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This page contains details of the most recent Jitterbug version and its changelog as well as some addition technical details. Over time this page will also conatain any frequently asked questions not covered by the documentation. If your question is not answered below then you can always email me at .

Updates

Current Version

The most current version of the Jitterbug code is version 3.6, released on the 24th September 2013.

v3.6 Changelog

NEW online license and small performance improvements:

New online user license with no built in time limit,
Small precision improvements to the the 'fast mode'.

Known Issues:

None in present release. If users find any please email me at: .

v3.5.2 Changelog

NEW "fast mode" added, and speed and memory improvements for older systems:

Introduces a new "fast mode" when accurate instability frequency-spectrum is not required,
Significant speed increase for users running Matlab 2012a and older (up to 47% faster),
Improved memory usage, especially for images 1024px and larger,
Added compatability with FEI *ser format (module by Peter Ercius at NCEM),
Small efficiency improvements to the module sequence,
Fixed a display issue in the drift-correction module window.

v3.4.4 Changelog

Update to new peak-finding engine and better Mac compatibility:

Updated to the newest 2.0.4 peak-finding engine, now nano-particle and wedge compatible,
Removed the use of OpenGl software graphics rendering mode (for better Mac compatibility),
Fixed a bug that could cause a crash when drift correction was set to off and no manual drift was specified.

v3.4.3 Changelog

Important module-dependency and performance update:

Removed the dependency on the MatLab Curve Fitting and Statistics toolboxes,
Added the new ability to open files from any location for processing,
Significant speed increase in resolution quantification stage (≈50% faster),
Fixes an issue that could cause a crash with certain non-square images,
Other small typos and bugs fixed.

Supported File Types

Gatan Digital Micrograph - .dm3 .
FEI Tia Format - .ser .
Graphics Interchange Format - .gif .
Joint Photographic Experts Group - .jpg * .
MatLab Variable File - .mat ^† .
Bitmap File - .bmp .
Text File - .txt .

* Note, using a lossey compressed format such as JPEGs are not reccomended as processing of compressed images will severly limit performance.
^† If using a MatLab .mat file, the file must contain only a single variable with the image as a m x n matrix.

Frequently Asked Questions:

Does the integrated column intensity change with post-processing?

Answers:

Does the integrated column intensity change with post-processing?

The total (integrated) intensity of each atomic column in a test image has been tested. The mean of the integrated intensity was found to be larger by less than 0.7% compared with the raw image. Additionally the standard deviation over many columns was seen to fall by approximately 0.9% suggesting that the processed integrated intensity may be more precise as well as more accurate. This verifies that quantitative work is not affected but the post-processing and may even be improved.