An automatic method to calculate heart rate from zebrafish larval cardiac videos

BMC Bioinformatics

Table 1 Evaluation indices

Index	Abbreviation	Equation^a
Mean absolute error	MAE	\( \frac{1}{n}\sum \left\|{e}_i-{a}_i\right\| \)
Root-mean-square error	RMSE	\( {\left(\frac{1}{n}\sum {\left\|{e}_i-{a}_i\right\|}^2\right)}^{1/2} \)
Relative MAE	rMAE	\( \frac{1}{n}\bullet \sum \left\|\frac{e_i-{a}_i}{a_i}\right\| \)
Relative RMSE	rRMSE	\( {\left(\frac{1}{n}\sum {\left\|\frac{e_i-{a}_i}{a_i}\right\|}^2\right)}^{1/2} \)

^aThe definition of the abbreviations used: n is the number of samples, e_i is the estimation for the i-th sample, and a_i is the answer of the i-th sample. For heartbeat detection, e_i and a_i are the number of heartbeats of the i-th video. For heart rate estimation, e_i and a_i are the heart rates of the i-th video

ISSN: 1471-2105