In the paper, added the gradient information into the image gradation histogram, proposed the gradation-gradient two-dimensional histogram.
通过对图像的灰度直方图中加入它的梯度信息，提出了灰度-梯度的二维直方图。
In the paper, added the gradient information into the image gradation histogram, proposed the gradation-gradient two-dimensional histogram.
通过对图像的灰度直方图中加入它的梯度信息，提出了灰度-梯度的二维直方图。
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