Do you need to convert DCT frequency domain information back to RGB?

[cwwng]

Hello, convert the RGB information to the DCT frequency domain information and enter the model. After learning the frequency domain information in the model, don't you need to convert the frequency domain information back to RGB?

Looking forward to your reply.

[kaix90]

You don't need to convert from the frequency domain back to RGB because the extracted features can be directly used for making decisions. Thanks.