公开(公告)号：EP4202424A1

公开(公告)日：2023-06-28

申请号：EP21383178.7

申请日：2021-12-21

申请人： Fundacion Centro de Tecnologias de Interaccion Visual y Communicaciones VICOMTECH ,  IKOR Technology Centre S.L.

发明人： Barandiaran Martirena, Iñigo ,  Segura Lasa, Álvaro ,  Saiz Álvaro, Fátima ,  Etxaniz Sein, Unai ,  De la Cruz de la Cruz, Mikel ,  Aguinaga Azpiazu, Daniel

IPC分类号： G01N21/88 ,  G01N21/956 ,  G06T7/586

摘要： A computer-implemented method for inspection of welds in a printed circuit board, comprising: With an optical system (10) comprising a camera (15) and an illuminator (11) disposed in the vicinity of a weld to be inspected: switching on (803) a first quadrant of the illuminator (11) while the three other quadrants of the illuminator (11) are switched off, and taking a first image of the weld; switching off the first quadrant of the illuminator (11) and switching on a second quadrant thereof, and taking a second image of the weld; switching off the second quadrant of the illuminator (11) and switching on a third quadrant thereof, and taking a third image of the weld; switching off the third quadrant of the illuminator (11) and switching on a fourth quadrant thereof, and taking a fourth image of the weld; Digitally applying a photometric stereo reconstruction technique to the four images of the weld for obtaining (903) a 5-dimensional image of the weld; Delivering the 5-dimensional image of the weld to a model for detection of anomalies and assessing by the model whether the weld is defective or not. A system for inspection of welds in a printed circuit board, comprising: an optical system (10) comprising a camera (15) and an illuminator (11), the optical system (10) being configured to be disposed in the vicinity of a weld to be inspected and to capture images of the weld; and processing means configured for digitally applying a photometric stereo reconstruction technique to the captured images of the weld and for assessing, based on the images, by a model for detection of anomalies, whether the weld is defective or not.