\def\GWPincludegraphics#1{\includegraphics[width=0.8\textwidth]{/GW/Education/ExperimentMenu/Tomography/#1}}

%\section{Goals:}

\begin{figure}[htbp]
\centering
\includegraphics{/GW/Diagnostics/Radiation/CasioEXILIMFastCameras/tomo_schema.png}
\caption{Experimental setup}
\end{figure}


The ultimate aim is to perform a good
\href{http://en.wikipedia.org/wiki/Tomographic\_reconstruction}{tomographic
reconstruction} from the
\href{/Diagnostics/Radiation/CasioEXILIMFastCameras}{two crossed
cameras}. However, firstly the most basic methods will be introduced to
you
(\href{http://en.wikipedia.org/wiki/Filtered\_back\_projection\#Dual\_transform}{Back-filtering},
\href{http://en.wikipedia.org/wiki/Algebraic\_Reconstruction\_Technique}{Algebraic
Reconstruction Technique},
\href{http://en.wikipedia.org/wiki/Abel\_transform}{Abel transformation}) and later even the state of the art methods that are used for
reconstruction in large tokamaks.

Moreover, during this task you will have a chance to develop or improve
algorithms to remove reflections from chamber (currently based on
\href{http://en.wikipedia.org/wiki/Principal\_component\_analysis}{PCA}),
detect and correct slight shifts in cameras position and reach perfect
synchronization of both cameras and the rest of tokamak diagnostics.

Some alpha versions of the scripts are already prepared but you should
improve reliability/speed/accuracy algorithms for previously mentioned
issues and if possible so rewrite them to Python. Moreover, you can try
to add the results as a standard GOLEM diagnostics.

\emph{In this task you can reach very interesting results and no
previous knowledge of the mathematical algorithms is needed. Moreover,
this task is very variable so the level can be setup according to your
knowledge and abilities.}

\begin{figure}[htbp]
\centering
\GWPincludegraphics{figs/OrigRGB.png}
\caption{Fig 1: An example of nine frames movie of shot connected to
time evolution thanks to the ``rolling shutter effect''}
\end{figure}

\begin{figure}[htbp]
\centering
\GWPincludegraphics{figs/CorrectedRGB.png}
\caption{Fig 2: An example the same frames with application of some
image processing. Background reflections are significantly suppressed
and missing stripes are ``interpolated''. Note that the camera is not
precisely perpendicular to the plasma.}
\end{figure}

\begin{figure}[htbp]
\centering
\includegraphics[width=0.7\textwidth]{/GW/Diagnostics/Radiation/CasioEXILIMFastCameras/tomografie.png}
\caption{An example of tomographic reconstruction.}
\end{figure}


