Design Development

Color, Image, Pixel

Primary and Secondary color
Monitors use Red, Green and Blue which are Primary color to display an Image. Black is 0 and white is 255
Adding of primary colors produces Secondary colour Cyan, Magenta and Yellow.
Mixing of two secondary color in equal amounts produce Tertiary colours and so on.
R+B=M ; G+B=C; R+G=Y; R+G+B=W
Additive Color : An Additive Color model involves light emitted directly from a source or illuminate. The additive reproduction process usually uses red, green and blue light to produce the other colors. Combining one of these additive primary colors with another in equal amounts produces the additive secondary colors cyan, magenta, and yellow. Combining all three primary lights (color) in equal intensities produces white.
Subtractive Color : A Subtractive Color model explains the mixing of paints, dyes, inks, and natural colorants to create a full range of colors, each caused by subtracting (that is, absorbing) some wavelengths of light and reflecting the others. The color that a surface displays depends on which colors of the electromagnetic spectrum are reflected by it and therefore made visible.Subtractive Color systems start with light, presumably white light. Colored inks, paints, or filters between the viewer and the light source or reflective surface subtract wavelengths from the light, giving it color. If the incident light is other than white, our visual mechanisms are able to compensate well, but not perfectly, often giving a flawed impression of the “true” color of the surface.
Process Color : Process color, also known as CMYK or 4-color process printing, uses cyan, magenta, yellow, and black to simulate thousands possible colors.
Spot Color : In offset printing, a spot color is any color generated by an ink (pure or mixed) that is printed using a single run
Tertiary color : A tertiary color is a color made by mixing either one primary color with one secondary color.
Color wheel: A color circle, based on red, yellow and blue, is traditional in the field of art. Sir Isaac Newton developed the first circular diagram of colors in 1666. Since then, scientists and artists have studied and designed numerous variations of this concept. Differences of opinion about the validity of one format over another continue to provoke debate. The color wheel is the basic tool for combining colors.
Hue : Hue is the colour sensation produced in an observer due to the presence of certain wavelengths of colour
Saturation: Saturation is a measure of colour intensity.
Brightness / Luminance: Luminance or Brightness is a measure of brightness of the light emitted or reflected by an object.
Tint : Tint is the amount of White in a color. More the tint in a color, lighter is the color. It is measured in a scale of 0 to 100. 100% tint gives us White color.
Shade : Shade is the amount of Black in colour. More the Shade in a colour, darker is the color. It is measured in a scale of 0 to 100. 100% shade gives us Black colour.
Tone : Tone is the amount of Grey in a color. More the Tone in a color, more greyish is the color. It is measured in a scale of 0 to 100. 100% tone gives us Grey color.
Opacity: Opacity is the opaqueness of a color. Lesser the opacity in a color more transparent is the color. It is measured in a scale of 0 to 100. 100% opacity gives us full opaque.
Value: Value is the lightness or darkness of a color. Lightened values are the tints of the color and darkened values are the shades of the color. Medium value colors are described as the mid-tones. A variation in light to dark arrangement of design is termed as a value pattern.
Image
An Image is a spatial representation of an object, a two or three dimensional scene
or another image.Image maybe:
• Still (Photographs, line drawings, Charts)
• Moving Pictures ( Series of Still images)
A digital image is considered as composed of a set of pixels (picture elements),
similar to dots, arraged according to a predefined ratio of columns and rows. Each
pixel represents a portion of the image in a particular of colour and its different
shades.
Raster
The Raster means a series of parallel sweeps by an electronic scanning device like
TV, Laser Printer / Photosetter imaging Device
In order to output to such Raster Setting Device
• The complete page image has to be created first in terms of ON-OFF signal
• Then exposed the total width of the page as series of horizontal sweeps from
top to down.
Therefore the Raster may be thought of a two dimensional array of pixel/dots.
Vector
Vector graphics is the use of geometrical primitives such as points, lines, curves, and
shapes or polygon(s), which are all based on mathematical equations, to represent
object in computer graphics. Vector graphics consists in encoding information about
shapes and colors.

Author

Picasso Multimedia

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