Westminster fountain at sunset

by Jorge Córdoba

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13

There are several ways to [attempt to] determine the veracity of an image, with respect to whether it represents a unique capture of a single scene: Image data level inconsistencies Certain processing operations result in telltale "signatures" embedded in the data which are often invisible to the eye but may be identified by statistical analysis. The best ...


6

While you can't know for sure, the site fotoforensics.com can provide some insight. Be sure to read the tutorial and check this link for your image: From their analysis, I'd guess the photo has not been doctored. I'm not associated with this site in anyway, although I do think it's pretty interesting stuff.


6

It's very unlikely that double exposure could happen with a digital camera in the way it could occasionally occur unintentionally (and, often, intentionally) with film cameras. That's because there's no "film advance" mechanism in a digital camera. Each frame is read as a separate file, and there's no plausible way for them to get mixed up. If the ...


6

A quick Google found me this page, where it says: "Russian photographer Sergey Semenov shows you the NYC Central Park the way you’ve never seen it before. The amazing picture that won Semenov the best amateur award from the International Pano Awards, is stitched together from a bunch of 360-degree panoramic pictures, taken from a helicopter." Once you've ...


5

That's going to sound amazingly simple but open the image in your image editing software of choice (e.g. The GIMP), pick the "Select" tool, and select a rectangle encompassing your "object". In The GIMP, the size of the select box is displayed in the status bar at the bottom. There you go. Object height in pixels :)


5

No; digital files can't work that way. If the card were corrupt, you might see images jumbled together, but it would look like this at best, not a smooth overlay. Additionally, the filenames aren't really "slots". They're just identifiers; if they are reused, the same value appears in the "index" in the filesystem, but the data could be anywhere. It's ...


4

With a digital camera, it's much more likely to see something like this with a long exposure and multiple flashes firing during the exposure. If you google "long exposure multiple flash", you can see some examples of the effects possible with this technique, including some that appear somewhat ghostlike. One of the links returned does a decent job of ...


3

You would need to be familiar with photo editing techniques as well as limitations of camera equipment to be able to identify both what you would consider to be "photoshopped" as well as the signs of when it occurs. I'm fairly new to the game, but I can usually tell when an image has more dynamic range than is possible with camera equipment so maybe the ...


2

If you really want to get hard core, read the books on photo interpretation. I've got two by Dino Brugioni, who was part of the team that analyzed the Russian missles in Cuba during the cold war Cuban Missle crisis. They would look at the length of shaddows to calculate sun location, or if they had the sun location, use the shaddows to calculate height and ...


2

I found the answer after viewing another site from a link posted here concerning archiving negatives. In sum, unless the lab added the date (which some did) there is no way to determine the date from the code on back of the photo. The code is used by and for the lab (developers) and relates to paper, color correction, etc., technical information that may be ...


2

I found this book to be very interesting. http://www.amazon.com/Photo-Fakery-History-Deception-Manipulation/dp/1574881663 It was written by a CIA photo interpreter, one of the guys who found the Russian missiles in Cuba that the world called the Cuban Missile Crisis. It covers lots of "photo fakery" from the cold war.


2

Since it is a Ghost Tour, it would not surprise me if they made it special for the tourists with some tricks along the tour. When photographers use their in-camera flash it would be relatively easy to give them a photographic evidence of those ghosts in their own photos. It only needs an old film SLR camera with the rear "door" replaced with a flash unit. ...


1

No, this is not possible. A digital medium is not like a cassette tape. If you have a double exposure, there must be some other explanation. Maybe your camera has this function which you activated inadvertently.


1

Yes if you are saving the file or exporting it the EXIF will reflect that. EXIF changes are easy to detect if one is comparing a file to the original, but keep in mind this can typically be easily faked or manipulated if desired. Open up a file before and after with ExifTool and you'll be able to tell exactly what the Preview app changes. We have lots of ...


1

Currently, without having a rich experience in retouching there is probably very little chance you'd be able to tell. Even RAW files are, in a very basic sense editable. Here are some hints: If you're looking at fashion photography, always be mindful of skin texture. Bad retouchers (trying to please clients) generally destroy skin texture but often forget ...


1

Harry Farid http://www.cs.dartmouth.edu/farid/ is a professor at Dartmouth who has done a lot of work in this area and also maintains a compilation of the work of others in the field. There an quite a number of ways of detecting a manipulated image. For jpegs, the easiest way by far is to upload the image to the verification tool he has on his site :)



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