PIVlab 2.61

Sorry, but two bugs were introduced in 2.60 and are fixed in 2.61:

• Background subtraction didn't work properly on MATLAB R2022b. (https://groups.google.com/g/pivlab/c/dFdMPO47FRo)
• Data export to e.g. text file (and probably other ascii formats like Tecplot, Paraview etc) didn't work properly. (https://groups.google.com/g/pivlab/c/e93bap_JLQA)
• Vector validation could fail if all except one vector are filtered out. (https://groups.google.com/g/pivlab/c/x4845jqeJps)

Sorry for the inconveniences, I hope I got everything right now.

Full Changelog: 2.60...2.61

PIVlab 2.60

Huge speed (up to factor 3) and memory improvements were contributed by coding pro Maarten from Vortech.nl . The company was hired by Mathworks to enhance the user experience of popular Matlab toolboxes. This is pretty cool I think!

Here is some background information:
https://pivlab.blogspot.com/2022/11/significant-speed-and-memory.html

Changes / Improvements:

• Huge speed, memory and general code improvements in FFT_multi.m (Maarten, vortech.nl)
• Slight bug fixes with the final grid position (Maarten, vortech.nl)
• Calibration: Added possibility to enter reference distance in pixels by hand
• Background image subtraction processing runs in parallel now
• 'Time left' estimation for parallel processing
• Image acquisition: ROI selection added to basler cam
• Image acquisition: Added OPTOcam 2/80 (our first own camera!) including remote focus control
• Image acquisition: Made acquisition log more useful

What's Changed

Full Changelog: 2.59...2.60

PIVlab 2.59

• Fixed a bug where derivatives were calculated incorrectly when x-axis or y-axis direction were inverted during calibration.
• Fixed a bug where video export with colorbar didnt work
• Added possibility to export the preprocessed image (button in pre-processing tab)
• Image acquisition: Added FLIR camera to image acquisition module.
• Image acquisition: Added pulse length display in GUI
• Image acquisition: Added check to the "interframe time" text field: Every camera has its minimum interframe time, this is now checked and adjusted.
• Image acquisition: Improved connection via laser_device_id: Now onlin…e lasers are scanned during connection. When there is a mismatch between saved laser id and found laser id, then a msgbox appears that allows to adjust the laser device id. Also added msgbox when no laser at all is found.
• Image acquisition: Added hint to PIVlab hardware and tutorial video

Full Changelog: 2.58...2.59

PIVlab 2.58

Added Basler camera support in image acquisition (requires Matlabs image acquisition toolbox).

Changelog:
2.57...2.58

PIVlab 2.57

• Added PIVlab batch sessions
• Added Chronos camera to image acquisition
• Added autofocus to Chronos camera
• Added device ID to all laser systems
• Fixed a bug where grayscale colormap was accidentally used
• Fixed a bug on Linux systems
• Added error msgbox when interrogation area is too large for selected ROI

Full Changelog: 2.56...2.57

PIVlab 2.56

Small update:

• Added Pulsed Laserdiode to image acquisition
• Auto-correlation stretch bug fix
• Added image size consistency check
• Colorbar scaling issue fixed
• Preventing unwanted start up of parpool when post-processing
• Made colorbar unclickable
  Full changelog

PIVlab 2.55

PIVlab:

• use single as variable class for cross-correlation operations (saves 50% RAM)
• Fixed velocity limit scatter plot bug appearing in R2021b
• Fixed bug with mat file export
• calibration offsets plotting tweak
• Made scatterplot markers in velocity limit display smaller.
• Ensemble correlation single pass didnt work. Works now.

Image acquisition:

• Image sharpness indicator shortcut
• Lens control added (focus, aperture and light)
• Auto focus added
• Added live histogram
• Added camera angle (pitch and roll) feedback
• Rearranged some UI elements in image capture
• New ROI selection in image capture (context menu, user defined sizes)
• Calibration images are saved only when explicitely desired
• Moved image acquisition files to a seperate folder

Full Changelog: 2.54...2.55

PIVlab 2.54

• Added correlation coefficient based filter
• Added velocity magnitude notch filter
• Added option to select image interpolation
• Added option to select the amount of colormap steps
• Added speed comparison between serial and parallel computing
• Added external device control
• Filenamebox now works correctly after loading session or settings
• Added pco.panda 26 DS camera model
• Added camera ROI selection + presets
• Added camera FPS estimation
• Calibration: Optimizing the display can be disabled now
• Parallel computing: The amount of cores to use is now an input argument to PIVlab_GUI: PIVlab_GUI(7) will try to use 7 cores. PIVlab_GUI(0) or PIVlab_GUI(1) will stop using parallel computing. PIVlab_GUI without input arguments will try to use the maximum amount of available cores when no pool exists, or use the existing pool without changes.
• Updated example files
• Made error message when image processing toolbox is missing somewhat clearer and more prominent
• Added pixel binning for pco.panda
• Fixed realtime piv for pco.panda
• Improved performance of data saving and max. framerate
• Image acquisition tweaks (e.g. crosshair)
• Automatic limit stretching: Fixed bug with color images
• Fixed post processing bug

PIVlab 2.53

• Post-processing of data (vector validation) has been made significantly faster, and supports parallel processing now
• Added "repeat last pass" option to GUI: This will repeat the last pass until the difference to the previous pass is below a user-defined threshold. This will not improve the displacement estimate on good PIV images. But for some cases with e.g. a lot of motion blur, the displacement estimate will be better.
• Tweaked image capture UI
• Improved real-time PIV in image acquisition
• Cleaned up code a bit
• Fixed bug: Correlation coefficient not working with parallel computing enabled
• Fixed bug in ensemble correlation when autocorrelation was disabled and interrogation windows were smaller than 8 pixels.
• Added an easier option to output correlation matrices. If you want to have all correlation matrices, edit PIVlab_GUI.m, and set "do_correlation_matrices" to 1. Then, the correlation matrices will be written to the workspace.
• added additional version update check to discriminate between users with and without parallel computing toolbox
• added 'starred feature' message to make user aware of important new features when an update was released
• Updated citing information as my new paper was published in Journal of Open Research Software

PIVlab 2.50

New features:

• Support for parallel processing!
• Support for controlling synchronizer, laser and camera directly in PIVlab!