Thomas Diamond Painting

In a manner yes, what they use I think is a variation on the DMC software that is used to take a photo and convert it into a cross stitch canvas, this is very similar except it is sticking beads/gems/drills (various people call them various things) onto a canvas with a printed picture with a symbol for each pixel/gem and a self-adhesive layer.

If you want to get a custom one made you go find a sellter, order the size you want and supply them with the picture you want to have printed.  In return you receive a canvas printed to the size you paid for, a set of gems in the appropriate colours - on a bigger canvas you can get up to 40+ colours depending on the photo and a basic tool kit.  Here's an example picture of what you get;



The above example is a typical standard retail package, but the customs are similar in terms of what you get.  Some people may baulk a bit at the number of gems, and indeed a bigger canvas can take quite a few thousand gems to complete.  But I find making them up very relaxing, a bit like a puzzle i suppose and at the end of it you end up with a quite lovely looking picture fo long as you get one of the right size for the picture content.  Fundamental rule is the more detail you have the bigger you should go canvas wise.  It also pays to get 'square' gems rather than round, some people claim them to be harder to use, but I personally don't and you have several distinct advantages.  Firstly they are 20% smaller than the round ones so you get 25% more resolution (i.e. 5 gems to a cm as opposed to 4 round gems per cm), they fit together without any gaps round them and the overall image effect is more like a mosaic than you get with the round gems.