In the 1st class we’ve done(thank you for the great informative class):
– theory of vision
– MAX MSP JITTER patches
1. colour theory revision:
The most common one is that we see at 30 fps (that’s “frames per second”) yet it seems that is just a general interpretation for use of different frame rates. It means 24 frames per second seems to be pretty effective – every time you see a movie in a theater, you’re seeing 24 discrete steps a second. Well, not quite – you’re actually seeing 24 steps, each shown twice at a total rate of 48 frames per second (more on that in just a second). But, still, 24 discrete steps a second seems to be enough to allow us to perceive smooth, constant motion.
According to the article, Various lab tests show that you can see white frame flicker rates above 200 frames per second! And you can see a photographer’s flash. The duration of the light from a photographic strobe is frequently .001 seconds long or shorter and it will frequently stay imprinted on your retina for quite a while. This is actually why video game hardware and software developers are constantly pushing the frame rate envelope. Surprisingly, the eyes are still able to see flicker in games running at 200 frames per second.
In fact, the main limitation on how fast you can see is actually the speed of chemical reaction in the rods and cones that are on the surface of your retina. The rods and cones are the actual cells that detect light striking the retina and and convert that signal into an electrical impulse that gets sent up the optic nerves to the brain.
The cone cells: primarily what we’re using for shooting. The center of your vision is primarily cone cells. Cones are the reason we can see color, and in fact are quite a bit like the pixels on a monitor. There are 3 different varieties that are sensitive to red, green, and blue light, respectively. We have about two times the number of green cones as we do red or blue cones, making our vision more sensitive to green hues than any other color.
Rod cells are more concentrated around the periphery of our vision. They only see luminance – that is, black and white. They’re smaller than cones, too, which effectively allows them to see more sharply. This is one way that birds see much more crisply than humans do – that eagle with disgustingly sharp vision has retinas that are comprised solely of rods. They trade that clarity for color vision. Rods are also much more sensitive than cones, taking only a single photon to stimulate them (cones take 4-5 photons). This is why you tend to lose color vision in dim lighting – the cones aren’t getting stimulated enough to generate a signal.
Ultimately, speed of vision depends on light up to 20 rounds per second.
-High and Standard definition AND 1080p 60 OR 1080i 60?
1,920 x 1,080 is the resolution of a high definition display. ‘1,920 x 1,080’ or ‘two million, seventy three thousand, six hundred’ ( 1,920 x 1,080 = 2,073,600), yet instead it’s called 1080. The high definition standard was created so TV and display manufacturers, Blu-ray disc printers, film and game development company chefs of all kinds had a set of common rules with which to work and create visually flavoursome splendour.
The ‘p’ stands for progressive scan, which refers to the fact that each frame of the image is created in one single pass from top to bottom. The ‘i’ stands for interlaced which means image frames are created in two passes, each pass filling every other line; a process which takes twice as long.
The ‘60’ part of 1080p60 denotes the number of frames per second (fps) being delivered onto the screen.
|720×576||576i||16:15||64:45||D1/DV PAL (ITU-R 601)|
|720×486||480i||8:9||32:27||D1 NTSC (ITU-R 601)|
Also, colour theory: YUV saturation changes
reviewing, patches (trying to figure out screen recording with sound)
Metro: Acts as a metronome which outputs bang s at a regular, specified interval. This object uses the Max time format syntax, so the interval that the metro object uses can be either fixed or tempo-relative.