ECE 533 Project Tribute By: Justin Shepard & Jesse Fremstad

Project Proposal: Design software for restoring images. –Implement noise functions to degrade images –Then, implement the functions to restore the image to its original form.

Noise Functions Atmospheric Turbulence –Picture degraded from atmosphere Motion Blur –Results from moving the camera while the shutter is open Salt and Pepper –Random impulse noises Sinusoidal Noise –Constant Sinusoidal noise

Functions to Restore Images Salt & Pepper- Median, Adaptive Median, Arithmetic Mean Atmospheric – Inverse Filtering, Gaussian Low Pass Filter Motion Blur – Inverse Filtering Sinusoidal Blur – Butterworth, Gaussian, Ideal Band-pass & Band-reject, Notch Filters.

Original Image Used in Filters A 256x256 Picture of Jesse Taken By the ECE 533 Staff

Salt & Pepper Noise

Salt & Pepper: Results Best Results: Adaptive Median –Kept Most of Detail While Filtering Most of the Noise. Worst Results: 7x7 Arithmetic Mean –Didn’t Filter Very Well, Lost Too Much Detail Due to Smoothing.

Atmospheric Turbulence Original Image 2D Fourier Transform Noise Model in Frequency Domain Blurred Image

Filtered Image

Filter Results As you can see, the filtered results do not vary much from the original. The values for the inverse filter were too small to get any result, which explains the black image which was output Gaussian didn’t improve restoration of the image

Sinusoidal Filters – Band-Reject

Sinusoidal Filters – Band-Pass

Sinusoidal Filters – Notch

Conclusion / What We Learned Discovered Background to Many of the Image Filters We Used Understand at a Deeper Level of How these Filters and Algorithms Work Learned More about Signal Processing and how to use the Fast Fourier Transform Experience with Different Types of Filters, and Which Filters to Use for a Given Noise