Differbetween
The Key Difference between Raster Scan and Random Scan, In Raster Scan electron beam, is swept across the screen, one row at a time, from top to bottom. Random Scan electron beam is directed only to the parts of the screen where a picture is to be drawn.
- What is the difference between raster and random scan display?
- What is difference between vector scan display and raster scan display in computer graphics?
- What is random scan display?
- What is random scan and raster scan Mcq?
- How does raster scan work?
- What is the need of interlacing?
- What is horizontal and vertical retrace in raster scan display?
- What is CRT explain with diagram?
- Which algorithm is orientation dependent?
- Why is random scan system designed?
- Which of these is a characteristic of midpoint circle algorithm?
- How many types of CRT are there?
What is the difference between raster and random scan display?
In random scan, mathematical function is used for image or picture rendering. While in which, for image or picture rendering, raster scan uses pixels.
What is difference between vector scan display and raster scan display in computer graphics?
The main difference between vector and raster graphics is that raster graphics are composed of pixels, while vector graphics are composed of paths. A raster graphic, such as a gif or jpeg, is an array of pixels of various colors, which together form an image.
What is random scan display?
In Random-Scan Display electron beam is directed only to the ares of screen where a picture has to be drawn. It is also called vector displays, as it draws picture one line at time. It can draw and refresh component lines of a picture in any specified sequence. Pen plotter is an example of random-scan displays.
What is random scan and raster scan Mcq?
Question 1: What are Random scan and Raster scan techniques? Explanation: The Random scan and rater scan are the display techniques using which (any one) an image is displayed on the screen.
How does raster scan work?
In a raster scan system, the electron beam is swept across the screen, one row at a time from top to bottom. As the electron beam moves across each row, the beam intensity is turned on and off to create a pattern of illuminated spots.
What is the need of interlacing?
With an interlaced display the picture is created by scanning every other line, and on the next scan, scanning every opposite line. Interlacing allows for a faster refresh rate by having less information during each scan at a lower cost.
What is horizontal and vertical retrace in raster scan display?
The return to the left of the screen, after refreshing each scan line is called the horizontal retrace. And at the end of each frame, the electron beam returns to the top left corner of the screen to begin the next frame is called the vertical retrace.
What is CRT explain with diagram?
The CRT in a computer display is similar to the"picture tube" in a television receiver. A cathode ray tube consists of several basiccomponents, as illustrated below. The electron gun generates anarrow beam of electrons. ... Theelectron beam produces a tiny, bright visible spot when itstrikes the phosphor-coated screen.
Which algorithm is orientation dependent?
Floating point arithmetic in DDA algorithm is still time consuming. The algorithm is orientation dependent. Hence end point accuracy is poor.
Why is random scan system designed?
Random-scan systems are designed for line-drawing applications and can- not display realistic shaded scenes. Since picture definition is stored as a set of line-drawing instruction and not as a set of intensity values for all screen points, vector displays generally have higher resolution then raster system.
Which of these is a characteristic of midpoint circle algorithm?
which of these is a characteristic of midpoint circle algorithm? Produces pixel points for an semicircle.
How many types of CRT are there?
There are two main types of CRT displays used in computer graphics. The first type, random-scan displays, are used primarily to draw sequences of line segments. The controller for the CRT maintains a display list that consists of a sequence of line segments specified by their endpoints in screen coordinates.
