- #1

DaveC426913

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## Main Question or Discussion Point

A geometry puzzle:

Say I want to obtain an image of an object (eg. a toy car) from every possible angle in 3-dimensions, in, say, 15 degree increments. How many pictures would I need to take?

The immediate answer is 576.

1] Rotate the car around X axis through 360 degrees in 15 degree increments. Take 24 pictures.

2] Now rotate the car around Y axis by 15 degrees.

3] Repeat steps 1 and 2 23 more times.

24x24=576.

But here's the thing, many shots will be duplicates, merely the same angle of the object but with the image rotated.

So, what is the

It occurs to me that this might be simpler if I left the object stationary and moved the camera. Then I would sidestep the whole duplicate angle thing...

Say I want to obtain an image of an object (eg. a toy car) from every possible angle in 3-dimensions, in, say, 15 degree increments. How many pictures would I need to take?

The immediate answer is 576.

1] Rotate the car around X axis through 360 degrees in 15 degree increments. Take 24 pictures.

2] Now rotate the car around Y axis by 15 degrees.

3] Repeat steps 1 and 2 23 more times.

24x24=576.

But here's the thing, many shots will be duplicates, merely the same angle of the object but with the image rotated.

So, what is the

__minimum__number of pictures I would need to take?It occurs to me that this might be simpler if I left the object stationary and moved the camera. Then I would sidestep the whole duplicate angle thing...