基于主动热成像技术的苹果早期机械损伤检测

Detection of Early Mechanical Damage in Apple Based on Active Thermal Imaging

针对苹果早期机械损伤在普通光学图像中特征不明显,易受表皮颜色、果梗和花萼干扰,很难检测识别的特点,选取红富士苹果作为研究对象,通过主动红外热激励以及降温措施,利用红外热成像技术研究苹果表面机械损伤温度变化情况。结果表明:苹果表面早期机械损伤在热图像中的对比度受周围空气流动影响,苹果的缺陷部位与果梗、花萼的线轮廓温度曲线的波形特征存在明显差异,可以较好地排除苹果果梗和花萼的干扰,达到缺陷检测的目的。

Early physical damage of apple has no obvious characteristics,and will be easy confused by stem,calyx and color of fruit when to be detection.To detect this bruise,Fuji apple was selected and active infrared thermography technique was chose through active infrared thermal excitation and cooling measures.The results indicate that the apple thermal image of early physical damage is influenced by the surrounding air flow,the waveform feature of temperature curves of defect,stem and calyx is also different obviously.The tests proved that this method for detecting early physical damage of Fuji apple is efficient.