Change capture time of a series of images

I need to change the capture time of several images. Since they are scans from dia, they report as the time of acquisition that of the scan and I would like to change it with a time that can be likely with the time with which the photo was taken. If there are few images I can proceed manually, but if I have to change the date of a series of 100 images it becomes very tiring. I would like to know if in the batch procedure it is possible to increase the time of the images following the first with a fixed interval, so that from the first to the last image there is a difference in elapsed time.

As far as I remember, you can also set the new time relative to the original time of the file. Thus getting a sequence relative to scanning time. Would this already be a solution? I have no idea, if there is a feature as you requested, I’m just on my phone and can’t look it up.
If you are familar with batch programming (Linux or Windows?) you may do it using exiftool, building up a filelist feom the target files and process the files one by one in a loop.

No, I have no programming experience. Then the images I am not scanning now so I could make sure to change the scan time. The images have been scanned over the years, so since I gave them the year and month they were developed, I wanted to use these dates to have a temporal order. The thing I miss the most is the ability to automatically increment the time between images in order to have a timeline.

The problem is solved. I had found a way to add the date with the function present in digikam, but I could not find how to increase the time automatically between one photo and the next. Looking good there is in the edit function given the possibility to insert a fixed time interval between one image and another.

The Time Adjust Tool has a time interval function in current digiKam versions. It does exactly what you are looking for.

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