Patent ID: 8442342

Claim:
A method performed on at least one processor for producing a focused image from a misfocused image is created by a misfocused lens or lens-system, the method comprising: receiving image data; generating a two-dimensional discrete fractional Fourier transform operation comprising a fractional power parameter having a first numerical value; generating a two-dimensional discrete fractional Fourier transform phase operation comprising a fractional power parameter having a second numerical value; generating partially-focused phase-adjusted image data, the partial-focus resulting from the application of the two-dimensional discrete fractional Fourier transform operation, the partially-focused phase-adjusted image data generated by applying the two-dimensional discrete fractional Fourier transform operation to the image data to create partially-focused image data, and applying the two-dimensional discrete fractional Fourier transform phase operation to the partially-focused image data to create partially-focused phase-adjusted image data; and presenting the partially-focused phase-adjusted image data to an exogenous misfocused optical system to create a resulting combined-processed image, wherein the numerical value is determined by adjusting the fractional Fourier transform power to maximize the sharp edge content of the resulting combined-processed image.