Abstract: A computer implemented method for distinguishing between animals depicted in one or more images, based upon one or more taxonomic groups. The method comprises receiving image data comprising a plurality of parts, each part depicting a respective animal, determining one or more spectral properties of at least some pixels of each of the plurality of parts, and allocating each of the plurality parts to one of a plurality of sets based on the determined spectral properties, such that animals depicted in parts allocated to one set belong to a different taxonomic group than animals depicted in parts allocated to a different set.

Abstract: A computer-controlled life support system and method for mixed-gas diving, having separate supplies of oxygen and diluent gas or gases is provided. Multiple processor units provide redundant gas control and dive data recording. The primary processor automatically controls the oxygen make-up based on partial pressure of oxygen according previously determined dive parameter. A secondary CPU provides back up gas control information and displays system and dive parameters including decompression schedules. A tertiary CPU, independently powered and provided with duplicate sensors, provides an additional backup means for gas control and decompression calculations. No automatic gas control is available from the third CPU, but displayed data allows manual gas control.