Re: DateTime and DateTimeOriginal??

["Bengt Thuree" <bengt thuree com>]

Thanks
Crystal clear :)

/Bengt
On To, 2005-08-18, 02:16 am, Larry Ewing skrev:
>>From the exif 2.2 spec
>
>         DateTime
>         The date and time of image creation. In this standard it is the
>         date and time the file was changed.
>
>         DateTimeOriginal
>         The date and time when the original image data was generated.
>         For a DSC the date and time the picture was taken are recorded.
>
>         DateTimeDigitized
>         The date and time when the image was stored as digital data. If,
>         for example, an image was captured by DSC and at the same
>         time the file was recorded, then the DateTimeOriginal and
>         DateTimeDigitized will have the same contents.
>
> DateTime and DateTimeOriginal should be different if the image has ever
> been edited.  Perhaps you were confused since in Most cases
> DateTimeOriginal and DateTimeDigitized will be the same.
> DateTimeDigitized is meant to be used to mark the Time Film was scanned
> into a digital form, if the image started out in digital form it should
> be the same as DateTimeOriginal
>
> I very intentionally change DateTime each time the file is modified in
> F-Spot.
>
> --Larry
>
> On Wed, 2005-08-17 at 23:10 +0900, Bengt Thuree wrote:
>> Hej
>>
>> I saw somewhere that the DateTime and DateTimeOriginal should be equal
>> in
>> the EXIF 2.1 tags.
>>
>> But the DateTimeDigitized could be different.
>>
>> Is this true?
>>
>> Since I found the following in JpegFile.cs which indicates that the
>> DateTime will be reset to the last time the EXIF data was modified.
>>
>> // set the write time in the datetime tag
>> image_content.GetEntry (Exif.Tag.DateTime).Reset ();
>>
>> /Bengt
>>
>
>
>


-- 
Bengt Thuree   bengt thuree com    www.thuree.com/bt