Writing 3 fomulas for matrices for image comparison (RMSE)

Hi

I am trying to write the code for 3 formulas on matlab. They are being used to find to find the root mean square error . They will be applied on 2 matrices and 1 of them in complex. Essentially i am trying to compare a target image with a reconstructed image that differs from the target image.

I am getting a bit confused on what i am supposed to get from each formula (is it a single number, a matrix, etc.. , is it complex or real)

f= is the target image , g= the reconstructed image, g*= the conjugate of g , e= rmse , erms= the normalised rmse

Is it possible for someone to explain me how should the code be written?

Thank you

Answer 1

[Image Analyst]

Why not use immse()?