Procedure of acquisition of several images of the same packaging with the help of a single linear camera

摘要

Process of inspection of packages (1) of products with the help of a linear image sensor (2), which successively supplies lines of images, each package being inspected in movement with respect to said sensor and being illuminated with the aid of at least one lighting system (3), the method being characterized in that: - a sequence of n successive image lines (I1, I2, ... In) is cyclically acquired for each increment of movement; (n being greater than 1), so that we obtain j for increments of movements, sequences (S1, S2, ... Sj), obtaining the n lines of images of each sequence with different exposure times (Ti) and / or different lighting conditions (Ek), - the image lines (I1, I2, ... In) obtained in the sequences which exhibit both the same exposure time (Ti) and the same lighting conditions (Ek) de maner to obtain n superimposable images (I1, I2, ... In) of at least j image lines, obtaining images with different exposure times (Ti) and / or in different lighting conditions (Ek) , - the n images (I1, I2, ... In) are analyzed separately or in combination in order to determine at least one characteristic of the package (s) inspected.