Timeline for Noise Reduction - noisy lines
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 25, 2022 at 22:05 | comment | added | Peter K.♦ | @CrisLuengo Cool! Got it. Thanks for the explanation. | |
| Jun 25, 2022 at 21:18 | comment | added | Cris Luengo | In short, instead of removing only, say, (4,3) Hz, you removed all (4,x) Hz, for all values of x, including (4,0) Hz, which would be part of what forms those buildings. | |
| Jun 25, 2022 at 21:15 | comment | added | Cris Luengo | You are removing all frequencies that have a specific horizontal component. This is all sinusoidal waves where the horizontal distance between peaks is your selected value. Including a horizontal wave (vertical bars). The buildings are formed by many of these horizontal waves. By removing one of these components, you created this shadow effect. It is basically an echo of the buildings that appeared because you removed frequency components that are not part of the diagonal bar pattern you intended to remove. | |
| Jun 25, 2022 at 20:40 | comment | added | Peter K.♦ | @CrisLuengo interesting! Care to explain why? I don’t see it. | |
| Jun 25, 2022 at 14:25 | comment | added | Cris Luengo | You wouldn’t get a shadow if you did this with a 2D FFT. | |
| Jun 25, 2022 at 8:11 | vote | accept | adimath | ||
| Jun 25, 2022 at 0:47 | history | edited | Peter K.♦ | CC BY-SA 4.0 |
More explanation
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| Jun 24, 2022 at 16:16 | history | answered | Peter K.♦ | CC BY-SA 4.0 |