The invention relates to a method for assisting with the search for an element (E) having a pre-defined hue in an environment, the method comprising the supply of at least one colour image, the or each image comprising pixels, said method being characterised in that it comprises the selection, in the or each image, of the pixels having a hue of which the bijection-associated value of the parameter is comprised between a first and a second value, the first and second values being selected so that the group of hues of which the bijection-associated value of the parameter is comprised between the two selected values comprises the pre-defined hue.