The Images of the TWL version included in the Imperial Encyclopaedia are definitely different from the ones in other editions, especially the First Collectanea of Heavenly Studies. They also carry legends! I think this is related to the fact that the Imperial Encyclopaedia was printed with movable type (one of the very few works in traditional China to use that technology).
Does the Qiankun tiyi have any images at all? We should check that.