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.
Department of Electrical Engineering, Washington University, St. Louis, Missouri 63130.
D L
DL
Snyder
A M
AM
Hammoud
R L
RL
White
D000465:Algorithms; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008433:Mathematics; D010781:Photography / Q000295:instrumentation*