Image recognition techniques currently used cannot effectively detect similar foreign materials for their same appearance as the background.

相似异物作为一种与背景特征相似的被检测对象，使目前的图像识别技术遇到新的挑战。

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Image detection techniques currently face a new challenge that it is difficult to acquire image features of similar foreign materials for their same appearance as the background.

由于相似异物与所处背景的外观特征极其相似，常规的红外光谱成像方法无法获取相似异物的图像特征，使目前红外图像检测技术遇到新的挑战。

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