Hello to all!
Can anyone help me out on what the artifact problem is in these type of photo?
please read first the explanation of the rejection "Artefakte" in the Contributer user guide:
You have photographed with a smartphone (Samsung Galaxy S8) and in general such a device can't handle such high contrast ranges as prevailing in your pictures, technically not without image errors as e.g. a single lens reflex camera can. You should consider that.
In all your pictures you can already see a noise and artifacts despite the low resolution posted here, I mean.
These technical errors on the smartphone are exacerbated by excessive image processing, which has led to the rejection of the images.
On the internet you will find a lot of information and picture examples concerning the topic noise and artifacts in pictures.
Adding to what v.poth said:
Which is why when zooming in these defects begin to show:
and therefore rejected based on this!