Principle Of Color In Multimedia Cultural Studies Essay

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Color: Light is electromagnetic energy in the 400- to 700 nanometer wavelength part of the spectrum, perceived as the colors ranging through violet, indigo, blue, green, yellow, orange, and red.

The colors that we see in the world around us are generally not pure colors consisting of a single wavelength. Rather, color sensation results from the dominant wavelength of the light reflecting off or emanating from an object.

Color Terminology:

Hue - color

Monochromatic color - a color that is created from only one wavelength. (Most colors that we experience are NOT monochromatic. They result from a combination of wavelengths. The dominant wavelength gives us our color sensation.)

Chrominance - color information

Luminance - lightness or brightness information

Additive color systems - based on adding colored light (as in computer monitors). A combination of all colors gives white.

Subtractive color systems - based on adding pigments (as in printing). A combination of all colors gives black.

Human Perception of Color:

To humans, color sensation is a matter of subjective perception resulting from the effect of light on the cones of the eyes.

There are three types of cones, each one with a particular sensitivity to red, green, or blue light.

This decomposition of light into three color components is called the tristimulus theory of color and is the basis for the RGB color model.

Q2. How an appearance of an image on a monitor is depend on monitor resolution and monitor size?

Ans:

Three Ways To Tweak Your PC Monitor For High Quality Display & Performance:-

Three Ways To Tweak Your PC Monitor For High Quality Display & Performance

1. Adjust your monitor's brightness & contrast either manually or automatically. Use a high-quality video source with a good color range as a reference for your settings.

2. Upgrade your graphic card drivers to the latest features supported by your card. Use a screen calibration software to optimize your monitor further.

3. Use a good-quality cable between your monitor & CPU. Check the connectors for any bent pins and replace them in time to maintain hardware integrity.

Q3. Discuss the physical and psychological principles as to why animation works, as well as how it is Usually presented.

Ans: Principles ofr colors:

Squash and stretch.

Anticipation

Staging.

Straight ahead.

Follow through and overlapping action.

Slow out and slow-in.

Arcs.

Secondary action .

Timing.

Solid drawing.

Q4.What are the different color models? What is the need to use different color models?

Ans:

RGB color model:

Testing Color Response for RGB Model:

To create the RGB color model, it is necessary to determine how much of each color component is needed to create all the dominant wavelengths in the visible spectrum.

This is done by projecting "pure" colors onto one screen, mixing amounts of R, G, and B on a neighboring screen, and asking a large number of people to say when the colors match.

Matching color C is expressed by

C = R*R + G*G + B*B.

RGB Color MatchingRGB Color Matching:

The amounts of red, green, and blue light needed by an average observer to match color samples as they vary across the spectrum. (Luminance is kept constant.) A negative value means it is not possible to match the original color with RGB as primaries, so some R, G, or B has to be added to the original color sample.This graph shows the amounts of red, green, and blue light needed by an average observer to match color samples as they vary across the spectrum. (Luminance is kept constant.) A negative value means it is not possible to match the original color with RGB as primaries, so some R, G, or B has to be added to the original color sample.This graph shows the amounts of red, green, and blue light needed by an average observer to match color samples as they vary across the spectrum. (Luminance is kept constant.) A negative value means it is not possible to match the original color with RGB as primaries, so some R, G, or B has to be added to the original color sample.This graph shows the amounts of red, green, and blue light needed by an average observer to match color samples as they vary across the spectrum.

RGB Color on a Computer:

The RGB color model works well for computers because it matches the technology of monitors.

On a color monitor, color is produced by exciting three adjacent dots made of red, green, and blue phosphors. Because the dots are so small, they are blended into one color by the eye. Note that the color is not blended by putting one color of light over another - it is blended by the eye.

Not all colors perceivable by humans can be shown on a computer screen with the RGB model.The same RGB values will not necessarily result in the same colors on two different monitors because monitors are not calibrated to a single standard.RGB colors are not pure, saturated colors. This is because the kind of light emitted by an excited phosphor is not of a single wavelength, but has a spectral power distribution over a band of frequencies.

RGB is perceptually non-linear. This means that equal differences in the RGB values do not correspond to equal differences in the perceived color. Low RGB values produce small changes in color on the screen (as you move from one low value to the next). Large RGB values produce very perceivable differences as you move from one high RGB value to the next.

CIE Color:

The earlier graph showing RGB color matching demonstrates that not all visible colors can be represented with RGB as primaries. (You can't add positive amounts of RGB to get all the colors. In some cases, you have to "take some color away" from the original sample being matched.)

The Commission Internationale de l'Eclairage (CIE) decided that we need a standard color model that is based on primaries which, when mixed together, produce all the visible colors.

Another motivation for the CIE model is that the RGB and CMYK models are device dependent. That is different monitors use different R, G, and B colors of phosphors. Different printers use different CMYK colors of ink. CIE standardization gives us a way to map between systems.

CMYK model:

CMYK is primarily a printing color model.

Cyan, magenta, and yellow are called the subtractive primaries.

In practice, cyan, magenta, and yellow don't produce all the colors needed for printing. Blacks come out muddy. So a pure black is added in. That's the K.

Cyan, magenta, yellow, and black

Cyan is white light with red taken out.

C = G + B = W - R

Magenta is white light with green taken out.

M = R + B = W - G

Yellow is white light with blue taken out.

Y = R + G = W - B

Cyan, magenta, yellow, and black

Cyan is white light with red taken out.

C = G + B = W - R

Magenta is white light with green taken out.

M = R + B = W - G

Yellow is white light with blue taken out.

Y = R + G = W - B

HSV:

HSV stands for hue, saturation, and value (where value represents lightness or brightness).

Some people find the HSV model more intuitive than RGB. It is easier to think of colors in terms of their hue, tint, and shade rather than as combinations of red, green, and blue.

Q5. What advantages does the computer provide over traditional animation practices?

Ans: Advantages of the computer over traditional animation practices:

Computer animation can be used to explain things such as: the complicated molecular structure of DNA, the interaction of parts in a mechanical system, how a building is constructed, or the path of an accident vehicle.

Animation can help a trial lawyer, inventor, or research scientist tell their story.

Models in the animation can vary from simple shapes to complex photo-realistic objects. Models are built by drawing three dimensional objects in the computer. 

Animating th mythological heroes.

Making the Simulation of laboratory experiments.

For Production of images which look realistic.

Making the transformation of the abstract thoughts into concrete images.

Q6. Discuss where and how you might use animation in one of the following project? Be creative. How could it best be used to visually illustrate a concept?

Ans:

Computer animation has become commonplace on TV and in movies:

The animation previously described is built and produced inside a computer. The process is comparable to producing a movie. First you determine the overall story line, then you build and arrange the movie set and finally you set up the lights, camera and shoot the action. The concepts and message you want to convey will determine the overall complexity of the animation.

Apart from entertaining us, computer graphics and animation help us solve and explain engineering problems with visualization of a process or event:

They allow us to perceive objects in relation to their surroundings in a clear-cut presentation.

This color image is from a 3-4 minute animation produced by Unified Engineering. The purpose was to explain the workings of a hammermill used to crush and shred material fed in from the top. The ducts, mill housing, and pulley guard have been made semi-transparent to show the target audience the movement of material through the mill, the movement of the hammers to crush the materials, the exiting of the shredded material from the bottom of the mill, and the way in which power is transmitted from the motor to the mill. Used as an exhibit with engineering testimony it provides a clear understanding of the overall area and specific accident details.

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