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Originally posted by gguyx
reply to post by elevenaugust
I'm trying to duplicate your calculation using a samsung SL102 with a jpeg picture I took.
How did you arrive at the degree figure? Number of pixels of the object as compared to the ExifImageWidth?
Originally posted by Imtor
So many pages?? I thought this was solves months ago... there is nothing in there worth the attention.
Originally posted by CHRLZ
Druid42, I don't mean to curb your enthusiastic efforts, but could you please show:
- an example of your methodology being applied to something known
- an example of the actual effect you are referring to using *any* other objects
- an indication of where you have taken into account the possible curvature of the mirror
- an indication of what you believe the reflection is on
I'll stop there, but there other issues..
Thing is, although the goats may be difficult to duplicate , the lighting conditions, mirror, sunglasses etc, etc are all pretty easy to roughly duplicate, and given that, with not too much effort you should be able to produce something at least vaguely like what you are trying to prove - ie a 'rogue' reflection...
The science of photogrammetry is quite complex and like most sciences, it doesn't really allow for unproven, undemonstrable approaches.. I'm happy to be shown examples, but until I see those..
Originally posted by DenyObfuscation
reply to post by elevenaugust
Can you see the focus distance in the EXIF of the "5 seconds before" shot? I can't. If you can, would you mind determining the width of the mirror housing in the UO shot and the 5 seconds before shot?
Originally posted by Druid42
As it stands right now, here are the conditions that I am adhering to, until otherwise refuted:
1. The picture hasn't been tampered with. The EXIF data is sound.
Originally posted by Druid42
2. The UO is just outside the focal range of the camera. (Either closer than 19 inches, or more than 35 inches away, thanks elevenaugust!)
Originally posted by Druid42
3. It is probably not a bag. Was not seen floating.
Originally posted by Druid42
4. It is probably not a bird. Same reason as #3.
Originally posted by Druid42
5. It is probably not a water droplet.
6. The UO has not been positively identified.
Originally posted by Druid42
That's not saying I am not open to any other ideas, but the "reflection anomaly" theory just seems to be the best explanation so far. Yeah, it's just an opinion, however, we are far from calling this over and inconclusive. Right?
Is it ok or do you want also an estimation of the sizes in cm?
OR... She saw the bag and simply didn't make any note of it because it was not a focus of her attention. I think this is a very big possibility. One point to make... All kinds of people take photos of bugs and birds and other stuff which when they view the photo are totally surprised. "It wasn't a bird. I didn't see a bird." Well, they didn't see the bird or simply paid no attention to it. THIS HAPPENS ALL THE TIME.
I'd agree that it has not been positively identified, but I still think it might possibly be a wind blown bag, or maybe a water droplet. Although if its a water droplet, how did it get there?
Originally posted by Druid42
Well, I have problems with the bag theory, as stated. Furthermore, you haven't accounted for the reflection on the bag. Others have pointed out the amount of trash along that section of road, and the fact that it was windy that day, so yes, it is possible. But, from the trash/litter post earlier in the thread, most of the trash is white or blue, the most common colors, quite opaque, and the fact that the bag would need to have a reflective coating to reflect light in the manner in which it is. Such a mylar bag, as stated, would have much less pliability than a simple grocery bag, as they usually have more than one layer, nor are shaped quite like that. Added layers means more weight, and less wind loft, and much harder to float in the air. Such heavier bags roll around the ground, and never get airborne. To have a bag float as high as it appears, it would by necessity need to be very lightweight, and shiny. If they made a shiny single layer plastic grocery bag, then by all means I would switch to the "bag theory" camp. I cannot. You can have your lightweight floating bag that is a dull matte finish, or you can have a reflective multilayered, heavier bag with obvious problems for floating by. Not both.
Originally posted by Druid42
The water droplet theory is goat sweat, but a google question, "Do goats sweat?" leads to the opinion that goats don't sweat. It was a sunny day, no precipitation, so the only viable source of moisture would be from the goats, either sweating or drooling. As caught as an airborne reflection, the probability for a flinging drop of any material from the goats being caught at that location, sorry, is even more remote than my reflection theory.
However, there are dried water marks on the side view mirror. That has bothered me a bit. Where did they come from? A recent car wash? A brief thunderstorm? Goat drool/sweating being flung against the car, and drying quickly in the hot sun? Would they be a factor in an out of focus anomaly?
A hot island and sunny conditions would refute an abundance of water droplets being present, much less catching one with a 1/2400 shutter speed. To further the nail in the coffin, Jeff has decided there was little to no motion blur, and a water droplet flies through the air, (as does a plastic bag) so such blur should be present in the picture. Relying upon Jeff's analysis, I would agree the object lacks any severe motion blur, and thus is a static object.
That almost rules out the "bag theory" and "water droplet" theory, right?
Originally posted by Druid42
If we can decide to rule out what it ISN'T, then we are that much closer to figuring out what it IS.
reply to post by Druid42
much less catching one with a 1/2400 shutter speed. To further the nail in the coffin, Jeff has decided there was little to no motion blur, and a water droplet flies through the air, (as does a plastic bag) so such blur should be present in the picture. Relying upon Jeff's analysis, I would agree the object lacks any severe motion blur, and thus is a static object.