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Stego Problem from CTF
Hi guys,
So I need help on this CTF problem. I feel like I'm doing something really wrong. The hint doesn't make much sense to me because if I mod every pixel by 8, the image becomes black.
Here's the image:
Description:
There’s an image of some trees here. I bet the image contains more than trees, though.
Hint given:
Try mod 8?
I'm not entirely sure about that. It's a RGB sorcery :o
Kinda related: https://www.mathworks.com/matlabcentral/answers/309680-why-does-the-red-plane-contain-the-whole-image
If someone roughly knows, please ELI5 for us :|