visnow.org – Generic visualization and data processing framework in Java

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VisNow is an open-source dataflow driven modular visual data analysis platform with extensive data processing and scientific visualization capabilities. Written entirely in Java serves as an alternative to other existing generic visualization platforms. It is easily extendable to incorporate new modules and module libraries.

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Generic visualization platform

Easily perform visual analysis or make stunning scientific visualizations from your own data of any kind.

High-level modules

Forget about fine-grained modules and simplify your processing and visualization network with complex modules of broad functionality.

Advanced data processing

Perform calculations on whole data fields or data components with automated parallelization and physical units support!

Read-and-watch

Instantly get a visual representation of all data fields on each processing level with mapping controlled independently in modules.

Large datasets support

VisNow processes and visualizes regularly structured grids and point clouds with multivariate data and as much as 2^61 nodes thanks to the JLargeArrays library.

Intelligent defaults

Get reasonable default parameters automatically prepared to support instant visualization.

VisNow shows its capabilities both as pre-processing and visualization tool. Sub-voxel precision geometry of the coronary arteries was extracted from patient’s Computed Tomography (CCTA), serving as input to CFD simulation. The results are visualized within VisNow, showing blood flow in the artery segment with functionally significant stenosis, the surrounding tissues and a centerline analysis graph.

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VisNow concept was initially designed in the early 2000s by Dr Krzysztof Nowiński, based on his decades of experience in using computer graphics to visualize scientific data. The main reason VisNow was born were the limitations of the existing visualization platforms, significantly in High-Performance Computing.

VisNow is a generic framework for scientific visualization and visual data analysis. It follows a paradigm of a modular, dataflow driven system, where modules serve as functional nodes providing certain functionality in the visualization pipeline (e.g. data access, filtration, mapping, presentation), and connections between modules represent data. It is written entirely in Java programming language and is easily extendable to incorporate new modules and module libraries.

It was originally designed, developed and distributed as open-source software by the Laboratory of Visual Analysis at the Interdisciplinary Centre for Mathematical and Computational Modelling (University of Warsaw) where all the conceptual work and programming took place. Until 2020 approximately 1 million lines of code and 2,500 Java classes were developed around this project by ICM team to answer visualization and image processing needs of the scientific community.

In December 2019 visnow.org association was founded as a Non-Government Organisation in Poland with the goals of scientific visualization methods popularization, open visualization software development and promulgation and development of domain applications of visual methods, in particular within medicine and biomedicine.
Since then visnow.org confederates contributors for VisNow development and as a community supports source code and distribution of VisNow and its core libraries.

Numerical weather forecast data are extremely full of challenges. Almost 1TB forecast snapshot has multivariate time-dependent data on a non-uniform geometry grid with a variety of physical units. VisNow provides the capabilities of physically correct computations and visualization utilizing several visual degrees of freedom. Here, a 2D + time visualization of pressure isosurface, wind lines and precipitation glyphs provide insight into simulation results (also for visual debugging).

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VisNow v1.4.0 now available!

2020-10-292023-08-01 Bartosz Borucki

The first release of VisNow under the visnow.org brand is now available for download. [...]

Welcome to visnow.org

2020-10-162023-08-01 Bartosz Borucki

We would like to welcome all visitors to our new web page! [...]

The image shows the results of the finite element solution of the Poisson-Boltzmann equation around an DNA oligomer in a standard physiological solution. A planar cut of the computational area is shown - note variable grid density together with the isopotential lines. The van der Waals molecule surface colored by the potential values is also shown.

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