To help content designers evaluate the readability of images in a short period, ie from 0.1 seconds up to 9.9 seconds, we created a small web app that allows users to load an image of their choice and set a viewing duration. The image will then display for that amount of time.
See it here: https://www.digitalview.com/epaper/timed-image.html
The motivation for this was our 84″ epaper signboard developed using E Ink epaper display technology. A low-power display technology that we find ideally suited for public signboards.