Color Theories And Analysis B.E Question Paper : jaduniv.edu.in
Name of the University : Jadavpur University
Department : Printing Engineering
Degree : B.E
Subject Name : Color Theories And Analysis
Year/Sem : IV/II
Website : jaduniv.edu.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/dspace.jdvu.ac.in/5439-Color%20Theories%20and%20Analysis.pdf
Color Theories & Analysis Question Paper :
B. Print Engg. Part–I Examination, 2007 :
(2nd Semester)
Time : Three hours
Related : Jadavpur University Material Testing B.E Question Paper : www.pdfquestion.in/5437.html
Full Marks : 100
Answer any five questions. :
1. a) What are the purpose of using mark ?
b) Draw the block diagram of direct color separation and describe how the color correction and contrast correction is done by using two marks in the process ? 5+15=20
2. a) Deduce Modified Yule-Nielson equation.
b) Using the above-mentioned equation, find out the reflection density of a cyan print having 55% dot area. The transmittance of ink is 19%, paper reflectance 92%, internal reflectance 20% and first surface reflection is 4%. 15+5=20
3. The densities of a set of solid color patches are given in Table 1.
a) Identify the cyan, magenta and yellow patch from patch 1, 2, and 3.
b) Deduce marking equation.
c) Find out the amount of cyan, magenta and yellow ink (in term of density) for a particular patch where the original densities are Dr = 0.96, Dg = 1.21 and Db = 0.42. Use the data of solid patches from Table 1.
d) What is the color of the patch. 2+10+6+2=20
4. a) What are the different color spaces commonly used ?
b) Why L, a, b color spaces are preferred in comparison to other when color management is applied ?
c) How dominant wavelength and excitation purity is found from the spectrophotometric curve of a colorant ?
d) What is the limitation of CIE system ?
e) If the Munsell notation of two colors are 5G 2—7 and 2G 7—5 , find out the color difference between this two. Explain the difference of two colors in terms of hue, value and chroma. 2+2+10+2+4=20
5. a) What is the additivity rule and the proportionality rule ?
b) How the halftone structure affects proportionality failure ?
c) What are the factors affecting additivity failure — describe the factors ?
d) How the additivity failure can be minimised ? 4+4+10+2=20
6. a) What is the utility of color management system ?
b) What are the major components of color management system ?
c) How are the profiles created for scanner and monitor ?
d) What are the two ways of color processing ?
e) What are the different types of rendering intents ? 4+4+4+4+4=20
7. The curves of absorption and scattering for carbon black, titanium dioxide and two yellow pigments are given in
a) Define Kubelka-Munk theory of color mixing.
b) Explain why Carbon Black appears yellowish in masstone.
c) Explain why Titanium dioxide appears yellowish in masstone.
d) Why the mixture of Carbon Black and Titanium dioxide appear Bluish ?
e) Why chrome yellow is brighter than Flavanthrone Yellow?
f) If 20% Carbon Black is mixed with 80% Flavanthrone Yellow, what will be the resultant color ? 4+2+2+2+4+6=20
8. Differentiate between : 4×5=20
a) UCR & GCR.
b) Optical metamerism and Geometric metamerism.
c) Masstone and Printone.
d) Direct Color Separation and Indirect Color Separation.
e) Gamut compression and clipping.
Syllabus :
Color Management Systems :
The need for color management systems and their architectures, Closed-loop color, Color space conversion, Characterization and calibration of devices, Color Standards, Color notation systems
Calculations of Colorimetric Quality Factor, Color processing of digital photographs, Color gamut calculations and mapping, Color management in digital film post-production. Creating and evaluating device Profiles, Color Management Tools.
References :
** Rich Adams and Joshua Weisberg, GATF Practical Guide to Color Management, GATF Press
** Phil Green, Color Engineering, GATF