%0 Journal Article
	%A Sakol Udomsiri and  Masahiro Iwahashi
	%D 2008
	%J International Journal of Electronics and Communication Engineering
	%B World Academy of Science, Engineering and Technology
	%I Open Science Index 24, 2008
	%T Design of FIR Filter for Water Level Detection
	%U https://publications.waset.org/pdf/10470
	%V 24
	%X This paper proposes a new design of spatial FIR
filter to automatically detect water level from a video signal of
various river surroundings. A new approach in this report applies
"addition" of frames and a "horizontal" edge detector to distinguish
water region and land region. Variance of each line of a filtered
video frame is used as a feature value. The water level is recognized
as a boundary line between the land region and the water region.
Edge detection filter essentially demarcates between two distinctly
different regions. However, the conventional filters are not
automatically adaptive to detect water level in various lighting
conditions of river scenery. An optimized filter is purposed so that
the system becomes robust to changes of lighting condition. More
reliability of the proposed system with the optimized filter is
confirmed by accuracy of water level detection.
	%P 2663 - 2668