November 2007
Intermediate to advanced
736 pages
46h 32m
English
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PERSISTENCE OF VISION AND FLICKER
The image formed on the retina is retained for about 20 ms even after optical excitation has ceased. This property of the eye is called persistence of vision, an essential factor in cinematography and TV for obtaining the illusion of continuity by means of rapidly flashing picture frames. If the flashing is fast enough, the flicker is not observed and the flashes appear continuous. The repetition rate of flashes at and above which the flicker effect disappears is called the critical flicker frequency (CFF). This is dependent on the brightness level and the colour spectrum of the light source.
In cinema, a film speed of 16 frames per second was used in earlier films to obtain the illusion of movement. Lack of ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.