Ellipse-fitting techniques applied to 2D-PMS raindrop images
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An ellipse-fitting technique is introduced in this paper to process the images of raindrops sampled by a 2D-PMS (Particle Measuring Systems, Inc.) probe. Algorithms to estimate size, shape, and orientation parameters of partial raindrop images are presented. This technique is evaluated by fitting full raindrop images and comparing the results with other procedures such as Fourier descriptor and moment descriptor methods. It is also evaluated by applying this procedure to partial raindrop images constructed by truncating the top part or the bottom part of full raindrop images, while at the same ...