The output can be converted to time and length (in mm say) using the rulers to get a scale (mm per pixel say) and the frame rate of the video. The ‘redness’ of the liquid is the key here: the video is split into RGB and the red channel isolated and converted to black and white once a filter is applied. This image is then scrubbed to get rid of any objects smaller than a threshold size, leaving only the liquid of the column. The image is then split in two at the centre of the bounding box to analyze each column separately. Since a black and white image is represented by a matrix of 1 and 0s, summing the columns of the matrix (ie the vertical direction) gives the column height in pixels. A few other adjustments are needed, but that’s the basic idea.

• FEBeam: a finite element beam analysis package;
• TrussMaster: a truss analysis package.

These programs are close to fully-fledged but there are still some rough edges. Also made available are:

• TrussGenerator: an auxilliary program to TrussMaster;
• Steel Section DB: a steel sections database in VB;
• Graph Displacements: of a beam element;
• Operations: machine-dependent operator timing (+,-,x,/).

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• Nelder-Mead simplex algorithm;
• Runge-Kutta, 4th order program;
• Generalized Extreme Value distribution fitting program;
• Machine Epsilon calculator;
• Matrix class based on STL;
• Monte Carlo calculation of pi;
• Square root of a matrix program;
• Steelbeam analysis program.

The Visual Basic section has also been updated, with some nice little apps and scripts for download:

• Recently Used Files module;
• EC5 Joist design program;
• Linear Simultaneous Equations solution program;
• Stochastic Beam Design program.

Some of the above programs are basic whilst others have hard-to-find algorithms encoded. If you check a program out give me some feedback!

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Thanks to those who are checking it out.

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