Sharper Image: Implementing a Fast Fourier Transform (FFT) to Enhance a Video-Captured Image.

摘要

The lack of visual information and cues in night vision images has produced a history of in-flight mishaps where night vision devices (NVDS) were used as the primary source of sight. In an effort to produce improved night vision images and thereby reduce in-flight mishaps, a video enhancement technique, the sharper image, was developed to enhance, filter, and study images generated by NVDS. The sharper image technique enhances night vision images by filtering or amplifying the spatial frequencies that are distorted by NVDS. In this report, we describe the necessary methodology and procedures to enhance, filter, or process any visual image. We also discuss other computational image software and review the advantages and disadvantages of each. Image enhancement, Filtering, FFT, Discrete fourier transfer, Spatial frequency component, Night vision, Image capture.