缺陷部分 meaning in English

defective portion

Bruising on the surface is a common defect of apple , in the saturation image of his color model , gray value of defect varies from the normal part , defective part can be segmented out when 90 is choosed as threshold
表面碰压伤是苹果常见的一种缺陷，在his颜色空间的饱和度图像中，缺陷部分和正常部分表现出较大的灰度差异，可以用90作为阈值进行二值分割。
The research content is detect of log internal defect ( such as knobs , internal decay , hollow , etc . ) and shape by using x - ray to penetrate the log . the absorb of x - ray between log internal defect and log internal xylem is different . so the x - ray photograph is different . if we can get the several side x - ray photograph of log . and input the photograph into computer to digital image process
由于原木木质部分与内部缺陷部分对x射线的吸收能力不同，在x射线底片上形成的影像也不一样，如果对检测原木从不同的方向进行照射，再把得到的射线底片输入至计算机内部进行处理，就可以得到原木内部的大致空间结构参数，对原木的加工有重要的辅助作用。