- ...Perrig
- aperrig@di.epfl.ch
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- ...Gros
- Bertrand.Gros@di.epfl.ch
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- ...Bruschini
- Claudio.Bruschini(AT)epfl.ch
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- ...Mächler
- maechler@di.epfl.ch
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- ...meter
- Typically 0.2 - 0.3 meter
under ``normal'' conditions
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- ...depth
- When calculating the time
necessary to see structures x meters deep, we should not forget that
the returning signal also needs to traverse those x meters, doubling
the recording time
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- ...EMPA
- EMPA is the Eidgenössische
Material Prüfanstalt, Federal Material Testing Agency
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- ...bit
- The 8 bit signify that the intensity values
are encoded with 8 bit precision
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- ...hyperbola
- By geometric
construction, it can be shown that a point scatterer appears as a
hyperbola on the GPR image, having an opening of 9#9 and the
parameters a=1 and b=1
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- ...filter
- A 5 by 3
median filter takes a neighborhood of 5 pixels in the vertical and 3
pixels in the horizontal direction. Those 15 pixels are sorted after
their intensities and the 8th pixel (the median) in that sorted list
will replace the current pixel in the image
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- ...image
- In the real case, we use a neuron with a continuous output,
where values greater than 0.6 represent yes, outputs less than 0.4 no
and ``don't know'' in between
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- ...quality
- Good quality means ``hand chosen'' and that the position of
the mine is well known
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