Absolute pitch is the ability to correctly identify any musical note. It is close to another ability, relative pitch, which is the ability to identify any interval correctly, although relative pitch is usually described as the ability to correctly identify any note, once the subject has been given a "reference tone". An important fact here is that relative pitch is not as rare as absolute pitch, which may hint that absolute pitch is harder to acquire/train.
What kind of learning procedure would you design to learn absolute pitch?
In particular, I have two strategies in mind, and I don't think either would work. The first one is simple: a computer produces a note, the user identifies the note, the computer corrects the user. This is flawed because the first note in pair with the correct answer given by the computer provides a reference tone, therefore, after the first note, the user only trains his/her relative pitch. The second strategy would be to not correct the user immediately, but instead wait for example 10 notes before correcting. This seems flawed too, because of how crucial a quick feedback is to learning. Note that, with either strategies, it is not possible to make long learning sessions anyway, because it soon becomes a relative pitch training strategy.
Any clever idea?
An unhelpful suggestion would be grow up playing the violin or trombone. However, I think Yair's suggestion is a good one. I am not confident of developing absolute pitch if you havent mastered relative pitch. Musical examination often have a "aural" session which is all about relative pitch. As a result, there is a lot of teaching aids for learning and practising. A good start with a LOT of online resource is learning to sight-sing (assuming you can already read music). Just google sight-singing.