Computer Graphics
Computer Graphics
Computer graphics tells us that what are the actual working of
graphics. Computer Graphics remains one of the most existing and rapidly
growing computer field. Computer Graphics as the pictorial representation or
graphical representation of a computer.
Persistence
It is define as the time taken by the emitted light from the screen to
decay to 1/10 of its original intensity is called persistence. High persistence
required low refresh rate, and low persistence required high refresh rate. Low persistence
screen are used for animation and the high persistence screen are used of
static images.
Resolution
The no of pixels or points that can be displayed on the screen without
overlap is called resolution. It can also be defined as no of pixel per square
inch. For Example 800*600, 1024*768, 1900*1080.
Aspect
Ratio
Its give the ratio of vertical points to horizontal points(pixel).
Necessary to produce equal length line in both of direction. For Example 3:4
aspect ratio may mean 3 pixel vertical and 4 pixel horizontal are required to
draw equal length line.
Cathode Ray Tube
Direct
View Storage Tubes
Its store the picture information as charge distribution just behind
the phosphor. Its using two types of guns
Primary Guns : - Its Used To Store The Picture Panel.
Secondary Guns : - Its
Maintain The Picture Display.
Advantages
And Disadvantages Of DVST
Advantages : - The Major Advantages Of This, No Refreshing Is Required
And Complex Picture Can be Displayed Flicker.
Disadvantages : - The Disadvantage Of This type Of Monitor Is Selected
Part Of The Picture Cannot be Erased. The Whole Picture has to be Redrawn Which
Generally Takes A Lot Of Time That Is The Biggest Reasons Of Non Popularity Of
These Types Of Devices.
Flat Panel Display
Flat panel display are two types
(1) Emissive (2) Non Emissive
Emissive : - Emissive
display are those which convert electrical energy to light. For example 1.
Plasma Panel Display 2. LED (Light Emitting Diode) 3. Thin Electroluminescent
Devices.
Non Emissive : - Non Emissive use optional effects to convert sun light
or light from any other sources to graphical pattern for example LCD(Liquid
Crystal Display).
2D Transformation
Click Here To
See All 2D Transformations.
Scan Conversion Algorithms
Click Here To
See Scan Conversion Algorithms
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