Distribute bit encoding uniformly during steganography

[jj-style]

With the current implementation of least significant bit encoding it encodes the data in each colour channel in each pixel starting top left. Sharp eyed people may notice a bit of corruption especially if that part of the image should be all the same colour.

We should either:

• add a new steganography encoder/decoded that implements the Steganography which does least significant bit encoding but distributes it evenly; OR
• pass a generator in to constructor of LSB where calls to next return a pixel of the image to encode into
  • then can have multiple implementations, one that just starts top left and returns these
  • one that calculates an even distribution in the image and returns those

I like the second option more as it's a bit more general and the pixel generators could be reused in other steganography implementations

[smileyface12349]

I'll take this one

[jj-style]

Nice one yeah go for it. Just changing the current implementation to use PIL not opencv so will try push that up this evening

[smileyface12349]

Ah, is it going to be conflict hell if I start now?

[jj-style]

if you start a new file alongside LSB and don't touch steganography.py or lsb.py you should be okay. Minor change to the Image class but otherwise should be okay. Will try get it pushed up ASAP after testing so doesn't cause too many conflicts if you make a start now

[smileyface12349]

Ok I'll wait until you're done. No rush.

[jj-style]

Should be good to go now!