Time-Displacement Photography via Scanner Normal DSLR cameras record the light all at once as soon as it hits the sensor. With scanners, however, the light is recorded by having a strip of light go up and down the frame very slowly to light up your subject. You can use this to your advantage to create some really stunning flesh manipulations.
In order to twist and morph your face as you see in these images, you need to move your face up and down along the strip of light as it moves. Remember that the light is only being recorded where the strip of light is. The image above had the cathode light in a vertical position (as seen in the reflection of the glasses) that moved from left to right. For the first few seconds that the light was moving from left to right, my face was held still so the scanner could scan my face like normal, but right when it hit the middle of the chin, I stared slowly lifting by head upward, making sure to keep it in line with the cathode as it moved, then stopped to let the light finish recording the other half of my face. There are a lot of different combinations of shifting, tilting, and rotating you can implement when using a face, body part, or object on your scanner. Note: If your into this type of thing, it has also been done using video. Here is a popular youtube video that shows timedisplacement.
Trick Photography and Special Effects - 14.14.2011 - Copyright 2011 Evan Sharboneau – Page 143