针对图像区域复制—粘贴篡改，提出了一种基于灰度共生矩阵的检测算法。

With regard to the copy-move forgery of image region, this paper proposes a detection algorithm based on gray level co-occurrence matrix.

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在建筑物候选区域的寻找阶段，本文主要采用了一种基于灰度共生矩阵的方法对图像进行分割，从分割结果中得到建筑物的候选区域。

In the candidate building area searching step, an image segmentation method based on grey level co-occurrence matrix (GLCM) is adopted to get candidate building areas in an urban image.

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提出了一种基于灰度-梯度共生矩阵模型和最大熵原理的自动阈值化方法。

In this paper, an automatic approach for thresholding based on gray level gradient co occurrence matrix model and the maximum entropy principles is proposed.

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