Automated length measurement using U-shaped fully convolutional networks and second-order anisotropic Gaussian kernels.

•Length measurement is a fundamental task in Artemia studies.•Automated Artemia length measurement suffers from the distortion of objects.•An automated length measurement method is proposed.•The U-Net extracts the length measuring structure, while the kernels do a thinning.•The proposed method can accurately measure the length of Artemia in images.