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DPChallenge Forums >> Tips, Tricks, and Q&A >> Need to know what is considered okay for dp proof
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01/15/2006 01:50:31 PM · #1
This has been asked before, but my question seems to not have been addressed. When I save my images direct from the camera to disk, it keeps all the pertinent information, but does not show the following information: EXIF.dat. That is not appearing on the summary. It only shows up when I transfer the images into an album under HP Image zone directly on the hard drive. That is just too many files to save. I don't have enough space. Is it necessary to have the word EXIF.dat on the file when sending proof?It has the camera model, the day, the file size, aperture, metering info, focal length, everything that is required, including original file size, just not exif.dat.
01/15/2006 01:59:15 PM · #2
exif data is needed, embedded in the image for DPC.
Otherwise, you can change it.

Message edited by author 2006-01-15 14:00:30.
01/15/2006 02:01:33 PM · #3
the EXIF information should be included in the metadata in the original image, it does not need to be included in a seperate file, so just keep the original.

to see if the metadata includes EXIF information, just open the orginal in photoshop, but make sure there isn't any .dat file with the same name as the image available, then go to File/File info, there you should see the EXIF info, if you do, then keeping the original is enough.
01/15/2006 02:03:08 PM · #4
What we need is the the exact image file that came off your memory card. Ideally you should copy this through your operating system, and not using any transfer software that may alter the file.

The EXIF data is embedded in that file, and is not a separate file.

~Terry
01/15/2006 02:10:28 PM · #5
Thankyou. I did look at the file info, and on the disk copy it does show exif info as 2.2 I was never sure how to see that. I think I am okay. Thankyou all for your help.
01/15/2006 02:50:33 PM · #6
Originally posted by ClubJuggle:

What we need is the the exact image file that came off your memory card. Ideally you should copy this through your operating system, and not using any transfer software that may alter the file.

The EXIF data is embedded in that file, and is not a separate file.

~Terry


Why, exactly, is the EXIF data required? I'm honestly curious about this. Given that you require the original photo as it came off the camera, and EXIF data, this precludes a large number of cameras, which admittedly probably is not an issue, but could be for a segment of people that are just here to have fun and have older, cheaper, or other cameras.

The data can be easily manipulated, so it seems as if there is no additional protection beyond a person claiming that the picture is valid, unless it is just a ``to keep honest people honest'' thing. Moreover, what fields are required? Does the picture only need to *have* EXIF data, even if it does not contain any actual informaiton?
01/15/2006 05:00:27 PM · #7
Originally posted by m:

Originally posted by ClubJuggle:

What we need is the the exact image file that came off your memory card. Ideally you should copy this through your operating system, and not using any transfer software that may alter the file.

The EXIF data is embedded in that file, and is not a separate file.

~Terry


Why, exactly, is the EXIF data required? I'm honestly curious about this. Given that you require the original photo as it came off the camera, and EXIF data, this precludes a large number of cameras, which admittedly probably is not an issue, but could be for a segment of people that are just here to have fun and have older, cheaper, or other cameras.

The data can be easily manipulated, so it seems as if there is no additional protection beyond a person claiming that the picture is valid, unless it is just a ``to keep honest people honest'' thing. Moreover, what fields are required? Does the picture only need to *have* EXIF data, even if it does not contain any actual informaiton?

A few months ago (don't remember exact date) the ruling was changed to disallow any camera that didn't create exif data -- before that they were accepted. The change was a non-issue for everyone involved I believe -- I don't recall any of the gnashing of teeth that usually accompanies change around here anyway.

The exif is needed, as you say, 'to keep honest people honest' -- but beyond that it provides information about how the image was captured that can be compared to the image for inconsistencies (daytime exposure settings for a nighttime shot, for example). There are not 'required' exif fields, other than the exif data must be there. Although, the SC have no doubt become quite familiar with what exif is available from the more common cameras.

It is certainly possible to edit exif data direction, and there are many programs available to do just that -- however, most add additional information about the program doing the changing (part of the exif standard I believe). This would be a dead give-away. ;) While it would be possible to write a program to change only the exif data desired -- it's really more trouble than it's worth.

David
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