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From: Jolly Roger <jollyroger@pobox.com>
Newsgroups: comp.sys.mac.system
Subject: Re: Any quick, easy way to compare two images?
Date: 26 Jan 2014 02:57:42 GMT
Organization: People for the Ethical Treatment of Pirates
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On 2014-01-26, Savageduck <savageduck1@{REMOVESPAM}me.com> wrote:
> On 2014-01-26 00:42:36 +0000, nospam <nospam@nospam.invalid> said:
>
>> In article <2014012515592033890-savageduck1@REMOVESPAMmecom>,
>> Savageduck <savageduck1@{REMOVESPAM}me.com> wrote:
>> 
>>> Then regarding the concept of creation date; I have thousands of RAW &
>>> JPEG image files, the date and time i tripped the shutter to capture
>>> the image as an NEF or JPEG is recorded in the EXIF metadata as the
>>> "Create Date". No matter how many times, or when I copy one of those
>>> files, the "Create date & time" remains unchanged. However, the
>>> metadata contains a "Modify Date" field and that will reflect the date
>>> and time any such modification is made.
>> 
>> that's an exif tag *in* the file, not metadata within the file system.
>
> I'm sorry! I think like a photographer, and for me the meaningful 
> metadata is the EXIF & XMP data.
>
>> there's also a very high likelihood that the webcam he is using does
>> not write exif tags to the images it creates.
>
> Highly likely, so he should consider buying something which does a better job.

Some network cameras don't bother to add EXIF metadata to captured
images. Unless I missed it, the OP has not stated whether or not these
images contain EXIF metadata. Solutions that rely on EXIF metadata may
not be sufficient solutions to solve his problem.

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JR