This programme uses STFT (Short Time Fourier Transform) [1] to transfer each column of image, interpreted as frequency domain data into time domain in LTR (left-to-right) order. That is, it makes an image display in a spectrogram [2].
- Hiding flags in CTFs.
- Hiding ... (you know what I mean 😏)
| [1] | https://en.wikipedia.org/wiki/Short-time_Fourier_transform#Inverse_STFT |
| [2] | https://twistedsifter.com/2013/01/hidden-images-embedded-into-songs-spectrographs/ |