Take out the grayValue of the picture, make the maximum and minimum order, convert it to the height of Z, so it is convenient to take out the picture corresponding to the Z value of ROI

Filename	Size	Update
first.hdev	964	2018-01-02
replay Tue Jan 02 2018 10_01_30 GMT+0800正面极弯1.csv	7996047	2018-01-02
replay Tue Jan 02 2018 10_01_30 GMT+0800正面极弯1.csv金属面拉-16.9148-12.8123.png	1350469	2018-01-02

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