[Solved] What is wrong with this motion detection loop?import cv2 cap = cv2.VideoCapture(0) while True: ret, frame1 = cap.read() ret, frame2 = cap.read() diff = cv2.absdiff(frame1, frame2) if diff.any():... | Raspberry Pi

Raspberry Pi - Camera Module

What is wrong with this motion detection loop?

import cv2
cap = cv2.VideoCapture(0)
while True:
    ret, frame1 = cap.read()
    ret, frame2 = cap.read()
    diff = cv2.absdiff(frame1, frame2)
    if diff.any():
        print("Motion detected")

AReading two frames inside the loop causes missed frames

Bdiff.any() is not a valid method

CMissing break condition to exit loop

Dcap.read() returns only one value

Step-by-Step Solution

Solution:

Step 1: Analyze frame reading inside loop
Reading two frames each loop skips frames and reduces detection accuracy.
Step 2: Correct approach
Read one frame per loop and compare with previous frame stored outside loop.
Final Answer:
Reading two frames inside the loop causes missed frames -> Option A
Quick Check:
Frame reading logic affects motion detection accuracy [OK]

Quick Trick: Read one frame per loop, compare with previous [OK]

Common Mistakes:

MISTAKES

Reading multiple frames per loop causing skips
Misusing diff.any()
Ignoring loop exit conditions

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What is wrong with this motion detection loop?

Step 1: Analyze frame reading inside loop

Step 2: Correct approach

Final Answer:

Quick Check:

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