Research Article
Steganography Algorithm Based on the Nonlocal Maximum Likelihood Noise Estimation for Mobile Applications
Table 8
Standard deviation between the cover image and the stego-image.
| Test | Round | Red color channel | Green color channel | Blue color channel | General |
| 1 | 1 | 0.440569 | 0.502007 | 0.534010 | 0.492195 | 0.440599 | 0.502032 | 0.534038 | 0.492223 | 2 | 0.216114 | 0.245910 | 0.261501 | 0.241175 | 0.215749 | 0.245643 | 0.261274 | 0.240888 | 3 | 0.440569 | 0.502007 | 0.534010 | 0.492195 | 0.440599 | 0.502032 | 0.534038 | 0.492223 | 4 | 0.216114 | 0.245910 | 0.261501 | 0.241175 | 0.215749 | 0.245643 | 0.261274 | 0.240888 |
| 2 | 1 | 0.584381 | 0.544214 | 0.475694 | 0.534763 | 0.584401 | 0.544235 | 0.475715 | 0.534784 | 2 | 0.286027 | 0.266488 | 0.233207 | 0.261907 | 0.285871 | 0.266282 | 0.232901 | 0.261685 | 3 | 0.584381 | 0.544214 | 0.475694 | 0.534763 | 0.584401 | 0.544235 | 0.475715 | 0.534784 | 4 | 0.286027 | 0.266488 | 0.233207 | 0.261907 | 0.285871 | 0.266282 | 0.232901 | 0.261685 |
| 3 | 1 | 0.408481 | 0.514495 | 0.492052 | 0.471676 | 0.408335 | 0.514345 | 0.491905 | 0.471528 | 2 | 0.200647 | 0.252068 | 0.241177 | 0.231297 | 0.200129 | 0.251762 | 0.240835 | 0.230909 | 3 | 0.408481 | 0.514495 | 0.492052 | 0.471676 | 0.408335 | 0.514345 | 0.491905 | 0.471528 | 4 | 0.200647 | 0.252068 | 0.241177 | 0.231297 | 0.200129 | 0.251762 | 0.240835 | 0.230909 |
| 4 | 1 | 0.613440 | 0.505246 | 0.371941 | 0.496876 | 0.613467 | 0.505290 | 0.372000 | 0.496919 | 2 | 0.300155 | 0.247529 | 0.182978 | 0.243554 | 0.300049 | 0.247288 | 0.182452 | 0.243263 | 3 | 0.613440 | 0.505246 | 0.371941 | 0.496876 | 0.613467 | 0.505290 | 0.372000 | 0.496919 | 4 | 0.300155 | 0.247529 | 0.182978 | 0.243554 | 0.300049 | 0.247288 | 0.182452 | 0.243263 |
| 5 | 1 | 0.428864 | 0.453885 | 0.416717 | 0.433155 | 0.428927 | 0.453945 | 0.416778 | 0.433217 | 2 | 0.210543 | 0.222666 | 0.204646 | 0.212618 | 0.210163 | 0.222337 | 0.204241 | 0.212247 | 3 | 0.428864 | 0.453885 | 0.416717 | 0.433155 | 0.428927 | 0.453945 | 0.416778 | 0.433217 | 4 | 0.210543 | 0.222666 | 0.204646 | 0.212618 | 0.210163 | 0.222337 | 0.204241 | 0.212247 |
| 6 | 1 | 0.055659 | 0.040007 | 0.028091 | 0.041252 | 0.055694 | 0.040022 | 0.028069 | 0.041262 | 2 | 0.041434 | 0.037299 | 0.035184 | 0.037973 | 0.036975 | 0.032131 | 0.029434 | 0.032847 | 3 | 0.055659 | 0.040007 | 0.028091 | 0.041252 | 0.055694 | 0.040022 | 0.028069 | 0.041262 | 4 | 0.041434 | 0.037299 | 0.035184 | 0.037973 | 0.036975 | 0.032131 | 0.029434 | 0.032847 |
| 7 | 1 | 0.451941 | 0.240767 | 0.173620 | 0.288776 | 0.451968 | 0.240803 | 0.173655 | 0.288808 | 2 | 0.221483 | 0.120090 | 0.088852 | 0.143475 | 0.221121 | 0.119017 | 0.087216 | 0.142451 | 3 | 0.451941 | 0.240767 | 0.173620 | 0.288776 | 0.451968 | 0.240803 | 0.173655 | 0.288808 | 4 | 0.221483 | 0.120090 | 0.088852 | 0.143475 | 0.221121 | 0.119017 | 0.087216 | 0.142451 |
| 8 | 1 | 0.701288 | 0.382072 | 0.409695 | 0.497685 | 0.701312 | 0.382164 | 0.409761 | 0.497746 | 2 | 0.350049 | 0.191525 | 0.205166 | 0.248913 | 0.350071 | 0.191120 | 0.204810 | 0.248667 | 3 | 0.701288 | 0.382072 | 0.409695 | 0.497685 | 0.701312 | 0.382164 | 0.409761 | 0.497745 | 4 | 0.350049 | 0.191525 | 0.205166 | 0.248913 | 0.350071 | 0.191120 | 0.204810 | 0.248667 |
|
|