Showing papers by "Salviano Soares published in 2007"

Signal Reconstruction Techniques Applied to High Frame Rate Sequences

Abstract: Nowadays there are specific video equipments which allow acquisition at very high frame rates, eg, up to 5000 fps When observing a high frame rate sequence, it becomes noticeable that a great percentage of the frames' pixels values do not suffer great changes along the sequence Hence, if a pixel's value remains the same, then a unique sample is enough to represent that particular pixel over several frames Only pixels that suffer great variations require a higher number of samples to be correctly represented This work reports a methodology that combines compression and reconstruction techniques to evaluate an alternative to the traditional compression methods 25/30 fps In the proposed method, sets of pixels are extracted along the temporal direction and by exploiting the high temporal correlation of the signals, a proper decimation process is applied in order to create a sequence with a lower number of frames and consequently smaller file size The main objective is to propose a new compression methodology that will take advantage of the signal characteristics using both compression and reconstruction techniques