corresponding file names.
-== See Also ==
+== Links ==
-[https://github.com/ross-spencer/zbthumbnail-extractor ZbThumbnail.info JPEG extractor code in Python]
+* [https://github.com/ross-spencer/zbthumbnail-extractor ZbThumbnail.info JPEG extractor code in Python]
-[http://usa.canon.com/cusa/consumer/standard_display/utility_browser Canon ZoomBrowser Ex]
+* [http://usa.canon.com/cusa/consumer/standard_display/utility_browser Canon ZoomBrowser Ex]

@@ Line 4: / Line 4: @@
 | extensions={{ext|info}}
 }}
-'''ZoomBrowser Ex thumbnail cache''' (ZbThumbnail.info) is a file output by '''Canon's''' [http://web.canon.jp/imaging/software/zbex5-e/ ZoomBrowser Ex] [http://en.wikipedia.org/wiki/Image_organizer image organizing] application.
+'''ZoomBrowser Ex thumbnail cache''' (ZbThumbnail.info) is a file output by Canon's [http://web.canon.jp/imaging/software/zbex5-e/ ZoomBrowser Ex] [http://en.wikipedia.org/wiki/Image_organizer image organizing] application.
 == Digital Preservation Notes ==
-Documentation on the file is lacking but it's purpose seems to be to support the display of image thumbnails in the Zoombrowser Ex application. Images are indexed and a lower resolution version created, and stored in the file, to be rendered as a thumbnail in the Zoombrowser window. ZbThumbnail files are created for each folder that is indexed by the tool. The file is created as a Windows 'hidden' file and its existence would not be known by the majority of users with a default configuration in Microsoft Windows. The file might contain information not elsewhere present in the Windows system. For example, even in a folder with no images, its existence suggests that images were once present and viewed using Zoombrowser Ex.
+Documentation on the file is lacking but its purpose seems to be to support the display of image thumbnails in the Zoombrowser Ex application. Images are indexed and a lower resolution version created, and stored in the file, to be rendered as a thumbnail in the Zoombrowser window. ZbThumbnail files are created for each folder that is indexed by the tool. The file is created as a Windows 'hidden' file and its existence would not be known by the majority of users with a default configuration in Microsoft Windows. The file might contain information not elsewhere present in the Windows system. For example, even in a folder with no images, its existence suggests that images were once present and viewed using Zoombrowser Ex.
 Thumbnail files can be extracted from the object using forensic techniques and we can see what was once there and indexed. The file also seems to maintain a textual component, e.g. the corresponding file names for the images, and in some cases it seems that more file names exist than thumbnails. This is difficult to verify without an open specification for the object. The user would have little or no knowledge of this file, or its content.
@@ Line 21: / Line 21: @@
 Work also needs to be done to understand how to pair image objects with their corresponding file names.
 == Links ==

← Older revision		Revision as of 08:16, 16 July 2014
Line 25:		Line 25:

	[https://github.com/ross-spencer/zbthumbnail-extractor ZbThumbnail.info JPEG extractor code in Python]		[https://github.com/ross-spencer/zbthumbnail-extractor ZbThumbnail.info JPEG extractor code in Python]
		+	[http://usa.canon.com/cusa/consumer/standard_display/utility_browser Canon ZoomBrowser Ex]