Median filtering of speckle noise
Abstract
A digital model was developed which simulates the physical process of speckle noise generation in coherent imagery. This was used to determine the effectiveness of two-dimensional digital filters for the reduction of speckle noise. Median filters, ranked order filters, and separable combinations of these were evaluated and found to yield good improvement in image signal-to-noise ratios.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- February 1982
- Bibcode:
- 1982STIN...8315559G
- Keywords:
-
- Digital Filters;
- Image Processing;
- Signal Processing;
- Signal To Noise Ratios;
- Speckle Patterns;
- Coherent Radiation;
- Digital Simulation;
- Fast Fourier Transformations;
- Microwave Filters;
- Noise Intensity;
- Communications and Radar