In addition to lenna old timer image processing researchers would also have fond (depending whether your compression or edge detection algorithm worked correctly or not) memories of girl , cameraman , and barbara images as well as the infamous baboon ( https://goo.gl/images/4Js7YH ). I remember doing my senior thesis on 2D LPC in 1990 and since we did not know how to print images, in our report we just printed the pi…
https://www.researchgate.net/figure/Original-standard-test-i...