电子转发女学光电科学与工程学院 SCHOOL OF OPTOELECTRONIC SCIENCE AND ENGINEERING OF UESTC Degradation Restoration Estimation True value Uniqueness Degradation (forward) Measured Acquisition system(Model) True yalue value Restoration (inversion) MultiplicityDegradation (forward) Restoration (inversion) Uniqueness Multiplicity Estimation True value Degradation & Restoration ≈ True value Measured value Acquisition system (Model)