Determination of Firebrand Characteristics Using Thermal Videos

The distances between the particles, the sizes, and the temperatures of the particles were used as metrics for comparing the particles within the frames. [...] Fire 2020, 3, 68 4 of 17 The MOTP metric is used to evaluate the posit∑ioning accuracy of tracked particles and can becalculated by the formula ∑ dti,tMOTP = i (7) t ct where dti is the distance between the ground truth, that is, annotated particles and the particles predicted by the code with the number I in the frame; ct is the number of matches found in the frame with the number t. [...] The MOTA metric is based on the frequency of false positives, the frequency of missed detections, and the frequency of errors in assigning a detec∑tion number: t(mt +∑f pMOTA 1 t + mmet)= − (8) t gt where mt is the number of missed detections, f pt is the number of false positives, mmet is the number of mismatches; gt is the number of objects in the frame t. [...] The set of images was then analyzed using a detector and the errors in the geometric dimensions of the object were calculated, dependent on the distance from the focal length. [...] The founding sponsors had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish the results.