NAME OF SCHOOL : SMK SERI RAUB
NAME OF CANDIDATE : UMI NADILA BINTI AMZAM
IC NUMBER : 940127-06-5304
INDEX NUMBER : CR012A054
Wednesday, 29 June 2011
Wednesday, 22 June 2011
Saturday, 11 June 2011
WEB CAMERA
Definition of: Webcam
(WEB CAMera) A front-facing video camera that attaches to a computer typically via USB or that is built into a laptop or desktop screen. It is widely used for Skype and other video calling software as well as to continuously monitor an activity and send it to a Web server for public or private viewing. Webcams purchased as separate peripherals generally have a microphone built into the unit, or an external mike comes in the package.
Webcams Vs. Network Cameras
A Webcam attaches to, or is built into, the computer, whereas a "network camera" is a stand-alone unit that connects to an Ethernet network. While the Webcam is commonly used for videophoning with another user, network cameras are used to monitor locations such as stores and offices.
VIDEO CAMERA
A camera that takes continuous pictures and generates a signal for display or recording. It captures images by breaking them down into a series of lines. For example, NTSC, the U.S. and Canadian analog standard uses 525 scan lines. Each line is scanned one at a time, and the continuously varying intensities of red, green and blue light across the line are filtered out and converted into a variable signal, which is most often converted to digital.
Although many models of analog camcorders and equipment are still available, the industry has long since switched to digital for video capture.
Monday, 9 May 2011
MOUSE
Definition of: mouse :
The most popular pointing device. Called a "mouse" because the cord resembled a mouse's tail, most mice today are cordless. Graphical interfaces (GUIs) are designed for mice but key commands for equivalent functions in business applications are often available as an alternative. However, CAD and imaging applications demand a pointing device. On a PC, the mouse connects to the PS/2 or USB port (see PS/2 connector).
After years of use, it is now known that mice can be hazardous to your health. Hours of clicking and dragging put a strain on the wrist (see carpal tunnel syndrome).
Relative Vs. Absolute
Mouse movement is relative. The cursor moves from its existing location. The mouse could be moved across your arm, and the screen cursor would move as well. The mouse-like object on a graphics tablet, which is correctly called the "tablet cursor" or "puck" is often not relative. It contacts the tablet with absolute reference. Placing it on the upper left part of the tablet moves the screen cursor to the corresponding location.
The most popular pointing device. Called a "mouse" because the cord resembled a mouse's tail, most mice today are cordless. Graphical interfaces (GUIs) are designed for mice but key commands for equivalent functions in business applications are often available as an alternative. However, CAD and imaging applications demand a pointing device. On a PC, the mouse connects to the PS/2 or USB port (see PS/2 connector).
After years of use, it is now known that mice can be hazardous to your health. Hours of clicking and dragging put a strain on the wrist (see carpal tunnel syndrome).
Relative Vs. Absolute
Mouse movement is relative. The cursor moves from its existing location. The mouse could be moved across your arm, and the screen cursor would move as well. The mouse-like object on a graphics tablet, which is correctly called the "tablet cursor" or "puck" is often not relative. It contacts the tablet with absolute reference. Placing it on the upper left part of the tablet moves the screen cursor to the corresponding location.
DIGITAL CAMERA
Definition of: digital camera
A still camera that records images in digital form. Unlike traditional film cameras that record a light image on film (analog), digital cameras record discrete numbers for storage on a flash memory card or optical disc. As with all digital devices, there is a fixed, maximum resolution and number of colors that can be represented. Images are transferred to the computer with a USB cable, a memory card or wireless. Digital video cameras (see camcorder) also use FireWire.
Digital Advantages
There are three distinct advantages of digital cameras over their analog counterparts. First, you can review the finished image immediately and erase the others. Second, you can take and print one picture without waiting to develop an entire roll of film. Finally, memory cards, the storage mechanism most widely used for "digital film," are reusable over and over.
Definition of: digital camera
A still camera that records images in digital form. Unlike traditional film cameras that record a light image on film (analog), digital cameras record discrete numbers for storage on a flash memory card or optical disc. As with all digital devices, there is a fixed, maximum resolution and number of colors that can be represented. Images are transferred to the computer with a USB cable, a memory card or wireless. Digital video cameras (see camcorder) also use FireWire.
Digital Advantages
There are three distinct advantages of digital cameras over their analog counterparts. First, you can review the finished image immediately and erase the others. Second, you can take and print one picture without waiting to develop an entire roll of film. Finally, memory cards, the storage mechanism most widely used for "digital film," are reusable over and over.
JOYSTICK
A pointing device used to move an object on screen in any direction. It employs a vertical rod mounted on a base with one or two buttons. Joysticks are used extensively in video games and in some CAD systems. They are also just one element in more elaborate game controllers (see video game controller). The term comes from the main control stick in a small airplane.
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