The Penumbral Theory The purpose of the theories of halftone photography is to determine the intensity of light at any microscopic point of ... The penumbral theory of Deville (1896), expounded by Clerc4 and Calmels in 1908 was used to determine by purely geometrical ... screen opening, and, after all calculations have been made the points are plotted on a diagram representing the screen opening.
|Author||:||Bruce E. Tory|
|Publisher||:||Sydney : [s.n.] - 1959|