Group Photo Without Blinking
Calculate how many photos are needed to take a group photo in which everyone is not blinking.
Assumes that a person blinks for 0.25 seconds every 6 seconds.
1) Probability that 1 person does not blink = 1-(blink duration in seconds+shutter time in seconds)×blinks per second
2) Probability that all photos fail = (1-(Probability that 1 person does not blink)number of people)number of photos = 1-confidence÷100
3) number of photos = ln(1-confidence/100)÷ln(1-(Probability that 1 person does not blink)number of people)
This calculator improves a user-created calculator with graph support and other features.
Reference: Nic Svenson and Piers Barnes, "Blink-free photos, guaranteed", 2006 Ig Nobel Prize in Mathematics.
1) Probability that 1 person does not blink = 1-(blink duration in seconds+shutter time in seconds)×blinks per second
2) Probability that all photos fail = (1-(Probability that 1 person does not blink)number of people)number of photos = 1-confidence÷100
3) number of photos = ln(1-confidence/100)÷ln(1-(Probability that 1 person does not blink)number of people)
This calculator improves a user-created calculator with graph support and other features.
Reference: Nic Svenson and Piers Barnes, "Blink-free photos, guaranteed", 2006 Ig Nobel Prize in Mathematics.
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