When you are a baby who still have not mastered the art of language or had a pair of strong legs to run away from your scary uncle that just loves run his thick beard over your face, all you can do is dream. In the sweet dreams, you store the greetings from your parents, the faces you encounter and the textures of skins and fabrics into separate drawers in your brain to let your neurons grow.
When you are depressed about life or excited about a new date, you had your virtual practices at night.
Some pretty interesting facts about dreams:
1. Only a small portion of people dream in full colors
2. You can't see yourself clearly in a mirror in your dreams (a good reality check)
3. Only a few people can control the events in their dreams
4. We only dream about things we know
5. the longest dream won't last over 5 min (there seems to be a relativity happening here)
6. we can't remember 90% of our dreams, but keeping a diary could help (tip)
7. Blind people do dream as well
However, we can't remember our dreams most of the time. How can we burn it into a blue-Ray CD and share it ?
There are two current feasible solutions:
1. brain implants
Tiny micro-implants that are placed 0.5mm into the occipital cortex of the brain. The tiny changes in electric potentials will will give the hint to the content of your thinking. Unless you are willing to crack your skull open for about several hours...not recommended.
Hopefully Yoichi Miyawaki can give us some idea from the study of visual image reconstruction.
Yoichi Miyawaki, Hajime Uchida, Okito Yamashita, Masa-aki Sato, Yusuke Morito, Hiroki C. Tanabe, Norihiro Sadato, Yukiyasu Kamitani, ``Visual image reconstruction from human brain activity using a combination of multi-scale local image decoders,'' Neuron, 60, 915-929 (2008).
Below is a demo for the group's experiment on real human objects. The reconstruction error is very high, and yet it is not restricted to the training set. In stead of just giving one shot on the finest resolution, they overlay several images with different resolutions, and this works !