Table 1.
Hahn’s Moment Invariants , Translation of Character “R”
| Hahn Moment Invariants |
---|
Translation Vector (TV) | | | | | | | | | |
---|
0 0 | | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
| | | | | | | | | |
Performance | | | | | | | | | |
Table 2.
Hahn’s Moment Invariants , Scaling of Character “R”
| Hahn Moment Invariants |
---|
Scaling Factor (SF) | | | | | | | | | |
---|
1 | | | | | | | | | |
0,8 | | | | | | | | | |
0,9 | | | | | | | | | |
1,1 | | | | | | | | | |
1,2 | | | | | | | | | |
Performance | | | | | | | | | |
Table 3.
Hahn’s Moment Invariants , Rotation of Character “R”
Rotation Angle (RA) | Hahn Moment Invariants |
---|
| | | | | | | | |
---|
0 | | | | | | | | | |
45 | | | | | | | | | |
90 | | | | | | | | | |
135 | | | | | | | | | |
180 | | | | | | | | | |
Performance | | | | | | | | | |
Table 4.
Hahn’s Moment Invariants , Mixed Transformation of Character “R”
| Hahn Moment Invariants |
---|
Mixed Transformation | | | | | | | | | |
---|
TV: (0 0); SF:1; RA:0° | | | | | | | | | |
TV: ( ); SF:0,8; RA:45° | | | | | | | | | |
TV: ( ); SF:0,9; RA:90° | | | | | | | | | |
TV: ( ); SF:1,1; RA:135° | | | | | | | | | |
TV: ( ); SF:1,2; RA:180° | | | | | | | | | |
Performance | | | | | | | | | |
Table 5.
Classification Results of the Set of Binary English Characters and Numbers by Using Distance
Invariant Moments | Noise Free | Salt and Pepper Noise |
---|
1% | 2% | 3% | 4% |
---|
Hu | 100% | 95.5% | 86.23% | 76.26% | 72.25% |
Krawchouk | 100% | 97.12% | 94.32% | 91.25% | 89.56% |
Hahn | 100% | 97.5% | 94.26% | 92.45% | 92.23% |
Table 6.
Classification Results of the Set of Binary English Characters and Numbers by Using Distance
| | Salt and Pepper Noise |
---|
Invariant Moments | Noise Free | 1% | 2% | 3% | 4% |
---|
Hu | 100% | 94.28% | 84.12% | 75.03% | 71.24% |
Krawchouk | 100% | 96.85% | 92.64% | 90.26% | 89.95% |
Hahn | 100% | 97.56% | 93.94% | 92.15% | 92.14% |
Table 7.
Classification Results of COILL-20 Objects Database by Using Distance
| | Salt and Pepper Noise |
---|
Invariant Moments | Noise Free | 1% | 2% | 3% | 4% |
---|
Hu | 94.58% | 92.26% | 85.27% | 74.86% | 70.01% |
Krawchouk | 96.48% | 95.17% | 90.87% | 85.98% | 77.25% |
Hahn | 97.35% | 96.71% | 91.45% | 86.58% | 78.56% |
Table 8.
Classification Results of COILL-20 Objects Database by Using Distance
| | Salt and Pepper Noise |
---|
Invariant Moments | Noise Free | 1% | 2% | 3% | 4% |
---|
Hu | 93.56% | 91.25% | 85.21% | 73.42% | 68.87% |
Krawchouk | 95.79% | 94.18% | 90.64% | 84.76% | 76.54% |
Hahn | 96.27% | 96.11% | 91.15% | 88.44% | 77.86% |
Table 9.
Average Times and Reduction Percentage of Hahn’s Invariant Moments for Binary and Gray-Scale Images
| Average Time Computation of HMI by | |
---|
Set of | Direct Method | Fast Method | ETIR% |
---|
Binary images | 0.1418 | 0.0485 | 65.80% |
Gray-scale images | 0.2562 | 0.1025 | 59.59% |