Methods function risk in package aws. For an given array u
the following statistics are computed :
Root Mean Squared Error RMSE <- sqrt(mean((y-u)^2)),
Signal to Noise Ratio SNR <- 10*log(mean(u^2)/MSE,10),
Peak Signal to Noise Ratio PSNR <- 10*log(max(u^2)/MSE,10),
Mean Absolute Error MAE <- mean(abs(y-u)),
Maximal Absolute Error MaxAE <- max(abs(y-u)),
Universal Image Quality Index (UIQI) (Wang and Bovik (2002)).
# S4 method for array
risk(y, u=0)
# S4 method for aws
risk(y, u=0)
# S4 method for awssegment
risk(y, u=0)
# S4 method for ICIsmooth
risk(y, u=0)
# S4 method for kernsm
risk(y, u=0)
# S4 method for numeric
risk(y, u=0)object
array of dimension dim(y) or dim(extract(y,what="yhat")$y)
or scalar value used in comparisons.
signature(y = "ANY")The method extract and/or compute specified statistics from object of class
signature(y = "array")Returns a list with components RMSE, SNR, PSNR, MAE, MaxAE, UIQI
signature(y = "aws")Returns a list with components RMSE, SNR, PSNR, MAE, MaxAE, UIQI
signature(y = "awssegment")Returns a list with components RMSE, SNR, PSNR, MAE, MaxAE, UIQI
signature(y = "ICIsmooth")Returns a list with components RMSE, SNR, PSNR, MAE, MaxAE, UIQI
signature(y = "kernsm")Returns a list with components RMSE, SNR, PSNR, MAE, MaxAE, UIQI
signature(y = "numeric")Returns a list with components RMSE, SNR, PSNR, MAE, MaxAE, UIQI
Joerg Polzehl polzehl@wias-berlin.de
V. Katkovnik, K. Egiazarian and J. Astola, Local Approximation Techniques in Signal And Image Processing, SPIE Society of Photo-Optical Instrumentation Engin., 2006, PM157
Z. Wang and A. C. Bovik, A universal image quality index, IEEE Signal Processing Letters, vol. 9, N3, pp. 81-84, 2002.