METHOD AND DEVICE FOR DETECTING DROPS IN A DIGITAL IMAGE; COMPUTER PROGRAM FOR IMPLEMENTING SAID METHOD
摘要
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.
申请公布号
EP2534640(A1)
申请公布日期
2012.12.19
申请号
EP20110708538
申请日期
2011.02.08
申请人
INSTITUT FRANCAIS DES SCIENCES ET TECHNOLOGIES DES TRANSPORTS, DE L'AMENAGEMENT ET DES RESEAUX