Linearity and Dynamic Range of a Photographic Film Data Processing System.
MICHIGAN UNIV ANN ARBOR INST OF SCIENCE AND TECHNOLOGY
Pagination or Media Count:
Photographic film is non-linear. Yet, for coherent optical processing it is used for recording signals and processed as if it were linear. In the system to be discussed film is recorded from a cathode-ray tube, where the signal input is represented through Z-axis modulation. This modulation is non-linear with respect to a voltage input. Our task is to find the linearity and dynamic range of signals on photographic film recorded from a cathode-ray tube. Since the photographic film is to be processed linearly, that is, through taking the Fourier transform, the film ideally should linearly correspond to the recorded signal. One desires a linear transformation but finds two non-linear transformations.