reply to post by Parabol
Hi, Parabol: let me say that i would like to see you often in Aliens and UFOs forum, becuse you could provide some excellent contributes also there:
i'll try to come here more often also because i find this forum interesting
The search for possible reflections in an image is always an extremely important step, well done on focusing also to it.
In order to evaluate the consistance of a reflection with the scenario, we should know, more or less:
position/s of the light source/s
type/s of propagation of the light source/s
position of the object allegedly being reflected
features of its surface (especially if it's reflective)
features of the surface to which the object is allegedly being reflected, its position and its orientation.
The list would be longer, bt this is more or less what we would need in this specific image: we know the position of the light source (the camera
itselfs, its flash) and also its propagation (radial, decreasing with the distance).
We don't know the position of the object: in order to know it for sure, we would need to do a triangulation, and it can be done only if the same
object is photographed from two (or more) points.
In this case we can tell for sure that the object is not very far, since it's between the camera and a definite background (the soil), but it's not
there are some empyrical methids to estimate the distance of an object, but it's out of focus, so there's no way to make any valid assessments on
its actual position: we can only guess
While we know all about the car.
There are some reasons that would make me rule out that the white dot in
the car is a reflection of a ball thrown in the air:
the first one is the position of the light source:
If it's a ball, or some other reflectant body, then it's strange that it's out of focus, as we have seen its appearance can't be explained only
with a motion blur: but let's assube that it is: the light source (A) hitting a spherical object should cast a reflection roughly to the point B,
while in order to cast a reflection in the point indicated on the car (D) the light source should be located more or less at the point C.
Keep in mind that this is a very rough calculation, (it would be worthless to spend too much tima on a single photo, it's just because your point is
good and because you have been the best contributor in this thread).
Besides, in order to cast a reflection so small, the object should have a concave surface, so it couldn't be a sphere:
Finally, how can we explain the absence of motion blur in the reflection?
It's REALLY nice to discuss with you, i hope to meet you often in the board mate
[edit on 23/8/2008 by internos]