For the PS plate grain and light-sensitive coating abrasion, an experiment was designed based on factor design, which ensures the veracity of experiments.

针对印刷中砂目和感光层的磨损，采用因子设计法设计实验，保证了实验的准确性。

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Treat with plate grain image got by video using methods of gray level transformation, median filter, erosion, expansion and so on, gain the image which only includes grain, then detect brim of grain.

对视频采集到的板材纹理图像进行灰度化、中值滤波去噪、二值化、腐蚀、膨胀等处理，得到仅包含目标纹理的图像后检测纹理边缘。

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Chemical graining: the lithographic plate surface is etched to produce a fine grain by the application of a strong acid or alkali solution.

化学磨版：用强酸或强碱溶液在平版印版的版面上腐蚀，造成幼细微粒表面。

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Instead of complex food groups, the plate is split into an easy four: fruits, vegetables, proteins and grain.

FORBES: U.S.D.A. Topples Food Pyramid With A Very Expensive Plate