中文说明：实现24位RGB彩色图像，先转化为灰度图像，而后用大津法实现二值化，并显示阀值。
English Description：
The 24 bit RGB color image is transformed into gray image, and then binarized by Otsu method, and the threshold value is displayed.
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中文说明：实现24位RGB彩色图像，先转化为灰度图像，而后用大津法实现二值化，并显示阀值。
English Description：
The 24 bit RGB color image is transformed into gray image, and then binarized by Otsu method, and the threshold value is displayed.