Dolly Zoom

[tom95521]

Trying to figure out how to do a Dolly Zoom also known as Hitchcock Zoom. Zooming image with opposite texture zoom. If anybody knows of another method to simulate in PTE I would be interested in learning how to do this.

http://en.wikipedia....wiki/Dolly_zoom

SkyDrive Link 2MB 16:9

http://sdrv.ms/Jo8w8g

Thanks,

Tom

[PGA]

Tom,

I'm not sure that we can recreate the Dolly Zoom effect fully in PTE. Reading that Wikipedia article I was left with the understanding that it involves changing the camera's position relative to the various subject items (using the focus dolly) and also changing the focal length of the lens (by zooming the lens in the opposite direction). But, when the focal length changes during the lens zoom, the depth of field also changes (wide angle = deeper depth of field, narrow angle = shallow depth of field), and I suspect this is crucial to the final visual effect.

In PTE we can simulate the focus dolly (using Pan Z in 3D) and we can simulate the changing focal length as far as it affects the angle of view (using 2D Zoom). What we cannot do in PTE, as far as I know, is change the depth of field (i.e. the zone of sharp focus - unless dynamic blur used in combination with a mask would give us this).

An interesting challenge!

regards,

[davegee]

You might get close with individual objects (.png files) zoomed differentially.

DG

[Lin Evans]

Maybe something like this?

MacIntosh Link

Windows PC Link

Lin

[tom95521]

Hi everybody,

Very nice Lin! I think Alfred Hitchcock used it in Vertigo and it was a very interesting effect. I like the idea of a blur to simulate the depth of field. All good ideas. The texture zoom opposite the image zoom makes the eyes wonder what's happeing but not quite as good as the real thing. Maybe I should add the Dolby audio pitch music they sometimes show at the beginning of movies ...

Thanks,

Tom

[David Porter]

Maybe something like this?

MacIntosh Link

Windows PC Link

Lin

Very nice Lin but might it be better if foreground object came slightly closer perhaps as though it were passing by on the RHS whilst the background got further away. I did something similar when videoing from a moving car, zooming out from the foreground object but not as quickly as the car was going forward. Pure luck of course but it looked quite effective. Don't know if that was what Hitch did.

[Lin Evans]

HI Mick,

I was just going by the Wikipedia explanation:

The effect is achieved by using the setting of a zoom lens to adjust the angle of view (often referred to as field of view or FOV) while the camera dollies (or moves) towards or away from the subject in such a way as to keep the subject the same size in the frame throughout.

There are probably lots of useful variations possible...

Best regards,

Lin

Very nice Lin but might it be better if foreground object came slightly closer perhaps as though it were passing by on the RHS whilst the background got further away. I did something similar when videoing from a moving car, zooming out from the foreground object but not as quickly as the car was going forward. Pure luck of course but it looked quite effective. Don't know if that was what Hitch did.