[pvillano]

One fun thing is that the camera is that the projection is perspective in the vertical axis and othographic in the horizontal axis. That's why "zooming out" is done by squashing the image horizontally.

Through a regular camera, a person near the track, and a statue 16x times as large but 16x further away would have the same apparent size. They would show up as the same number of pixels in width and height. However, with a line scan camera, the apparent width of objects does not change with distance. Those same objects would have the same apparent height, but the width of the larger statue would be 16x.

You can also think of the camera of having a virtual sensor that's a few cm tall and a variable width, from meters to miles wide. It can only capture scenes as wide as the virtual sensor, unless it's being rotated.