Algorithms Available on the Web

Zernike Polynomials to Point Spread Function:
Patrick Maeda's Matlab code WaveAberrationPSF.m made more flexible along with a much faster version of his zernike.m.

Text readability index:
Matlab code example computing index for a single letter image

Symbol discriminability metric:
Matlab code example computing discriminability for two symbol images compensating for size and position.

Luminance image discrimination and detection models:

Local visible contrast metric.

Single filter model with masking for non-homogeneous backgrounds.

Single filter model without masking for non-homogeneous backgrounds.

Single filter model with masking for homogeneous backgrounds.

Visible-energy version of model for homogenenous backgrounds. (see 2004 ARVO talk) Matlab version , R version (download free R interpreter or use a free R interpreter on the web)

Spatial-temporal luminance sequence discrimination model:
Dual channel (magno/parvo) linear models (no masking)
Undocumented Mathematica code fragments

Spatial-temporal luminance sequence discrimination model:
Dual channel (magno/parvo) masking models (1 spatial dimension)
Undocumented Mathematica code fragments