Computer Graphics Interview Questions Part – 3
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Top Computer Graphics Interview Questions Part – 3
Write Short Notes On Lines?
A line is of infinite extent can be defined by an angle of slope q and one point on the line P=P(x,y). This can also be defined as y=mx+C where C is the Y intercept.
Define Circle?
Circle is defined by its center xc, yc and its radius in user coordinate units. The equation of the circle is (x-xc) + (yyc)= r2.
What Are The Various Attributes Of A Line?
The line type, width and color are the attributes of the line. The line type include solid line, dashed lines, and dotted lines.
What Is Ant Aliasing?
The process of adjusting intensities of the pixels along the line to minimize the effect of aliasing is called ant aliasing.
What Is Transformation?
Transformation is the process of introducing changes in the shape size and orientation of the object using scaling rotation reflection shearing & translation etc.
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. Every point (x , y) in the object must under go a displacement to (x|,y|). the transformation is:x| = x + tx ; y| = y+ty
What Is Rotation?
A 2-D rotation is done by repositioning the coordinates along a circular path, in the x-y plane by making an angle with the axes. The transformation is given by:X| = r cos (q + f) and Y| = r sin (q + f).
What Is Scaling?
A 2-D rotation is done by repositioning the coordinates along a circular path, in the x-y plane by making an angle with the axes. The transformation is given by:X| = r cos (q + f) and Y| = r sin (q + f).
What Is Shearing?
The shearing transformation actually slants the object along the X direction or the Y direction as required. ie; this transformation slants the shape of an object along a required plane.
What Is Reflection?
The reflection is actually the transformation that produces a mirror image of an object. For this use some angles and lines of reflection.
What Are The Two Classifications Of Shear Transformation?
X shear, y shear.
A point (4,3) is rotated counterclockwise by an angle of45°. Find the rotation matrix and the resultant point
A point (4,3) is rotated counterclockwise by an angle of45°. Find the rotation matrix and the resultant point
What Is Computer Graphics?
The term computer graphics include almost every thing on computer that is not text or sound. It is an art of drawing pictures, lines. charts, etc. using computers with the help of programming.
Or we can say that graphics is the representation and manipulation of image data by computer with the help from specialized software and hardware. Graphic designing is done using the various available softwares for computers which can produce the 3D images in the required shape and dimension. Computer graphics help us in getting the real display experiences.
Write The Important Applications Of Computer Graphic?
Following are the applications of computer graphic
1. computer graphics is used in the field of computer aided design.
2. It is used to produce illustrations for reports or to generate slide for with projections.
3. Computer graphic methods are widely used in both fine are and commercial are applications.
4. The artist uses a combination of 3D modeling packages, texture mapping, drawing programs and CAD software.
5. In the field of entertainment CG methods are now commonly used in making motion pictures. music videos and television shows.
6. Computer-generated models of physical, financial and economic systems are often used as educational aids.
2. It is used to produce illustrations for reports or to generate slide for with projections.
3. Computer graphic methods are widely used in both fine are and commercial are applications.
4. The artist uses a combination of 3D modeling packages, texture mapping, drawing programs and CAD software.
5. In the field of entertainment CG methods are now commonly used in making motion pictures. music videos and television shows.
6. Computer-generated models of physical, financial and economic systems are often used as educational aids.
What Are The Raster And Vector Graphics?
The Raster and Vector graphics can be explained as-
RASTER-
In computer graphics image, or BITMAP, is a dot matrix data structure representing a generally rectangular grid of pixels or points of color, viewable via a monitor, paper, or other display medium. Raster image are stored in image files with varying formats.
VECTOR-
Vector graphics is the use of geometrical primitives such as points, lines, curves, and shapes or polygon, which are all based on mathematical expressions, to represent image in computer graphics. “Vector”, in this context, implies more than a straight line.
Write The Difference Between Vector And Raster Graphics?
Following are the differences between vector and raster graphics-
1. Raster or Bitmap images are resolution dependent because of this its not possible to increase or decrease their size without sacrificing on image quality.
While vector based image are not dependent on resolution. The size of vector image image can be increased or decreased without affecting image quality.
2. Raster or bitmap images are always rectangular in shape, Vector image, however, can have any shape.
3. Unlike raster image, vector image can’t be use for realistic images. This is because vector images are made up of solid color areas and mathematical gradients, so they can’t be used to show continuous tones of a colors in a natural photograph.
While vector based image are not dependent on resolution. The size of vector image image can be increased or decreased without affecting image quality.
2. Raster or bitmap images are always rectangular in shape, Vector image, however, can have any shape.
3. Unlike raster image, vector image can’t be use for realistic images. This is because vector images are made up of solid color areas and mathematical gradients, so they can’t be used to show continuous tones of a colors in a natural photograph.
What Is Scaling In Computer Graphics?
In computer graphic, image scaling is the process of resizing a digital image. scaling is a non-trivial process that involves a trade off between efficiency, smoothness and sharpness. With bitmap graphics, as the size of an image is reduced or enlarged, the pixels which comprise the image become increasingly visible, making the image appear “soft” if pixels are averaged, or jagged if not.
What Are The Hardware Devices Used For Computer Graphics?
The hardwares devices used for the computer graphics are
Input Devices:
Keyboard, Mouse, Data tablet, Scanner, Light pen, Touch screen, Joystick
Output Devices:
Raster Devices- CRT, LCD, LED, Plasma screens, Printers,Vector Devices- Plotters, Oscilloscopes
What Are The Features Of Inkjet Printers?
Features of inkjet printers are
1. They can print 2 to 4 pages per minute.
2. resolution is about 360d.p.i. Therefor better print quality is achieved.
3. The operating cost is very low. The only part that requires replacement is ink cartridge.
4. Four colors cyan, yellow, magenta, black are available.
2. resolution is about 360d.p.i. Therefor better print quality is achieved.
3. The operating cost is very low. The only part that requires replacement is ink cartridge.
4. Four colors cyan, yellow, magenta, black are available.
What Are The Advantages Of Electrostatic Plotters?
Following are the advantages of electrostatic plotters-
1. They are faster then pen plotters and very high quality printers.
2. Recent electrostatic plotters includes a scan conversion capability.
3. color electrostatic plotters are available. They make multiple passes over the paper to plot color picture.
2. Recent electrostatic plotters includes a scan conversion capability.
3. color electrostatic plotters are available. They make multiple passes over the paper to plot color picture.
Define Random And Raster Scan Displays?
Random scan is a method in which display is made by electronic beam, which is directed only to the points or parts of the screen where picture is to be drawn.
The Raster scan system is a scanning technique in which the electron sweep from top to bottom and from left to right. The intensity is turned on or off to light and un-light the pixel.
