Abstract: The present invention provides a method for composing a robust reference image or reference image with permissible deviation values of the exterior of a series of practically identical containers, such as bottles, crates and the like, comprising steps for: a) making an image recording of a part of the exterior of a plurality of containers from the series; b) processing the recorded image in order to obtain a first representation; c) composing a complete peripheral view of the exterior of the container on the basis of the first representations; d) determining, on the basis of all recorded images and parameters to be preset, the robust reference image of the container on the basis of which acceptable differences can be taken into account during selection of containers.

Abstract: The present invention provides a device and a method for performing measurements on packagings, in particular packagings which are at least slightly worn on otherwise to a greater or lesser extent opaque to visible light, which are filled with a liquid product, wherein the packagings are irradiated with radiation in a wavelength range suitable for the packaging with product, and images of at least a part of the content of the packaging are recorded for a predetermined time by image recording means, wherein the obtained image information is analysed for information indicating the presence of undesired particles, and a part of the radiation has a frequency falling within the infrared range.