Hide images within the noise of another image.
phn [hidden image] [source image]
if 'source image' is left out a solid background image will be generated
with the colour supplied by the c flag.
This will hide my github avatar in the noise of another picture
phn -o="hidden.png" "https://avatars1.githubusercontent.com/u/16108486?v=4&s=460" "https://i.imgur.com/gdnKZt1.png"
To retrieve the hidden image use
phn -decode -o="decoded.png" "hidden.png" "https://i.imgur.com/gdnKZt1.png"
| Flag | Description |
|---|---|
| w | width to resize both images to |
| h | height to resize both images to |
| c | background colour of generated image |
| d | colour depth of encoded image |
| o | output path of encoded image |
| decode | decode the given image |
| estimate | decode by attempting to extract the image noise with a gaussian blur |
| help | print help information |