I am interested to know Energy of low and high frequency component of dct (discrete cosine transform) of image.
Here, i found [energy computation of signal](https://en.wikipedia.org/wiki/Energy_(signal_processing))
I cannot find energy computation of low and frequency component of dct from image.
so i used the energy computation of signal as shown formula below.
> Energy = Sum (Amplitude * Amplitude )
Below are the original, dct image and its energy computed from above formula.
**Original Image**
**dct of above image.**
Then, i am using upper quadrant of image as low frequency and bottom corner quadrant of image is high frequency compoent.
**And their energy is as follows:
21.391 , 11.2572**
My question is how to exactly find energy of frequency from DFT or DCT?
Or Same formula of energy computation is used for image and signal processing?
Kindly, help me to understand.
Thanks
↧
