the first hand held camera was invented in 1837.
the first hand held camera was invented in 1837.
when was the first hand held camera invented?
1837
Na
Na
in considering the transition from the text being presented by the computer to the user moving a camera across a printed page, bliss realized that there was a critical flaw in the design of the veteran administration stereotoner. since english alphabetic characters can be adequately displayed with 12 vertical pixels, the stereotoner designer had assumed that only 12 photocells would be needed in the camera. however, this assumes perfect alignment between the camera and the printed text, which is never the case with a hand held camera. when the alignment is random, as with a hand held camera, a well known engineering theorem states that twice as many pixels are needed. therefore, the optacon was designed with 24 vertical pixels instead of 12. this theorem isn’t applicable in the horizontal dimension, so the columns in a two dimensional array can be twice as far apart as the rows.
optacon