[Solved] What will be the output of this code snippet when motion is detected? import cv2 cap = cv2.VideoCapture(0) ret, frame1 = cap.... What will be the output of this code snippet when motion is detected? | Raspberry Pi

Raspberry Pi - Camera Module

What will be the output of this code snippet when motion is detected?

import cv2
cap = cv2.VideoCapture(0)
ret, frame1 = cap.read()
ret, frame2 = cap.read()
diff = cv2.absdiff(frame1, frame2)
gray = cv2.cvtColor(diff, cv2.COLOR_BGR2GRAY)
_, thresh = cv2.threshold(gray, 30, 255, cv2.THRESH_BINARY)
print(thresh.sum() > 10000)

ATrue if motion detected, False otherwise

BAlways prints True

CAlways prints False

DRaises a syntax error

Step-by-Step Solution

Solution:

Step 1: Understand the code logic for motion detection
The code compares two frames, converts difference to grayscale, thresholds it, then sums pixels to detect motion.
Step 2: Interpret the print statement
If the sum of thresholded pixels is greater than 10000, it prints True (motion detected), else False.
Final Answer:
True if motion detected, False otherwise -> Option A
Quick Check:
Threshold sum > 10000 means motion True [OK]

Quick Trick: Sum of thresholded diff > limit means motion detected [OK]

Common Mistakes:

MISTAKES

Assuming it always prints True or False
Confusing thresholding with color conversion
Expecting syntax errors from correct code

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What will be the output of this code snippet when motion is detected?

Step 1: Understand the code logic for motion detection

Step 2: Interpret the print statement

Final Answer:

Quick Check:

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