如何将JPEG转换为DCT 8X8块? [英] How I can convert JPEG into DCT 8X8 block?

问题描述

如何将JPEG转换为DCT 8X8块?在C ++中

How I can convert JPEG into DCT 8X8 block? in C++

推荐答案

如果您想将DCT应用于JPEG(或任何)图像，则需要访问其像素数据.为此，可以在不影响其内部结构的情况下使用网络上的一些开放源代码库. http://www.openjpeg.org [ ^ ]

BTW，AFAIK，JPEG图像本身可能已经被DCT处理，即JPEG使用DCT进行有损压缩.

If you would like to apply DCT to a JPEG (or any) image, you need to access its pixel data. To do this without struggling its inner structure, you can use some of the open source libraries on the net. http://www.openjpeg.org[^]

BTW, AFAIK, a JPEG image itself possibly has been DCTed already, that is, JPEG uses DCT for its lossy compression.

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