Resolution Enhancement Using Alias Filtering.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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The purpose of the research accomplished was to determine if the bandpass filtering of digitized image data could improve the resolution of an image beyond that of an unfiltered image. The bandpass filters removed the aliased frequency components from the image spectrum and translated them to positions which they would occupy if the image had originally been sampled by the digitizer at a higher rate. The results of the filtering showed that the removal and relocation of aliased frequency components with the filters designed during this research produced more image distortion than was created by the aliased frequency components. It was discovered, however, that significant increases in resolution could be obtained by using an interpolation procedure.