[FFmpeg-devel] [PATCH v2 1/3] [GSoC] [AAC] aaccoder: Implement Perceptual Noise Substitution

[Paul B Mahol]

On 4/14/15, Rostislav Pehlivanov <atomnuker at gmail.com> wrote:
> The images will be retained for 356 days according to the formula left on
> the website. As long as it's guaranteed its better than anything else I've
> used, and it doesn't touch the images so you can replicate the results.
>
> Nevertheless, here's a backup of them just in case:
> Original: http://postimg.org/image/mzoix4goz/full/
> Encoded(without PNS): http://postimg.org/image/mvupgvb7n/full/
> Encoded(with PNS, const = 1.2(default)):
> http://postimg.org/image/kd90g6phf/full/
> Encoded(with PNS, const = 2.2): http://postimg.org/image/pshqh5h1f/full/
> Difference(no PNS -> PNS const 1.2):
> http://postimg.org/image/6v243wdc3/full/
> Difference(no PNS -> PNS const 2.2):
> http://postimg.org/image/g6o60upvn/full/
>
> To process the difference, the following command was used(from the
> imagemagick utils):
> '$ composite file1.png file2.png -compose difference diff1.png'
>

Same can be done with blend filter.