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(A) Mean values with 95% confidence intervals (estimated as 1.96 times standard error) of absolute pulse rate estimation error and (B) share of epochs with absolute error below 7 BPM for G-R, POS and CHROM methods across Sessions 1-8. Note that the large error of CHROM method apparent in panel A is mainly caused by several epochs with high error, as evident from only a minor reduction of percent epochs with error < 7 BPM.
