NPTEL Computer Vision Week 8 Assignment Answers 2024
1.
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2.
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3. Which of the following statements are correct?
a) Color captured in the RGB color spaceis not suitable for direct interpretation of color components.
b) CIE Chromaticity Chart represents colors in a 2-D space according to tri-stimulus model of color representation.
c) In digital cameras color images are mostly captured using a CFA.
d) Luminance Y is encoded using less bits than chrominance values I and Q.
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4. Consider that the color of a source illuminant is represented by an RGB vector (100, 150, 200), whereas the target color is given by (50, 150, 100). Given a color vector (100, 100, 100) in the source image, compute the color corrected vector using diagonal correction rule.
a) (150, 75, 150)
b) (75, 150, 75)
c) (50, 100, 50)
d) (100, 50, 100)
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5. Interpolate 𝐺5 using laplacian corrected edge correlated interpolation using given Bayer’s pattern.
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6. Given the coordinates in the normalized x-y chromaticity space of three primary colors as (2/3, 1/3), (1/5, 3/4), and (1/6, 1/10), compute the corresponding maximally saturated color in the x-y chromaticity space preserving the same hue and intensity for the given point (0.31, 0.27) in x-y chromaticity space. Evaluate all the results upto three decimal places.
a) approximately (0.489, 0.308)
b) approximately (0.708, 0.186)
c) approximately (0.189, 0.108)
d) approximately (0.208, 0.286)
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7. Using interpolation by averaging red and blue hues, compute 𝐺8.
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8. Using interpolation by averaging red and blue hues, compute 𝐵12.
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9. Which of the following statements are true?
a) Image reconstruction using color demosaicing lead to sharp edges in an image.
b) Green channel is less likely to be aliased.
c) In CFA, green channels are sampled at a higher rate than red and blue.
d) High correlation between red, green and blue channels are very likely to have similar texture and edge locations.
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10. Given Bayer’s pattern.
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