以下为句子列表：
英文: A method independent of the orientation information is presented based on gray level similarity of a local area and its sub-samplings, computing the minimum size of the sampling with the grey level similarity, and eventually, the ridge frequency related t
中文: 摘要提出了一种独立于纹线方向信息的方法，根据指纹整体与局部在灰度的相似性，求出具有该相似性的最小局部的尺寸，从而得到相应的纹线密度。
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英文: Co-occurrence matrixes identify repeated occurrences of gray level pixel configurations within the texture.
中文: 共生矩阵确定纹理的灰度级象素组态。
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英文: 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.
中文: 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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