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:  2026
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(.):  animal pose estimation, noise robustness, pose estimation, computer vision, Gaussian noise
:   YOLOv8 . , . 34- , , 19 . . . . 3, , . .
(.):  This paper presents a qualitative and quantitative robustness analysis of the YOLOv8 model under additive Gaussian noise on a dataset of cattle images for animal pose estimation. The choice of this noise type is justified by a structural analysis of inter-ference components in modern semiconductor photosensors, which demonstrates the dominant character of the selected noise. Euclidean deviations and the number of missed keypoints were measured across 34 noise levels. The estimation error was decomposed into systematic and random components, and the robustness of 19 ana-tomical keypoints was analyzed, revealing distinct clusters with different stability patterns. The clusters correspond to anatomically and functionally related groups of keypoints with comparable sensitivity to noise intensity. Quantitative thresholds were established for the transitions from a robust pose estimation regime to pro-gressive degradation and then to systematic failure. The statistical significance of these transitions was confirmed using Tukey's test. Training on noisy data improved model accuracy by approximately a factor of three at a critical noise level, shifting the failure threshold toward significantly higher noise intensities. These findings provide deeper insight into error mechanisms and outline practical directions for enhancing the reliability and operational robustness of pose estimation systems in industrial environments.

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