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During the warping process, hundreds of yarns are typically wound at speeds exceeding 100 meters per second, making it impossible for the human eye to detect surface stains. With the advancement of machine vision technology, this solution has become the optimal approach for detecting surface stains during warping. This system can monitor stains on each yarn in real time, promptly issuing alarms or stopping the machine upon detection, and storing stain images on a per-yarn basis, thus preserving the records.