Q1. Which operator is this?

[[-1 0 1]
[-2 0 2]
[-1 0 1]]

1. Sobel
2. Scharr
3. Prewitt
4. Laplacian

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Q2. Which of the following OpenCV functions can be used to threshold an image?

1. cv2.threshold()
2. cv2.thresh()
3. cv2.Thresh()
4. cv2.Threshold()

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Q3. In a high contrast image, _________?

1. everything looks nearly of the same intensity (dull, washed-out grey look)
2. everything looks clear to us

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Q4. Which technique is used to construct a color image from a Bayer image?

1. Sampling
2. Interpolation
3. Segmentation
4. Quantization

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Q5. Which of the following OpenCV functions can be used to create a structuring element?

1. cv2.getStructuringElement()
2. cv2.createStructEl()
3. cv2.createStructuringElement()
4. cv2.getStructEl()

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Q6. How to calculate the threshold value for adaptive Thresholding?

1. Mean of the pixel neighborhood
2. Weighted Mean of the pixel neighborhood
3. Median of the pixel neighborhood
4. Can be any of the above three

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Q7. In the expression g(x,y) = (k+1)*f(x,y) – k*b(x,y), if we set k=1 what is this technique called? Suppose f(x,y) is the input image, b(x,y) is its blurred version and g(x,y) is the output image.

1. Unsharp Masking
2. Highboost filtering
3. Laplacian of Gaussian
4. Difference of Gaussian

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Q8. Which of the following set operations are generally used in Morphological image processing?

1. Union
2. Intersection
3. Difference
4. All of the above

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