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Insight 4G Version 11.2 Global Imaging, Acquisition, Analysis and Display Software


Insight 4G Version 11.2 is the latest version of the Global Imaging, Acquisition, Analysis and Display Software is the complete package for Fluid Mechanics research in PIV. PLIF and particle sizing measurements. 

Product Details

Insight 4G contains full hardware control from the user interface, meaning that once the hardware is turned on, image capture synchronization is controlled completely through the software.  In addition to hardware control, Insight 4G performs all types of velocity and intensity analysis with the latest state of the art algorithms for

  • Particle image velocimetry (2D PIV)
  • Stereoscopic Particle image velocimetry (stereo PIV)
  • Time-Resolved Particle image velocimetry (TR-PIV)
  • Planar Laser Induced Fluorescence (PLIF)
  • Global Sizing Velocimetry (GSV) and Spray Analysis

The software package supports many CCD, CMOS, sCMOS cameras, high speed CMOS cameras, Nd:YAG PIV laser, and high speed YLF and YAG lasers for measurements in PIV, PLIF, Time-resolved PIV and PLIF.  The pipeline approach on the Analysis portion of the software offers accessibility of the all levels of the processing and with all data saved in every steps of the process, making sure that no data is lost. 

The latest version of the software provides the approach of performing post processing of Time-Resolved data set.  Post processing occurs after the cross-correlation technique has been applied to the images, and a raw vector field has been determined. Post processing of the vector field removes spurious vectors and noise through validation and conditioning. Vectors can be validated based on nearby vectors both in space (spatial) and, in the case of time-resolved vector fields, in time (temporal).

Time-Resolved Post Processing

All of the vector validation and conditioning steps that have been covered so far have been discussed in terms of spatial neighborhoods. This means that a vector is validated or conditioned based on the values of the nearest neighbors in space. This is done because in general, in most fluid mechanics applications with appropriate spatial resolution, fluids elements near each other are behaving similarly.

If PIV data is captured at a fast enough rate, the same can be said for vectors that represent the same location in space, but at slightly different moments in time. If the capture rate of the PIV system is significantly faster than the characteristic time-scale within the flow, then the vectors close to each other temporally (in time) will also be behaving similarly and as such, these vectors may also be utilized in the validation and conditioning process.

In the example of a 3 × 3 spatial neighborhood and 1 time-step forward and 1 time-step backward, as shown in Figure 1, the result is that 26 vectors are used to determine the validity of the vector under interrogation, resulting in a vastly improved body of statistics upon which to base the determination as compared to only spatial validation (8 vectors).


Fig. 1. Local validation of a vector based on a spatial neighborhood of 3 × 3 vectors AND a temporal neighborhood of 1 time-step forward and 1 time-step backward (26 vectors contribute).

The benefit of temporal post-processing is that not only spatial noise, but also temporal noise consisting of random noise present in any vector field, can also be eliminated or reduced while simultaneously preserving the true high-frequency information (as shown in Figure 2 below).

Fig. 2. Temporal post-processing in which random noise is reduced


The spatial neighborhood as well as the temporal steps used in both the forward and backward direction are specified independently, increasing the flexibility with which the technique may be used.

For time-resolved PIV systems, temporal post-processing is a beneficial step in increasing the accuracy, eliminating noise, and reducing the uncertainty in vector fields, by increasing the number of vectors used in validation and effectively utilizing all of the information available.


The Insight 4G package is the complete package for applications in:

  • Hydrodynamics
  • Aerodynamics
  • Spray Diagnostics
  • Turbulent Research
  • Combustion Research
  • Fundamental Research and Development

Using PIV, PLIF, GSV, SSA system arrangements for measurements of velocity, sizing and shape.

Features & Benefits

  • Robust and easy to use
  • Batch macro processing across different experiments
  • Traceability of all Processing steps
  • File management streamlines
  • Full hardware control from user interface
  • Integrated TecPlot package for data manipulation and presentation
  • Matlab Dynamics Runtime for incorporation of Matlab program
  • Windows 10 and 64-bit OS