印片颗粒指数的测试点应根据彩色负片的感光特性确定，为正常扩印时对应正片0 .74中灰密度的负片密度点。
The film measuring point of print grain index should be made according to its light-sensitive characteristics, being the density corresponding to the 0.74 gray density of color paper when printing;
能对获得的视频信号进行冻结、存储、再现、放大、空间旋转、负片等处理，能测量两点间距离、夹角、曲率半径、点密度。
It can freeze, store, display, magnify and rotate the video signals. It can measure the distance between two points, the angles, the radius of curvature and the point density.
能对获得的视频信号进行冻结、存储、再现、放大、空间旋转、负片等处理，能测量两点间距离、夹角、曲率半径、点密度。
It can freeze, store, display, magnify and rotate the video signals. It can measure the distance between two points, the angles, the radius of curvature and the point density.
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