Size of Object =# of pixels falling on the object The object is of arbitrary dimensions, so if we take photos of object from 1 meter distance, then 2 meter distance and so on. The number of pixels falling on the object will decrease. I want to know how will they decrease linearly or exponentially.

Lina Neal

Lina Neal

Answered question

2022-09-07

Size of Object = # of pixels falling on the object
The object is of arbitrary dimensions, so if we take photos of object from 1 meter distance, then 2 meter distance and so on. The number of pixels falling on the object will decrease. I want to know how will they decrease linearly or exponentially.

Answer & Explanation

vermieterbx

vermieterbx

Beginner2022-09-08Added 14 answers

If r is the distance then 4 π r 2 is the area of a sphere at that distance surrounding us
The object has area A
The fraction of the sphere it takes up is f = A 4 π r 2
Thus the number of pixels it falls upon will be proportional to r 2

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