EOP513 Fourier Optics Assignment 10
- Download your class image, convert it to grayscale
(see lenna and
the example referenced there to see how to convert to grayscale),
embed it into a 256 x 256 (or 512 x
512) array, and find its Fourier Transform. You should take the square
root of the input before transforming so that an eventual inverse
transform will restore the original irradiance.
- Mask your image so that it has circular (or elliptical) borders
instead of square borders. Zero fill the exterior. Find its Fourier
Transform and compare with the results of the previous exercise.
- Use your class image to show examples of lowpass, highpass,
and bandpass operations. See (
Filtering in the Frequency Domain)
- Use one of your classmate's images and interchange the
magnitude of the Fourier transform of one image with the phase of the other. You should see
that the resulting inverse transform follows the phase information.
- Convert your class image to grayscale and then to a phase image. Process the phase image to recover
the underlying image. Compare different
forms of phase contrast filtering. (See examples)
Maintained by John
Loomis, last updated 25 July 2012