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Event Driven Devices - Polling
Polling: The status of all devices is periodically checked in a repetitive manner through a polling loop. While an event happens, the loop is exited and the consequent event is handled by executing some special event-handling routine or task. Again the polling carries on. The disadvantage is, the processor has to stay in an idle state till some event happens. Data entered can be missing if an event happens at a time while the major program is not in its polling loop.
Functioning of Input Devices Functioning of input devices-Keyboard, mouse, trackball and space ball, Joystick, data glove, digitizer, scanner, touch panel, light pen, voice sys
What is translation? Translation is the process of changing the position of an object in a straight-line path from one coordinate location to another. Each point (x, y) in the
Perspective Projections - Transformation In this projection the center of projection is at limited distance. This projection is termed as perspective projection since in this
Analog Sound vs. Digital Sound Sound engineers have been debating the respective merits of digital and analog sound reproduction ever if the form of digital sound recordings.
Vector Graphics: These are images which may be entirely described by using mathematical definitions. The image below demonstrates the principle. To the left you notice the image i
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Lamberts Cosine Law - Diffuse Reflection "LAMBERTS COSINE LAW" specify that the radiant energy from any minute surface area dA in any direction θ relative to the surface usual
Painting and Drawing Tools Painting software is offered to producing crafted bitmapped images. Drawing software as Corel Draw and Canvas is offered to generating vector depend
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Education and training systems are making with three major objectives as: a) The learning objectives and purpose of the training. b) Assessment or testing of the students to
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