The LEGO Group released a few "mosaic" sets a while back, which came with clear baseplates and a bunch of 1x1 bricks. I have been wondering recently if it is possible to use an image as a reference when building one of these.
Unfortunately, this is hard because digital images can have a lot more colors than there are actual LEGO colors.
I am not interested in anything more than 1x1 bricks on a baseplate, regardless of the fact that the image has some other bricks added onto those 1x1s. The scenes which I would be interested in building would effectively be two-dimensional.
Is there perhaps a way (besides approximating) to change the pixels of an image into actual LEGO colors? Is there perhaps some type of web-application for this?