Return an estimate of the optical MTF or PSF or LSF of the human eye
[MTF, PSF, LSF] = Ijspeert(age, p, m, q, phi)
The formula is a function of various parameters.
Parameters:
age - age of person in years
p - pupil diameter in mm
m - pigmentation parameter:
m=0.142 for Caucasian population mean
m=0.16 for mean blue Caucasian eye
m=0.106 for mean brown Caucasian eye
m=0.056 for mean pigmented-skin dark-brown eye
q - spatial frequencies in cycles per degree to compute MTF on
phi - angles in radians to compute PSF and LSF on
Reference:
Ijspeert et al, Vision Res. 1993 Jan;33(1):15-20. An improved
mathematical description of the foveal visual point spread function with
parameters for age, pupil size and pigmentation.
See corrections in Drasdo N, Thompson CM, Charman WN. Inconsistencies in
models of the human ocular modulation transfer function. Vision Res.
1994 May;34(10):1247-53.
Examples:
[MTF] = ijspeert(age = 30, pupilDiameter (mm) = 3, m=.142, q=[0:60]) % computes only the MTF
[MTF, PSF] = ijspeert(age, p, m, q, phi) % computes MTF and PSF
Copyright ImagEval Consultants, LLC, 2005.