编写一个能计算一张图像直方图的程序。

Write a computer program for computing the histogram of an image.

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图像直方图的分布与拍摄天气和时间有关。

The histogram of image depends on the weather and time.

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研究了基于缺陷图像直方图、纹理、投影和形状的特征提取。

Feature extraction based on the histogram, texture, projection and shape of the defect images was also investigated.

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