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我正在尝试将矩阵传递给 dct2 函数，但它显示错误。我正在使用 matlab 版本 R2012a。我有一个矩阵 B，它只是用作如下参数

B = dct2(A);

disp(B);

错误是这样显示的

Undefined function 'dct2' for input arguments of type 'uint8'.

Error in image_dct (line 24)
B = dct2(A);
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You have to have the image processing toolkit in order to use that. Assuming you have that, then it should be just as simple as you listed.

于 2012-11-27T21:41:14.517 回答