Is there a report of a successfully EEG-Based Brain-Computer Interface (BCI) using image training?
This article by Bobrov et. al seems to be similar to what you are looking for. They were able to classify (at above chance performance) whether subjects were imagining houses or faces. The training protocol is particularly interesting: they started by showing subjects pictures, but then used a feedback process of showing the subjects the output of the classifier while they were imagining the images to try and improve the subjects' 'imagination' of the images.