In this application video, a 6-cam 5 Mpx MulticamDIC system is used to measure the total displacement
(with Rigid Body Motion Removed) and shear strain XY of a 3D-printed Cylindrical Specimen in the new Istra4D V4.13 software.New features from the Istra4D V4.13 software presented in this application video include;
- New HDF5 Image Compression Options, allowing faster saving of data or smaller data sets to be acquired
- Startpoint Enhancements, using a new User-Interface (UI) and faster & more intuitive search algorithm
- Smart Colorbars, in each camera visualization new colour bars and colour step-levels can be quantified
In the live setup mode, each view from all 6 cameras is presented for which the circular arrangement around a
central cylinder can be seen.When using a MulticamDIC system, the Speckle Pattern Quality Evaluator and variable Region-of-Interest (RoI)
settings can still be used in live mode, for all 6 cameras.Within the live projection calibration mode, the projection of all 6 cameras is completed together. Including automatic
QR-code detection of the calibration target ID, each camera also automatically detects the grid intersection points of
the calibration target and acquires a snapshot. The number of frames acquired per camera is shown in the first indexed
number and the number of total frames acquired for all cameras within the calibration is shown in the second indexed
number. The computation of the projection parameters is determined, live, online during the calibration itself with a live
feedback status.Using the ringbuffer recording mode, 455 frames are saved pre-trigger and 2 frames are saved post-trigger at the current
acquisition speed of 10 fps. As such, the pre/post-trigger is acquired after the specimen has already fractured. New HDF5
Image Compression Options, in Istra4D V4.13, allow users to save the images in different compressed formats for either
speed or data space. Selection of LZ4, for example, is 4x faster than the default compression format, as such, the measurement
is saved in 15 seconds instead of 1 minute.In the correlation evaluation, the alignment of the facets/subsets is selected to be with respect to an object as opposed to
a reference camera plane. This allows parameterization alignment of the facets/subset to be that of an idealized model
– for this case a cylinder.Additionally, within the correlation evaluation, the new Startpoint Enhancements feature of Istra4D V4.13 can be seen.
Utilizing a new UI with an upper table (step/startpoint) and lower table (camera/startpoint), a quick and clear overview of
which startpoints have been found is now easy to see. As shown in the application video, only 3 startpoints are actually
used for the measurement (Startpoint 20 in Cameras 1-3, Startpoint 21 in Cameras 3-5, and Startpoint 22 in Cameras 5-6)In the graphical visualization, the 2D-overlay of the total displacement (with Rigid Body Motion Removed) can be seen.
Additionally, the shear strain XY can also be viewed. The new Smart Colorbars feature in Istra4D V4.13 is also presented,
whereby for each selected camera view visualization, the color palette and quantification of colour levels can be adjusted.
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