http://datamoshing.com/2016/06/15/how-to-glitch-images-using-audio-editing-software/
This is the APP: https://snorpey.github.io/jpg-glitch/
It came from a story at The Verge http://www.theverge.com/2013/9/13/4726098/glitch-art-generator-snorpey-github
And these glitches can be made manually.
Tutorial on Databending and Glitch Art