IT-601 Computer Graphics and Multimedia - Dec 2024 Question Paper

Under each question, How to answer lists the points an answer should cover, outlined by CampusPrep from the syllabus. Check the details against your textbook.

1. 7 Marks
   aDerive the decision parameter used in Bresenham's Line Drawing Algorithm.
   How to answer

   • State line equation and Bresenham error concept for slope 0<m<1
   • Define initial decision parameter p0 and incremental update
   • Derive p(k+1)=p(k)+2dy-2dx(y(k+1)-y(k)) rule
   • Give selection rule p<0 vs p>=0 and algorithm steps
2. 7 Marks
   bExplain about different line drawing algorithms.
   How to answer

   • List DDA, Bresenham and midpoint line algorithms
   • Explain working principle of each
   • Compare accuracy, speed and computation
   • Give applications / example
3. 7 Marks
   aExplain briefly about Midpoint circle drawing algorithm with example.
   How to answer

   • State midpoint concept and circle symmetry
   • Define decision parameter p= x^2+y^2-r^2
   • Give iterative update and 8-way symmetry plotting
   • Illustrate with small radius example
4. 7 Marks
   bDiscuss about Sutherland Hodgeman polygon clipping algorithm with example.
   How to answer

   • State polygon clipping vs line clipping idea
   • Explain clipping against each window edge sequentially
   • Describe inside-outside test and intersection computation cases
   • Show before/after example polygon
5. 7 Marks
   aDistinguish between world coordinate system and screen coordinate system.
   How to answer

   • Define world coordinates: continuous, scene definition
   • Define screen/device coordinates: pixels, origin and range
   • Compare on definition, range, units and purpose
   • Explain window-to-viewport mapping link
6. 7 Marks
   bWhat is reflection and shear transformation? Discuss with examples.
   How to answer

   • Define reflection with mirror matrix about axes
   • Define shear with x-shear and y-shear matrices
   • Give numerical example for each
   • Show effect on object shape/position
7. 7 Marks
   aDerive the transformation matrix for rotation about an x-axis in 3D.
   How to answer

   • Recall 3D rotation about x-axis: y-z plane changes, x fixed
   • Use cos theta and sin theta geometry
   • Write 4x4 homogeneous transformation matrix
   • State final matrix form
8. 7 Marks
   bExplain in brief about the working process of 3D clipping.
   How to answer

   • Define 3D clipping against view volume
   • Explain clipping against 6 planes / frustum
   • Outline Cohen-Sutherland extension / Liang-Barsky 3D steps
   • Mention need for perspective normalization
9. 7 Marks
   aWrite short notes on Diffuse reflection.
   How to answer

   • Define diffuse reflection and Lambert's law
   • Give intensity formula I = Ip*kd*cos(theta)
   • Explain role of surface normal and light direction
   • Mention matte surfaces example
10. 7 Marks
    bExplain how we can define the objects for the multimedia systems in simple steps with suitable example?
    How to answer

    • Define multimedia objects: text, graphics, audio, video
    • List steps: class definition, attributes, methods, relationships
    • Explain with example e.g., image/audio object
    • Mention reuse and integration in authoring
11. 7 Marks
    aDiscuss briefly about the Multimedia Hardware.
    How to answer

    • Define multimedia hardware categories
    • Explain input, processor, storage, output devices
    • Give examples: scanner, sound card, GPU, CD/DVD
    • Mention role in capture and playback
12. 7 Marks
    bWhat are the different Presentation tools available? Explain them.
    How to answer

    • List presentation tools: PowerPoint, Flash, Director etc.
    • Explain features of each tool
    • Compare suitability for different media
    • Give use-case examples
13. 7 Marks
    aCompare and contrast lossy and lossless compressions.
    How to answer

    • Define lossy vs lossless compression
    • Compare on principle, ratio, quality and reconstruction
    • Give examples: JPEG/MP3 vs GIF/ZIP/RLE
    • Tabulate differences
14. 7 Marks
    bDefine Multimedia. Explain the applications of multimedia.
    How to answer

    • Define multimedia combining text, audio, video etc.
    • List key elements/characteristics
    • Explain applications: education, entertainment, medicine etc.
    • Give example for each application
15. 14 Marks
    Write short notes on any two of the following:

    1. i)Ray tracing
    2. ii)Audio Components
    3. iii)3D animation
    4. iv)MPEG Standards
    How to answer

    • Select any two topics from four options
    • Give definition and principle for each chosen topic
    • Explain working/components with example
    • Mention applications