Computer-assisted video surveillance of heat

\ Computer-assisted video surveillance of heat Four fixed digital cameras were installed above two areas straw-covered areas for a herd of 70 dairy cows in Haute-Savoy. The images were edited using software that detected movement and that selected images. Three methods were tested: fixed 30-minute daily periods, icons (first images of 10 minute sequences) or continuous (experimental mode). Out of the 71 ovulatory phases found on the progesterone profiles during the 103 days Or the study, 44 accepted mountings were detected by the three methods. The computer detected thirteen ovulatory phases that were not directly observed by the farmer. Thirteen to 20.5 times more mountings than with the direct method by the farmer were visualised in the time given and the sensitivity calculated varied from 76 to 91.5%. The system presents certain intrinsic limitations but also a margin for improvement.