2021-10-25, 10:36 PM: Quiz Submissions - Test 1 - CISC/CMPE 457 Image Processing F21 - onQ Page 1 of 8https://onq.queensu.ca/d2l/lms/quizzing/user/quiz_submissions_att…16230&isInPopup=0&cfql=0&fromQB=0&fromSubmissionsList=1&ou=590897 Quiz Submissions - Test 1 Yichi Zhang (username: 16yz107) Attempt 1 Written: Sep 24, 2021 7:50 AM - Sep 24, 2021 9:40 AM Submission View Question 1 0 / 4 points PIXEL ADDITION When averaging many noisy greyscale images of the same scene, what happens to the image if the noise has a mean greater than zero? A the noise will be reduced; the image will not become brighter B the noise will be reduced; the image will become brighter C the noise will not be reduced; the image will not become brighter D the noise will not be reduced; the image will become brighter Enter your primary response as A, B, C, or D in the first box below. Enter your secondary response as A, B, C, or D in the second box below. Fill both boxes. The primary and secondary responses should be the same if you are confident of your answer. Primary answer is worth 3 if correct. Secondary answer is worth 1 if correct. Answer for blank # 1: B Answer for blank # 2: B (A, A) Your quiz has been submitted successfully. 2021-10-25, 10:36 PM: Quiz Submissions - Test 1 - CISC/CMPE 457 Image Processing F21 - onQ Page 2 of 8https://onq.queensu.ca/d2l/lms/quizzing/user/quiz_submissions_att…16230&isInPopup=0&cfql=0&fromQB=0&fromSubmissionsList=1&ou=590897 Question 2 0 / 6 points CONVOLUTION Let H be a 3x3 averaging filter (i.e. each weight is 1/9). H can be applied twice to an image like this: I' = H * (H * I) or its product can be calculated and applied once like this: P = H * H I' = P * I Suppose the image has N pixels and the convolution H * I takes 9 N multiplications. We assume that there are zeros outside the image that need to be multiplied where the filter is non-zero, and that the image does not change size after a convolution. How many multiplications does the convolution P * I take, not counting any multiplications to compute P itself? A 9 N B 25 N C 81 N D none of the above Enter your primary response as A, B, C, or D in the first box below. Enter your secondary response as A, B, C, or D in the second box below. Fill both boxes. The primary and secondary responses should be the same if you are confident of your answer. Primary answer is worth 4 if correct. Secondary answer is worth 2 if correct. Answer for blank # 1: A Answer for blank # 2: A 2021-10-25, 10:36 PM: Quiz Submissions - Test 1 - CISC/CMPE 457 Image Processing F21 - onQ Page 3 of 8https://onq.queensu.ca/d2l/lms/quizzing/user/quiz_submissions_att…16230&isInPopup=0&cfql=0&fromQB=0&fromSubmissionsList=1&ou=590897 (B, B) Question 3 6 / 6 points NEIGHBOURHOODS In 2D, which of the points listed below has the same distance from (0,0) in all three metrics: the Manhattan metric and in the Euclidean metric and in the Chessboard metric? A (10,10) B (100,0) C (100,100) D none of the above Enter your primary response as A, B, C, or D in the first box below. Enter your secondary response as A, B, C, or D in the second box below. Fill both boxes. The primary and secondary responses should be the same if you are confident of your answer. Primary answer is worth 4 if correct. Secondary answer is worth 2 if correct. Answer for blank # 1: B (50 %) Answer for blank # 2: B (This answer was used in another blank.) (B, B) Question 4 6 / 6 points HISTOGRAM EQUALIZATION In an image with pixel values in [0,255], of the pixel values are evenly distributed in the range [64,127] and of the pixel values are evenly distributed in the range [128,191]. Which pixel value in the image maps to 127 in the histogram-equalized image? 1 3 2 3 N (s + 1)/256 = (i)r R 2021-10-25, 10:36 PM: Quiz Submissions - Test 1 - CISC/CMPE 457 Image Processing F21 - onQ Page 4 of 8https://onq.queensu.ca/d2l/lms/quizzing/user/quiz_submissions_att…16230&isInPopup=0&cfql=0&fromQB=0&fromSubmissionsList=1&ou=590897 You can start with the formula and solve for . You do not need to know . A 127 B 143 C 159 D 175 Enter your primary response as A, B, C, or D in the first box below. Enter your secondary response as A, B, C, or D in the second box below. Fill both boxes. The primary and secondary responses should be the same if you are confident of your answer. Primary answer is worth 4 if correct. Secondary answer is worth 2 if correct. Answer for blank # 1: B (50 %) Answer for blank # 2: B (This answer was used in another blank.) (B, B) Question 5 3 / 3 points DYNAMIC RANGE What is the dynamic range of a monitor that uses 8-bit greyscale pixels and has no noise? A 1 B 255 C 256 D infinity Enter your primary response as A, B, C, or D in the first box below. Enter your secondary response as A, B, C, or D in the second box below. Fill both boxes. The primary and secondary responses should be the same if you are confident of your answer. N (s + 1)/256 = (i)∑ri=0 hR r N 2021-10-25, 10:36 PM: Quiz Submissions - Test 1 - CISC/CMPE 457 Image Processing F21 - onQ Page 5 of 8https://onq.queensu.ca/d2l/lms/quizzing/user/quiz_submissions_att…16230&isInPopup=0&cfql=0&fromQB=0&fromSubmissionsList=1&ou=590897 Primary answer is worth 2 if correct. Secondary answer is worth 1 if correct. Answer for blank # 1: B (50 %) Answer for blank # 2: B (This answer was used in another blank.) (B, B) Question 6 6 / 6 points BILINEAR INTERPOLATION Given pixel values at these locations I[2,3] = 5 I[3,3] = 10 I[2,4] = 8 I[3,4] = 2 what is the bilinear interpolated value at (2.3, 3.6)? A 6.62 B 6.47 C 6.32 D 6.25 Enter your primary response as A, B, C, or D in the first box below. Enter your secondary response as A, B, C, or D in the second box below. Fill both boxes. The primary and secondary responses should be the same if you are confident of your answer. Primary answer is worth 4 if correct. Secondary answer is worth 2 if correct. Answer for blank # 1: C (50 %) Answer for blank # 2: C (This answer was used in another blank.) (C, C) 2021-10-25, 10:36 PM: Quiz Submissions - Test 1 - CISC/CMPE 457 Image Processing F21 - onQ Page 6 of 8https://onq.queensu.ca/d2l/lms/quizzing/user/quiz_submissions_att…16230&isInPopup=0&cfql=0&fromQB=0&fromSubmissionsList=1&ou=590897 Question 7 3 / 3 points GAMMA CORRECTION If gamma ( ) correction causes the image to become brighter overall, which of the following statements is true? A B C D E Enter your primary response as A, B, C, D, or E in the first box below. Enter your secondary response as A, B, C, D, or E in the second box below. Fill both boxes. The primary and secondary responses should be the same if you are confident of your answer. Primary answer is worth 2 if correct. Secondary answer is worth 1 if correct. Answer for blank # 1: D (50 %) Answer for blank # 2: D (This answer was used in another blank.) (D, D) Question 8 0 / 6 points TRANSFORMATIONS Which of the following transformations is used directly in the backward projection algorithm to scale an image by around the point ? A γ γ ≥ 1.5 γ > 1 γ = 1 γ < 1 γ ≤ 0.67 s (x, y) ⎡ ⎣ ⎢⎢ ⎤ ⎦ ⎥⎥ ⎡ ⎣ ⎢⎢ ⎤ ⎦ ⎥⎥ ⎡ ⎣ ⎢⎢ ⎤ ⎦ ⎥⎥ 2021-10-25, 10:36 PM: Quiz Submissions - Test 1 - CISC/CMPE 457 Image Processing F21 - onQ Page 7 of 8https://onq.queensu.ca/d2l/lms/quizzing/user/quiz_submissions_att…16230&isInPopup=0&cfql=0&fromQB=0&fromSubmissionsList=1&ou=590897 B C D Enter your primary response as A, B, C, or D in the first box below. Enter your secondary response as A, B, C, or D in the second box below. Fill both boxes. The primary and secondary responses should be the same if you are confident of your answer. Primary answer is worth 4 if correct. Secondary answer is worth 2 if correct. ⎡ ⎣ ⎢⎢ 1 0 0 0 1 0 −x −y 1 ⎤ ⎦ ⎥⎥ ⎡ ⎣ ⎢⎢ s 0 0 0 s 0 0 0 1 ⎤ ⎦ ⎥⎥ ⎡ ⎣ ⎢⎢ 1 0 0 0 1 0 x y 1 ⎤ ⎦ ⎥⎥ ⎡ ⎣ ⎢⎢ 1 0 0 0 1 0 x y 1 ⎤ ⎦ ⎥⎥ ⎡ ⎣ ⎢⎢ s 0 0 0 s 0 0 0 1 ⎤ ⎦ ⎥⎥ ⎡ ⎣ ⎢⎢ 1 0 0 0 1 0 −x −y 1 ⎤ ⎦ ⎥⎥ ⎡ ⎣ ⎢⎢ 1 0 0 0 1 0 −x −y 1 ⎤ ⎦ ⎥⎥ ⎡ ⎣ ⎢⎢⎢ 1 s 0 0 0 1 s 0 0 0 1 ⎤ ⎦ ⎥⎥⎥ ⎡ ⎣ ⎢⎢ 1 0 0 0 1 0 x y 1 ⎤ ⎦ ⎥⎥ ⎡ ⎣ ⎢⎢ 1 0 0 0 1 0 x y 1 ⎤ ⎦ ⎥⎥ ⎡ ⎣ ⎢⎢⎢ 1 s 0 0 0 1 s 0 0 0 1 ⎤ ⎦ ⎥⎥⎥ ⎡ ⎣ ⎢⎢ 1 0 0 0 1 0 −x −y 1 ⎤ ⎦ ⎥⎥ 2021-10-25, 10:36 PM: Quiz Submissions - Test 1 - CISC/CMPE 457 Image Processing F21 - onQ Page 8 of 8https://onq.queensu.ca/d2l/lms/quizzing/user/quiz_submissions_att…16230&isInPopup=0&cfql=0&fromQB=0&fromSubmissionsList=1&ou=590897 Answer for blank # 1: B Answer for blank # 2: A (D, D) Attempt Score:24 / 40 Overall Grade (highest attempt):24 / 40 Done