Image analysis – Applications – Personnel identification
Reexamination Certificate
2011-05-17
2011-05-17
Ahmed, Samir A (Department: 2624)
Image analysis
Applications
Personnel identification
C382S162000, C382S167000, C358S426010
Reexamination Certificate
active
07945075
ABSTRACT:
Converting a digital image from color to gray-scale. In one example embodiment, a method for converting a digital image from color to gray-scale is disclosed. First, an unconverted pixel having red, green, and blue color channels is selected from the color digital image. Next, the red color channel of the pixel is multiplied by α. Then, the green color channel of the pixel is multiplied by β. Next, the blue color channel of the pixel is multiplied by γ. Then, the results of the three multiplication operations are added together to arrive at a gray-scale value for the pixel. Finally, these acts are repeated for each remaining unconverted pixel of the color digital image to arrive at a gray-scale digital image. In this example method, α+β+≈1 and α>β.
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Lu Juwei
Thiyagarajah Mohanaraj
Zhou Hui
Ahmed Samir A
Bayat Ali
Seiko Epson Corporation
Watson Mark P.
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