unlikely to harm or disturb anyone; "harmless old man"

producing no injury : harmless : not likely to give offense or to arouse strong feelings or hostility JPEG Joint Photographic Expert Group: The original name of the committee that designed the standard image compression algorithm. JPEG is designed for compressing either full-colour or grey-scale digital images of "natural", real-world scenes. It does not work so well on non-realistic images, such as cartoons or line drawings. JPEG does not handle compression of black-and-white (1 bit-per-pixel) images or moving pictures. Standards for compressing those types of images are being worked on by other committees, named JBIG and MPEG. http://wombat.doc.ic.ac.uk/foldoc/foldoc.cgi?query=JPEG