rgpv computer graphics and multimedia previous year exam papers , rgpv cs-504 CGM last 5 years exam papers,
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R.G.P.V. Bhopal (MP)
C.S. (5th Semester) EXAMINATION
COMPUTER GRAPHICS & MULTIMEDIA [CS-504]
Time: 3Hrs     Max Marks: 100     Min Marks: 35
Note:Attempt any 5 questions.All question Carry equal marks.
UNIT-I
Q.1.(a)  Describe the working of raster refresh display tube. How different grey levels are incorporated in it ?
       (b) What are the drawbacks of DDA line drawing algorithm ? How are they removed or minimized in Bresenham’s algorithm ?
OR
Q.2.(a) Differentiate between interlaced and non-interlaced monitors. What is the fraction  of the total refresh time per frame spent in retrace of electron beam for a non-interlaced raster system with resolution of 1280*1024, a refresh rate of 60 Hz, a horizontal retrace time of 5 microseconds and a vertical retrace time of 500 microseconds ?
      (b) Discuss how the use of homogeneous co-ordinates permits us to use  efficient computing of geometrical transformations in computer graphics.?
UNIT-II
Q.3.(a) Describe the composite transformation of two successive translations for three dimensional objects.?
       (b) Determine a sequence of  basic transformations that are equivalent to th x- direction shearing matrix.?
OR
Q.4.(a) Find the transformation required to reflect a polygon whose vertices are A(-1,0), B(0,-2), c(1,0), and D(0,2) about the line y=x+2. Find reflected image.?
      (b) What is scan-conversion ? Mention some side-effect of scan-conversion.?
UNIT-III
Q.5.(a) Write down the transformation matrix for shearing z-axis parallel projection method.?
       (b) Device the B-spline matrix for the standard cubic,uniform, non-rational B-spline. Show all of the working.?
OR
Q.6.(a) rotate a triangle A(0,0), B(2,2), C(4,2) about the origin and about p(-2,-2) as by an angle of 45. ?
       (b) Find the normalization transformation for mapping a window having (2,2)  as the lower left corner and (4,6) as the upper right corner onto:
                (i) A view port that is entire normalized device screen
                (ii) a view port having (0,0) as lower left corner and (1/2,1/2) as the upper right corner.
UNIT-IV
Q.7.(a) Name carious color models and explain each of them.?
       (b) Explain the following line-clipping algorithms:
              (i) Cohen-Sutherland algorithm
              (ii) Mid-point subdivision algorithm
OR
Q.8.(a) Which of the algorithm Cohen-Sutherland algorithm or Liang-Barsky algorithm is more efficient ? Why ?
       (b) Describe the Phongs specular reflection model with Fresnel’s law of reflection.
UNIT-V
Q.9.(a) What is basic  concept of Hypertext ?  Why are hypertext used for information representation in multimedia package ? Name the tools used to implement it.?
       (b) What are the evolving technologies of multimedia ?
OR
Q.10.(a) What is the key limitation of relational database in implementing multimedia applications ?
         (b) Give the compression technique used in Facsimile and Document Images.?
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