1. A method for monitoring the process of cutting up and deboning slaughtered animal bodies in cutting plants, within which the slaughtered animal body is divided up in steps for extracting the bones from the large animal pieces that arise; segments with bones contained therein are detached from the large animal pieces, and the detached segments composed of bones with meat remaining thereon are transported off via one or more conveyor belts, wherein the cutting-up process is monitored with respect to leaving the smallest fraction possible of meat behind on the bones extracted during cutting, is hereby characterized in that the monitoring is executed automatically by a) recording images of detached segments containing bones on at least one conveyor belt, b) differentiating bone, fat and meat of the imaged segments based on their different color by an image-processing software program, and determining a meat fraction of the detached segments, that is a fraction of meat remaining on the bone or bones in the detaching of the segments as a quotient between a geometric quantity of the portions identified as meat for one or more segments and a same type geometric quantity determined overall for said segment or segments, c) directly visualizing data as determined according to b) on means for directly visualizing data or/and further processing data as determined according to b) for output of messages derived therefrom, or for creation of reports to be output later.