1 November 2012 An improved method for IR image filtering
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Proceedings Volume 8411, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VI; 84112Q (2012) https://doi.org/10.1117/12.970360
Event: Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies 2012, 2012, Constanta, Romania
Abstract
One of the most widely used denoising techniques with well preserving edge features in medical imaging is anisotropic diffusion filtering. It is based on the iterative solving of the diffusion equation that takes into account only the heat propagation by conduction1. At living beings, blood perfusion represents another important way to transfer the heat. In this case, we used a new equation modeling the heat propagation, mainly Pennes equation2, processing both conductive and convective heat components. Unlike heat, white noise, which accompanies the signal detected by a thermal sensor, is not a solution to this equation. The new filtering method consists in an iterative solving of bio-heat equation by using Crank-Nicolson convergent algorithm. Bazan’s criterion for stopping iterations agrees well with the behavior of this filter. The filter was tested on some theoretical models of images simulating different signals and noises, and on many thermal images of healthy people or patients suffering from different types of thyroid disorders. One image processing of a patient suffering from papillary carcinoma is shown at different time moments. The noise is rapid attenuated, and it is possible to assess the contour shape or to locate more outbreaks in a certain area, if any.
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Gheorghe Gavriloaia, Catalin Neamtu, Mariuca-Roxana Gavriloaia, "An improved method for IR image filtering", Proc. SPIE 8411, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VI, 84112Q (1 November 2012); doi: 10.1117/12.970360; https://doi.org/10.1117/12.970360
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