| Benchmark Images | 323016 | 113044 | ||
| Contour Operators | Gradient | Laplacian | Gradient | Laplacian |
| Reduced order | 0.4669 | 0.1962 | 0.2021 | 0.2996 |
| Marginal order | 0.4670 | 0.1956 | 0.2031 | 0.2992 |
| Lexicographical order | 0.4707 | 0.1960 | 0.2134 | 0.2996 |
| Order by bit mixing | 0.4698 | 0.1958 | 0.2074 | 0.3001 |
| Proposed order | 0.4592 | 0.1953 | 0.1867 | 0.2980 |