Process and device for detection of drops in a digital image and computer program for executing this method
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United States of America Patent
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Jun 16, 2015
Grant Date -
Feb 21, 2013
app pub date -
Feb 8, 2011
filing date -
Feb 9, 2010
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Abstract
Devices and methods for detecting of drops on a transparent wall through which digital image is acquired by means of an image acquisition system. The method includes establishing a gradient image from the digital image by assigning to each pixel the value of the gradient for the pixel; filtering the gradient image by assigning to each pixel a value obtained by rank filtering; and establishing a mask representing the position of the detected drops in the digital image by activating the pixels for which the difference between the value of the pixel in the filtered image and the value of the pixel in the gradient image exceeds a predetermined value.
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