NPTEL Digital Image Processing Week 1 Assignment Answers 2024

1. In frequency domain, what is the equivalent operation of product of two functions in spatial domain?

a) correlation
b) convolution
C) Fourier transform
d) fast Fourier transform

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2. An image depicts IIT Kharagpur’s main building on a rainy day of cyclone “Remal”. Removal of rain streaks from the image is an example of

a) Image compression
b) Image restoration
C) Image enhancement
d) Image Analysis

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3. A photograph. W inches in width and H inches in height was scanned at 1000 dpi. The scanned image has a resolution of 100 pixels in width and 200 pixels in height What is the physical size of the image.

a. W=0.1 inches, H=0.2 inches
b. W=0.2 inches, H=0.1 inches
C. W=0.1 inches, H=0.1 inches
d. Some information is missing

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5. What is the number of bits required to store a 100 × 100 grayscale image with 256 gray levels?

a) 2560000
b) 10000
c) 80000
d) 240000

Answer :-

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7. What is the purpose of using a low pass filter in image digitization?

a. Resizing
b. Sharpening
c. Sampled Signal recovery
d. None of the above

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8. Choose the appropriate option depending on statements below:
Statement 1: Unit impulse function samples signal at multiple points
Statement 2: Comb function samples signal at a single point

a) Statement 1 is True, Statement 2 is True.
b) Statement 1 is False, Statement 2 is True.
c) Statement 1 is True, Statement 2 is False.
d) Statement 1 is False, Statement 2 is False.

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9. Which of the following is not studied under Digital Image Processing?

a) Designing lens geometry and choosing lens material for least chromatic and
spatial aberrations
b) Applying spatial filters with fixed coefficients for Image enhancement
c) Transforming image based on its statistical properties
d) Applying frequency transforms to image for Image compression