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31. 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. 

32. What is anti aliasing?

The process of adjusting intensities of the pixels along the line to minimize the effect of aliasing is called anti aliasing. 

33. 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. 

34. 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 

35. What is rotation?

A 2-D rotation is done by re positioning 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). 

36. What is scaling?

A 2-D rotation is done by re positioning 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). 

37. 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. 

38. 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. 

39. What are the two classifications of shear transformation?

X shear, y shear

40. A point (4,3) is rotated counterclockwise by an angle of 45°. Find the rotation matrix and the resultant point 

41. Name any three font editing tools.

ResEdit, FONTo grapher

42. Differentiate serif and sans serif fonts. 

Give one example Serif fonts has a little decoration at the end of the letter,but serif font has not. Times, new century schoolbook is the examples of serif fonts. Arial, optima are examples for sanserif fonts. 

43. Distinguish between window port & view port?

A portion of a picture that is to be displayed by a window is known as window port. The display area of the part selected or the form in which the selected part is viewed is known as view port. 

44. Define clipping?

Clipping is the method of cutting a graphics display to neatly fit a predefined graphics region or the view port. 

45. What is the need of homogeneous coordinates?

To perform more than one transformation at a time, use homogeneous coordinates or matrixes. They reduce unwanted calculations intermediate steps saves time and memory and produce a sequence of transformations. 

What is multimedia?

Multimedia is a technique that incorporates

• text,

• graphics,

• sound,

• animations and

• video elements.

2. What are the types of video compressions available?

There are two types of video compressions. They are:

• Lossless compression: Retains the exact image throughout the compression.

• Lossy compression: Provides a comparatively higher ratio of compression but results in some loss of quality.

3. What is interactive multimedia?

Multimedia applications that allow users to actively participate instead of just sitting by as passive recipients of information are called interactive multimedia. 

4. Mention the major uses of Multimedia?

• Multimedia is heavily used in the entertainment industry, especially to develop special effects in moves and animation for cartoon characters. 

• Multimedia games are a popular pastime and these are software programs available either as CD ROMs or online. 

• Some video games also use multimedia features.

• Question 1. What Is Scan Conversion?

Answer :

A major task of the display processor is digitizing a picture definition given in an application program into a set of pixel-intensity values for storage in the frame buffer. This digitization process is called scan conversion. 

• Question 2. Write The Properties Of Video Display Devices?

Answer :

Properties of video display devices are persistence ,resolution, and aspect ratio.

• Question 3. What Is Rasterization?

Answer :

The process of determining the appropriate pixels for representing picture or graphics object is known as rasterization. 

• Question 4. Define Computer Graphics.

Answer :

Computer graphics remains one of the most existing and rapidly growing computer fields. Computer graphics maybe defined as a pictorial representation or graphical representation of objects in a computer. 

• Question 5. Name Any Four Input Devices?

Answer :

Four input devices are keyboard, mouse, image scanners, and trackball.

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