Focal length and compression of space
Bijan G. Mobasseri · 2002
Images taken with long telephoto lenses exhibit a characteristic perspective distortion known as compression of space. Objects that are actually far apart appear unusually close together, and observed texture gradients and optic flows impart a distorted sense of orientation and depth. An attempt is made to quantify the space compression. It is shown that only a full perspective model, rare in shape from texture literature for example, is able to compute the above effect.>