The reason is that by default Dev-C++ resource of header files does not contain this header file.
While using Dev-C++ IDE we notice/face a problem that we cannot use graphics.h header file. Shadow mark technology came under this.ĩ.It is common practice to use grpahics library which is called graphics.h in Turbo C++ IDE (Integrated Development Editor). Beam Penetration technology come under it.ħ.
Only screen with view on an area is displayed.ħ. Refresh rate does not depend on the picture.Ħ. Million Different colors to be generatedĭifferentiate between Random and Raster Scan Display: Random Scanĥ.For interlaced display refresh rate of 60 frames per second is used. In this first of all odd numbered lines are traced or visited by an electron beam, then in the next circle, even number of lines are located.įor non-interlaced display refresh rate of 30 frames per second used. This problem can be solved by Non-Interlaced scanning. Due to which fading of display of object may occur. In Interlaced scanning, each horizontal line of the screen is traced from top to bottom. Types of Scanning or travelling of beam in Raster Scan Then it will again more horizontally from top to bottom call as horizontal retracing shown in fig: When the beam starts from the top left corner and reaches the bottom right scale, it will again return to the top left side called at vertical retrace. First is horizontal retracing and second is vertical retracing. In Frame Buffer the positions are called picture elements or pixels. Raster Scan provides a refresh rate of 60 to 80 frames per second.įrame Buffer is also known as Raster or bit map. The raster scan system can store information of each pixel position, so it is suitable for realistic display of objects. Televisions in our house are based on Raster Scan Method. Information of on and off pixels is stored in refresh buffer or Frame buffer. Random-Scan monitors cannot display realistic shades scenes.Ī Raster Scan Display is based on intensity control of pixels in the form of a rectangular box called Raster on the screen.A CRT has the electron beam directed only to the parts of the screen where an image is to be drawn.Random-scan monitors are also known as vector displays or stroke-writing displays or calligraphic displays.
The system cycles back to the first line and design all the lines of the image 30 to 60 time each second. Each line segment is drawn on the screen by directing the beam to move from one point on the screen to the next, where its x & y coordinates define each point. The picture is constructed out of a sequence of straight-line segments. Random Scan System uses an electron beam which operates like a pencil to create a line image on the CRT screen. Next → ← prev Random Scan and Raster Scan Display: Random Scan Display:
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