The intent of this research was to model sensor degradation effects using an image chain applied to a synthetic radiance image. The model is relatively basic so that many types of sensors can be modeled. The sensor effects were applied in the frequency domain by cascading modulation transfer functions (MTF) and phase transfer functions (PTF) from the different stages of the image chain. The stages consist of the optical transfer function due to the aperture effects of the optical system. Noise due to photon arrival, the signal loss due to the transmission of the optics, the MTF due to the detector size, the MTF and PTF due to the Charge Transfer Efficiency (CTE) of the detector/electronics, and the noise associated with the electrical system. Each component is a spatial averager where the input radiance field is smoothed as it travels through each component in the chain. The system is intended to make the synthetic image look real while still preserving the radiometry of the scene. The components were modeled through functions written in the interactive data language (IDL). Results of the component modules show that indeed each component acts as a spatial averager in the system.
Bleeze, Brian, "Modeling the MTF and noise characteristics of complex image formation systems" (1998). Thesis. Rochester Institute of Technology. Accessed from
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