FishScale

FishScale estimates fish lengths, numeric abundance, and biomass density in underwater still images. This software package is further described in a journal article by Esselman et al. (in revision; Methods in Ecology and Evolution) entitled "A transferable approach for quantifying benthic fish sizes and densities in annotated underwater images". FishScale uses binary masks obtained from semantic segmentation of individual fish in images to provide accurate estimates of fish lengths, numeric abundance, numeric density, biomass, and biomass density after first correcting for lens distortion, biases caused by underwater magnification, distance from the camera to fish targets, and variation in fish curvature. Users must provide size calibration images and fish length-to-weight relationship(s) to fully utilize the software’s capability.