Image recovery from data acquired with a charge-coupled-device camera.
A model for data acquired with the use of a charge-coupled-device camera is given and is then used for developing a new iterative method for restoring intensities of objects observed with such a camera. The model includes the effects of point spread, photoconversion noise, readout noise, nonuniform flat-field response, nonuniform spectral response, and extraneous charge carriers resulting from bias, dark current, and both internal and external background radiation. An iterative algorithm is identified that produces a sequence of estimates converging toward a constrained maximum-likelihood estimate of the intensity distribution of an imaged object. An example is given for restoring images from data acquired with the use of the Hubble Space Telescope.
Snyder
D L
DL
Department of Electrical Engineering, Washington University, St. Louis, Missouri 63130.
Hammoud
A M
AM
White
R L
RL
D000465:Algorithms; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008433:Mathematics; D010781:Photography / Q000295:instrumentation*