| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| proceedings of spie vol 2556 | 1.3 | 0.8 | 113 | 93 | 28 |
| proceedings | 0.38 | 0.6 | 402 | 59 | 11 |
| of | 1.6 | 0.2 | 7549 | 24 | 2 |
| spie | 0.4 | 0.3 | 5384 | 14 | 4 |
| vol | 1.79 | 1 | 9223 | 52 | 3 |
| 2556 | 1.69 | 0.4 | 3238 | 49 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| proceedings of spie vol 2556 | 1.11 | 0.7 | 8905 | 37 |
