Detecting impurities

A method performed by one or more devices, the method comprising the steps of:

• detecting a first image information item indicative of at least one soiling on a textile;
• determining a soiling information item indicative of at least one property of the soiling on the textile, wherein the at least one property is determined based on the detected first image information item, and wherein the at least one property of the soiling of the textile is determined based on a property dependent on an outline of the soiling;
• outputting or causing the outputting of the determined soiling information item;
• and
• determining at least one cleaning strategy parameter of the textile based on the determined soiling information item,
• wherein the at least one cleaning strategy parameter is determined by a neural network, wherein in a first step, a classification of the soiling is done based on the determined soiling information item or based on the determined soiling information item and the determined property information item of the textile, and in a second step, the cleaning strategy parameter is derived based on the classification of the soiling.