Quiz: Classic Vision

Let's test your memory. Ten questions on image basics and classic tools. Pause for each one, and commit to an answer.

• Ten questions
• Commit before the answer
• Keep score

Question 1

Question 1. How many numbers describe one pixel of a colour image? A, One. B, Three. C, Eight. D, Two hundred and fifty five. Pause the video and choose. The answer is B. Red, green, and blue.

Question 2

Question 2. Why use HSV instead of RGB for colour rules? A, It separates colour from brightness. B, It uses less memory. C, It is sharper. D, It removes noise. Pause the video and choose. The answer is A. Hue stays stable when the lighting changes.

Question 3

Question 3. What does a convolution do? A, Slides a small window and combines pixels. B, Deletes colour. C, Compresses files. D, Rotates images. Pause the video and choose. The answer is A. It's the basic operation of all vision.

Question 4

Question 4. Which blur is best for salt and pepper specks? A, Box. B, Gaussian. C, Median. D, None. Pause the video and choose. The answer is C. The median ignores extreme values.

Question 5

Question 5. What does Otsu's method choose? A, A blur size. B, A threshold. C, A kernel. D, A colour space. Pause the video and choose. The answer is B. It finds the valley between two hills in the histogram.

Question 6

Question 6. Which operation removes small white specks? A, Dilation. B, Opening. C, Closing. D, Rotation. Pause the video and choose. The answer is B. Opening erodes, then dilates.

Question 7

Question 7. What makes a good keypoint? A, A flat wall. B, A corner. C, A blurry area. D, An edge along a line. Pause the video and choose. The answer is B. Corners are unique in both directions.

Question 8

Question 8. What does RANSAC handle? A, Bad matches. B, Colour noise. C, Compression. D, Blur. Pause the video and choose. The answer is A. Wrong matches get outvoted.

Question 9

Question 9. What does a larger disparity mean? A, Further away. B, Closer. C, Brighter. D, Larger object. Pause the video and choose. The answer is B. Near objects shift more between two views.

Question 10

Question 10. Why do real photos need camera calibration? A, To find focal length and distortion. B, To add colour. C, To compress them. D, To train YOLO. Pause the video and choose. The answer is A. It lets you measure the real world.

Summary