Commit 6dee71df authored by Richard Torenvliet's avatar Richard Torenvliet

Merge branch 'master' of github.com:taddeus/licenseplates

Conflicts:
	docs/verslag.tex
parents 76b417c4 f11ec241
This diff is collapsed.
......@@ -125,12 +125,11 @@ straight lines and simple curves, LBP should be suited to identify these.
The LBP algorithm that we implemented is a square variant of LBP, the same
that is introduced by Ojala et al (1994). Wikipedia presents a different
form where the pattern is circular, this form is convenient because with
interpolation you can choose the size of the circle \textbf{and} to how many
neighbours the circle has. That means how many times the center pixel
has to be evaluated against a neighbour.
interpolation you can choose the size of the circle \textbf{and} how many
neighbours the circle has.
In the literature there are lots of examples where LBP is used for surface
recognition, facial recognition, human face emotion recoqnition ((Pietik\"ainen, Hadid, Zhao \& Ahonen (2011)))
recognition, facial recognition, human face emotion recoqnition (Pietik\"ainen, Hadid, Zhao \& Ahonen (2011))
\begin{itemize}
\item Determine the size of the square where the local patterns are being
registered. For explanation purposes let the square be 3 x 3. \\
......@@ -195,7 +194,7 @@ Important to note is that due to the normalization of characters before
applying LBP. Therefore, no further normalization is needed on the histograms.
Given the LBP of a character, a Support Vector Machine can be used to classify
the character to a character in a learning set. The SVM uses
the character to a character in a learning set.
\subsection{Matching the database}
......@@ -205,6 +204,8 @@ histograms of an image as a feature vector. The SVM can be trained with a
subsection of the given dataset called the ''Learning set''. Once trained, the
entire classifier can be saved as a Pickle object\footnote{See
\url{http://docs.python.org/library/pickle.html}} for later usage.
In our case a support vector machine uses a radial gauss kernel. The SVM finds
a seperating hyperplane with minimum margins.
......@@ -323,7 +324,6 @@ cells are related to one histogram. All the histograms are concatenated and
feeded to the SVM that will be discussed in the next section, Classification.
\subsection{Classification}
The SVM used in our project is a Gaussian radial based function. Where the kernel is
\section{Finding parameters}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment