Research Article
Multidirectional Gradient Neighbourhood-Weighted Image Sharpness Evaluation Algorithm
Table 1
Quantitative evaluation results of sharpness evaluation algorithm for the image sequence.
| Sharpness evaluation algorithm | Steepness width | Steepness | Flat area fluctuation | Sensitivity | Average calculation time (ms) |
| Gray variance function | 443 | 0.0025 | 0.05207 | 0.02025 | 0.744 | Brenner | 93 | 0.01905 | 0.02748 | 0.03829 | 1.400 | Roberts | 74 | 0.02383 | 0.02382 | 0.03417 | 1.410 | Vollath | 303 | 0.00593 | 0.03733 | 0.01798 | 0.598 | Prewitt | 337 | 0.00532 | 0.04404 | 0.01805 | 1.299 | Laplace | 248 | 0.00715 | 0.05764 | 0.148003 | 1.619 | Tenengrad | 337 | 0.00533 | 0.04394 | 0.01822 | 4.570 | Entropy function | 423 | 0.00419 | 0.05910 | 0.00691 | 1.240 | Fourier transform | 236 | 0.00762 | 0.04089 | 0.020261 | 1.418 | DCT transformation | 460 | 0.00274 | 0.04869 | 0.00344 | 1.995 | Wavelet transform | 340 | 0.00526 | 0.04883 | 0.01923 | 33.875 | Proposed method | 57 | 0.03140 | 0.01618 | 0.24595 | 6.209 |
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