Question

用OpenCV中的imread读取图像，图是彩色图，而为什么dims是2呢？！

就这个图，然后我插入了一个断点，进行DEBUG下监视，看image的属性，发现dims的值为2是什么情况啊？

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Answer 1

参数不对。
imread(const string& filename, int flags=1 )

filename – Name of file to be loaded.
flags –
Flags specifying the color type of a loaded image:

In the current implementation the alpha channel, if any, is stripped from the output image. Use negative value if you need the alpha channel.
CV_LOAD_IMAGE_ANYDEPTH - If set, return 16-bit/32-bit image when the input has the corresponding depth, otherwise convert it to 8-bit.
CV_LOAD_IMAGE_COLOR - If set, always convert image to the color one
CV_LOAD_IMAGE_GRAYSCALE - If set, always convert image to the grayscale one
Note：
>0 Return a 3-channel color image.
=0 Return a grayscale image.
<0 Return the loaded image as is (with alpha channel).

Answer 2

因为dims是矩阵维度啊