PIVlab Versions Save

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:

• 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: https://github.com/Shrediquette/PIVlab/compare/2.54...2.55

• 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

• 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

New features:

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

Just a logo update...

Added button to display the background image. Pressing button again toggles between backgound A and B.

New features:

• Implemented image based filtering: Filter out regions with low contrast or with bright objects automatically ** The tutorial has been updated and mentions this new feature: https://pivlab.blogspot.com/p/blog-page_19.html
• New calibration that allows to reverse axes directions and specify offsets
• Checkbox added to disable vector display
• The 'red x' indicating masked regions will now disappear if mask transparency is set to 100%
• Extract data: Polyline coordinates can now be saved, (modified manually) and loaded.
• Contrast in calibration images is increased dramatically
• ROI will be cleared only if image size of the imported images is different from previous image sizes

Bug fixes:

• Fixed missing video file when loading session on a different computer
• Fixed incompatibilities with older matlab releases when using higher correlation robustness
• Fixed bug when session was loaded and colorbar is selected
• Fixed some bugs that didn't exist before...

• Background subtraction works better with different variable formats.
• Limit peak search area added: In FFT multi, previous pathes now have more importance when looking for the peak. This slightly reduces erroneous vectors, as previous passes usually have a larger interrogation area and therefore a better s2n.
• Added example video (mp4).
• Handling og loading previous working pathes improved.
• Changes how differences to released versions are displayed.
• Image variable classes (uint8 uint16, single, double) are not modified anymore. The cross-correlation and the image enhancements are done with the original variable classes.
• PIVlab_Quickview was enhanced slightly, e.g. with PIV calculator.

• Background GUI removed, background subtraction now in PIVlab itself. No extra images need to be saved anymore
• Added new sequencing style that is useful for Background-Oriented Schlieren imaging (A-B, A-C, A-D, ...)
• Small tweaks in PIVlab_Quickview
• Small tweaks with session loading and saving
• Small tweaks for enhancing compatibility with old matlab releases
• Wiener Denoise filter now additionally applies gaussian lowpass
• Fixed problem with ensemble correlation and b16 images