Image analysis – Applications – Motion or velocity measuring
Reexamination Certificate
2006-12-12
2006-12-12
Johns, Andrew W. (Department: 2624)
Image analysis
Applications
Motion or velocity measuring
C382S199000
Reexamination Certificate
active
07149328
ABSTRACT:
Each frame of time-series pictures shot by a camera is converted to a spatial differential frame picture by the following equations:in-line-formulae description="In-line Formulae" end="lead"?H(i,j)=Σ|G(i+di,j+dj)−G(i,j)|/(Gi,j,max/Gmax),in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?I=Gmax/{1+exp(−0.02(H−80))},in-line-formulae description="In-line Formulae" end="tail"?where Σ denotes a sum over di=−1 to 1 and dj=−1 to 1, Gi,j,max denotes the maximum pixel value of 3×3 pixels having its center at the i-th row and j-th column, and Gmax denotes the assumable maximum value 255 of the pixel value G(i, j). Moving objects at a time t is discriminated based on a correlation between spatial differential frame pictures at times (t−1) and t and a discrimination result of moving objects included in the spatial differential frame picture at the time (t−1).
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Kamijo Shunsuke
Sakauchi Masao
Johns Andrew W.
Staas & Halsey , LLP
The Foundation for the Promotion of Industrial Science
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