1. Digital Image Processing
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2. Digital Image Processing
Fourier Transforms:
Smoothing & Sharpening frequency domain filters
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3. Smoothing Frequency-domain filters: Ideal Lowpass filter
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4. image power circles
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5. Result of ILPF
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6. Why ringing effect
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7. Ringing Effect
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8. Butterworth low pass filter
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9. Butterworth Lowpass Filter: BLPF
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10. Example
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11. Spatial representation of BLPFs
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12. Gaussian low pass filters
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13. Gaussian Lowpass Filter: GLPF
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14. Example
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15. Gaussian low pass filters Example
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16. Example
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17. Example
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18. Sharpening in FD Ideal highpass filter Butterworth highpass filter
Gaussian highpass filter
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19. Example: result of IHPF
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20. Example: result of BHPF
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21. Example: result of GHPF
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22. Laplacian in frequency domain
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23. Laplacian in the Frequency domain
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24. Example: Laplacian filtered image
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25. Unsharp masking, high boost filtering
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26. Example: high-boost filter
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27. Examples
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