1 research outputs found
Removing rain streaks by a linear model
Removing rain streaks from a single image continues to draw attentions today
in outdoor vision systems. In this paper, we present an efficient method to
remove rain streaks. First, the location map of rain pixels needs to be known
as precisely as possible, to which we implement a relatively accurate detection
of rain streaks by utilizing two characteristics of rain streaks.The key
component of our method is to represent the intensity of each detected rain
pixel using a linear model: , where is the observed
intensity of a rain pixel and represents the intensity of the background
(i.e., before rain-affected). To solve and for each detected
rain pixel, we concentrate on a window centered around it and form an
-norm cost function by considering all detected rain pixels within the
window, where the corresponding rain-removed intensity of each detected rain
pixel is estimated by some neighboring non-rain pixels. By minimizing this cost
function, we determine and so as to construct the final
rain-removed pixel intensity. Compared with several state-of-the-art works, our
proposed method can remove rain streaks from a single color image much more
efficiently - it offers not only a better visual quality but also a speed-up of
several times to one degree of magnitude.Comment: 12 pages, 12 figure