A computer-implemented method (600) for providing an audit record (500) that relates to activities (210, 220) performed by human operators (201) within a facility (100) in interaction with technical equipment (300), wherein the audit record (500) indicates performance of an activity sequence (210, 220) with a first activity (210) and with a subsequent second activity (220) by either the same human operator (201A) or by different human operators (201A, 201Z), the method (600) comprising:
- receiving (610) a series (700) of images (701, 702) that visualize activities (210, 220) by human operators (201), the series (700) with at least a first image (701) of a first activity (210) in interaction with first technical equipment (301A), and a second image (702) of a second activity (220) in interaction with second technical equipment (301B, 301C);
- by applying image-processing to the first image (701) and to the second image (702), separating (620), within the first image (701) and within the second image (702), at least first (701x, 702x) and second (701y, 702y) areas, wherein the first areas (701x, 702x) comprise biometric image data indicative of a particular human operator (201A) within the set of human operators (201) belonging to the manufacturing facility (100), and wherein the second areas (701y, 702y) comprise image data indicating the interaction with the technical equipment (301A, 301B, 301C);
- by applying image-processing to the first area (701x) of the first image (701) and to the first area (702x) of the second image (702), obtaining (630) identifiers (ALPHA, BETA) of human operators (201) among the multiple human operators, the identifiers (ALPHA, BETA) thereby indicating performance of the first activity and of the second activity by particular human operators (ALPHA, BETA);
- by applying image-processing to the first area (701x) of the first image (701) and to the first area (702x) of the second image (702), removing (640) biometric image data indicative of particular human operators (ALPHA) from the first area (701x) of the first image (701) and from the first area (702x) of the second image (702), so that the first area (701x) of the first image (701) is modified to a modified first area (701xx) of the first image (701) and the first area (702x) of the second image (702) is modified to a modified first area (702xx) of the second image (702);
- combining (650) the modified first area (701xx) of the first image (700) with the second area (701y) of the first image (701) to a modified first image (701′), and combining the modified first area (702xx) of the second image (702) with the second area (702y) of the second image (702) to a modified second image (702′);
- and
- providing (660) the audit record (500) by storing the modified first image (701′), the modified second image (702′) with the respective identifiers (ALPHA, BETA).