Child Poor Posture (Hunchback / Head Tilt) Real-Time Reminder | 儿童坐姿不良（驼背/歪头）实时提醒

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Using the camera built into a smart desk lamp or mounted above the desk, the system analyzes the child's sitting-posture video in real time, detecting spinal curvature angle (estimated Cobb angle) and head tilt angle. | 通过智能台灯内置摄像头或书桌上方摄像头，实时分析儿童学习时的坐姿视频，检测脊柱弯曲角度（Cobb角估算）以及头部倾斜度（侧倾角）。当驼背（Cobb角>10°）或歪头（头部侧倾角>15°）持续时间超过预设阈值（如5秒）时，触发语音提醒（如'请坐直'、'头抬正'），帮助儿童养成良好坐姿习惯，预防近视和脊柱侧弯。