求翻译：其中灰度均方差作为零值绝缘子红外热像经验特征参数被剔除，是因为图像预处理后的矩形区域保留了少量背景，使得该特征不能成为对分类显著影响的主要因素，取而代之的是描述图像边缘信息的梯度均方差。是什么意思？

Which the gray level mean square value of zero insulator infrared thermal characteristic parameters like experience were excluded, because the rectangular area in the image pre-processing to retain a small amount of background, making the feature can not be a major factor in a significant impact on

The Gray is the variance as a value of zero insulation the infrared thermal imaging parameters were removed from experience, that is that the image pre-processing of the rectangular region has retained a small background, makes the character could not be the classification of the major factors signi

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Which mean-square deviation of gray, as a value of zero characteristic parameters of infrared thermal imaging experience of insulators were excluded, is because the rectangular area of the image after preprocessing has retained a small amount of background, making classification significantly affect

Gradation mean-square deviation infrared hot experiences the characteristic parameter as the zero value insulator to reject likely, after is because the image pretreatment rectangular region retained the few backgrounds, enables this characteristic to become to classifies the remarkable influence th