System using ergodic ensemble for image restoration
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United States of America Patent
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Jun 24, 1997
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N/A
app pub date -
Dec 8, 1994
filing date -
Dec 8, 1994
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Abstract
Established text characteristics help generate a random ergodic ensemble of characters constituting a random text image. The image is scaled in accordance with different optical parameters such as lens position, focal length, and change in focal length. The test image is printed or displayed so that a Fourier Transform of the image can be taken and recorded. The recorded image is printed and constitutes an inverse filter. The inverse filter is positioned in an inverse Fourier Transform. An actual image (blurred text) undergoes a Fourier Transform and is then filtered by the inverse filter positioned at the inverse Fourier plane. The resulting filtered image then undergoes an inverse Fourier Transform so as to restore or at least greatly enhance the blurred image.
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