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  1. #1
    aho123 is offline Member
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    Apr 2010
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    Default fingerprint ridge count?

    hello everyone.. i need a help..
    can some one help me by giving me opinions or coding to do the fingerprint ridge count method?

    thank you :)

  2. #2
    rtc1 is offline Member
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    May 2010
    northern california
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    Can you provide a URL which describes the ridge count method?

    One way to count features such as this in an image is to convert it to grayscale and then extract pixels from the image along a line (using Bresenham's algorithm backwards and using bilinear interpolation at the x,y coordinates) and then take the first derivative of this sequence of pixels. You can then step through the first derivative values and count the positive zero crossings. This may or may not work for fingerprint images.

    Another option is to look at OpenCV (which I think might have a Java port) and see if they have an appropriate algorithm you can study or use.
    Last edited by rtc1; 05-08-2010 at 05:07 AM. Reason: clarified sentence

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