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Taddeüs Kroes
licenseplates
Commits
368157b8
Commit
368157b8
authored
Dec 22, 2011
by
Jayke Meijer
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Added description on fautly classifications.
parent
699fb978
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docs/report.tex
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368157b8
...
@@ -204,7 +204,8 @@ In our case the support vector machine uses a radial gauss kernel function. The
...
@@ -204,7 +204,8 @@ In our case the support vector machine uses a radial gauss kernel function. The
\section
{
Implementation
}
\section
{
Implementation
}
In this section we will describe our implementation in more detail, explaining
In this section we will describe our implementation in more detail, explaining
the choices we made in the process.
the choices we made in the process. We spent a lot of attention on structuring
the code in such a fashion that it can easily be extended.
\subsection
{
Character retrieval
}
\subsection
{
Character retrieval
}
...
@@ -528,6 +529,27 @@ grid-searches, finding more exact values for $c$ and $\gamma$, more tests
...
@@ -528,6 +529,27 @@ grid-searches, finding more exact values for $c$ and $\gamma$, more tests
for finding
$
\sigma
$
and more experiments on the size and shape of the
for finding
$
\sigma
$
and more experiments on the size and shape of the
neighbourhoods.
neighbourhoods.
\subsubsection*
{
Faulty classified characters
}
As we do not have a
$
100
\%
$
score, it is interesting to see what characters are
classified wrong. These characters are shown in appendix
\ref
{
faucla
}
. Most of
these errors are easily explained. For example, some 0's are classified as
'D', some 1's are classified as 'T' and some 'F's are classified as 'E'.
Of course, these are not as interesting as some of the weird matches. For
example, a 'P' is classified as 7. However, if we look more closely, the 'P' is
standing diagonal, possibly because the datapoints where not very exact in the
XML file. This creates a large diagonal line in the image, which explains why
this can be classified as a 7. The same has happened with a 'T', which is also
marked as 7.
Other strange matches include a 'Z' as a 9, but
this character has a lot of noise surrounding it, which makes classification
harder, and a 3 that is classified as 9, where the exact opposite is the case.
This plate has no noise, due to which the background is a large area of equal
color. This might cause the classification to focus more on this than on the
actual character.
\subsection
{
Speed
}
\subsection
{
Speed
}
Recognizing license plates is something that has to be done fast, since there
Recognizing license plates is something that has to be done fast, since there
...
@@ -689,12 +711,13 @@ were instantaneous! A crew to remember.
...
@@ -689,12 +711,13 @@ were instantaneous! A crew to remember.
\appendix
\appendix
\section
{
Faulty Classifications
}
\section
{
Faulty classified characters
}
\label
{
faucla
}
\begin{figure}
[H]
\begin{figure}
[H]
\hspace
{
-2cm
}
\hspace
{
-2cm
}
\includegraphics
[scale=0.5]
{
faulty.png
}
\includegraphics
[scale=0.5]
{
faulty.png
}
\caption
{
Faulty classificati
ons of
characters
}
\caption
{
Faulty classificati
ed
characters
}
\end{figure}
\end{figure}
\begin{thebibliography}
{
9
}
\begin{thebibliography}
{
9
}
...
...
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