Research Article
Advanced Image Enhancement Method for Distant Vessels and Structures in Capsule Endoscopy
Table 4
Intensity enhancement in RGB channels.
| | R | G | B | R | G | B | R | G | B |
| | M1 | M2 | PM | Image 1 | 0.7122 | 0.9117 | 1.0103 | 0.3577 | 0.4580 | 0.5084 | 0.3432 | 0.3306 | 0.3392 | Image 2 | 0.5706 | 0.8545 | 0.9769 | 0.2868 | 0.4290 | 0.4905 | 0.2841 | 0.3005 | 0.2945 | Image 3 | 0.4384 | 0.8199 | 1.0248 | 0.2205 | 0.4119 | 0.5154 | 0.2080 | 0.1886 | 0.2131 | Image 4 | 0.5781 | 0.8063 | 0.9597 | 0.2905 | 0.4052 | 0.4827 | 0.2762 | 0.2407 | 0.2514 | Image 5 | 0.5706 | 0.7112 | 0.9256 | 0.2871 | 0.3580 | 0.4670 | 0.2744 | 0.2539 | 0.1740 | Image 6 | 0.6501 | 0.7229 | 0.9192 | 0.3279 | 0.3648 | 0.4674 | 0.3242 | 0.3333 | 0.2722 | Image 7 | 0.5860 | 0.9307 | 1.0007 | 0.2948 | 0.4680 | 0.5051 | 0.2933 | 0.3257 | 0.3099 |
| | HE | AHE | CLAHE | Image 1 | 0.4130 | 1.5860 | 2.9732 | 0.0055 | 0.3837 | 0.6665 | −0.0222 | 0.5710 | 1.0939 | Image 2 | 0.2875 | 0.8905 | 1.5424 | −0.0418 | 0.2090 | 0.4789 | −0.0958 | 0.2221 | 0.5715 | Image 3 | 0.2287 | 1.3171 | 3.0543 | −0.1207 | 0.2609 | 0.7773 | −0.1625 | 0.3879 | 1.1629 | Image 4 | 0.3425 | 1.5815 | 2.8684 | −0.0217 | 0.3595 | 0.6638 | −0.0416 | 0.5325 | 1.0731 | Image 5 | 0.6300 | 1.2110 | 3.6746 | 0.1006 | 0.2632 | 0.7072 | 0.1067 | 0.3879 | 1.3080 | Image 6 | 1.1621 | 1.5345 | 5.1613 | 0.1428 | 0.2312 | 0.9084 | 0.2708 | 0.4367 | 1.7947 | Image 7 | 0.3651 | 0.9644 | 2.7345 | 0.0288 | 0.2774 | 0.7700 | −0.0241 | 0.3060 | 1.0830 |
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