| Question | Comments | Original | Result |
|---|---|---|---|
| 1a. Remove high frequencies from an image using fft2 and ifft2 |  This method works because convolution in the spatial domain is element-wise multiplication in the frequency domain by the covolution theorem. |
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1a. Remove high frequencies from an image using fspecial to get a gaussian mask and then apply it with conv2. | Using default size of convolution kernel [3,3]. | |
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2.Sharpen an image using fspecial(ʻunsharpʼ) and imfilter | |
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3. Insert a ghost into an image, however youʼd like. |  Reading from an .png file containing "zombie bill" image complete with alpha data. Inserting into background scene with a transparency of 0.2 |
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4. Reveal hidden nightlife in a dark image, using either histeq or a gamma transformation. | Using matlab builtin histeq to reveal hidden nightlife. |  |
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