From: Application of compressed sensing for image compression based on optimized Toeplitz sensing matrices
Method used | Proposed PSO-optimized sensing matrices with BP and OMP | ||||||||
---|---|---|---|---|---|---|---|---|---|
Test images | Boat.bmp | Barbara.bmp | Mandrill.jpg | ||||||
Sensing methods and performance measures | Non-optimized Toeplitz with BP | PSO-optimized Toeplitz with BP | PSO-optimized Toeplitz with OMP | Non-optimized Toeplitz with BP | PSO-optimized Toeplitz with BP | PSO-optimized Toeplitz with OMP | Non-optimized Toeplitz with BP | PSO-optimized Toeplitz with BP | PSO-optimized Toeplitz with OMP |
Mutual coherence | 6.9924 | 6.3246 | 6.6991 | 6.9924 | 5.7139 | 6.6991 | 6.9924 | 6.3246 | 6.6991 |
PSNR (dB) | 59.1519 | 60.0348 | 49.2790 | 62.9252 | 64.1856 | 54.6056 | 55.0343 | 55.7781 | 47.7248 |
MSE | 175.4469 | 160.6205 | 470.8930 | 120.3017 | 106.0561 | 276.4328 | 264.8315 | 245.8492 | 550.0716 |
Reconstruction time (seconds) | 27.4589 | 13.1280 | 3.8159 | 15.3074 | 23.8537 | 3.8379 | 13.3598 | 12.7399 | 4.1206 |
Sensing matrix construction time | 0.0045 | 0.0013 | 0.0012 | 0.0047 | 0.0015 | 0.0013 | 0.0044 | 0.0013 | 0.0014 |