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Ernst Niggli edited res_cluster.md
over 9 years ago
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Clustering is performed in two steps. First, pixel events are distributed into groups according to their shape i.e., clustering is done on the matrix \(E^s\). This is possible because, although the function used for fitting various release events (e.g., sparks or waves) is the same, the shape parameters of a event approximating a spark are likely to be more similar to other spark events rather than wave events. This is clearly visible on Figure \ref{fig:linescan}A where ...
In the second clustering step, the \(E^p\) matrix is processed for each shape group and clusters of spatiotemporally close events are obtained. An example of results of this positional clustering
are is shown on Figure \ref{fig:linescan}B where events making up single sparks are depicted in various shades of orange. A single wave is shown in blue. Events that failed to be classified are black. Events that fail to be classified in either the shape or positional clustering steps are essentially filtered out as invalid events.
With this two-step approach, release events of various types consisting
on of elementary events from multiple pixels are obtained.