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### Region detection  Before it is possible to fit the fluorescence signal from each pixel with a transient function, candidate regions containing possible events must be detected. For this we have modified a continous wavelet transform based peak detection algorithm by Du et al.,\cite{Du_2006}. al.\cite{Du_2006}.  Whereas the the original algorithm of Du et al. provides the location of the peak, we have extended it to also yield the the width of the peak. The original algorith works by joining the wavelet transform values along local maxima for increasing window lengths. Ridge lines obatained in this manner are taken to correspond to peaks if they satisfy certain criteria (length of the ridge, SNR, etc.) In our extension the width of the peak is obtained from finding the first maximum of the wavelet transform values along the ridge line.