ImageEn Forum - get/write exif dates and other dates

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get/write exif dates and other dates

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lorife

Italy
44 Posts

Posted - May 30 2023 : 05:44:23

Hello,

I need to get all the available dates of an image, then choose the minor one and set the exif date of image taken from a camera to the minor one.

How many dates are there, and how can I get them?

For example:
I tried these 3 but they are all empty:

Memo1.Lines.Add(io.Params.EXIF_DateTime);
Memo1.Lines.Add(io.Params.EXIF_DateTimeOriginal);
Memo1.Lines.Add(io.Params.EXIF_DateTimeDigitized);

I don't know if there are others, for example: creation date, modify date..

can you help me? also to set the new date

xequte

38615 Posts

Posted - May 30 2023 : 12:31:59

Hi

The EXIF dates will only be set for images from digital cameras and mobile phones. All files will have a creation and modify date:

http://www.imageen.com/help/IEGetFileDetails.html

Nigel
Xequte Software
www.imageen.com

lorife

Italy
44 Posts

Posted - May 30 2023 : 15:12:34

Hello,
thanks.
Is there a function to write those 3 dates?
Also, in your experience which is the field used by softwares to "see" that an image changed?
For example, if I rotate an image what field do you think that synology photos uses to reload the image in the cache because it changed?

xequte

38615 Posts

Posted - May 31 2023 : 02:16:53

Please see the example for writing those values at:

http://www.imageen.com/help/TIOParams.EXIF_HasEXIFData.html

To determine when an image has changed in another application, you should just check the File Change Date.

Nigel
Xequte Software
www.imageen.com

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