Grey lines appearing around some images in Indesign on export

[jasminecorbett]

Hello,

I am creating a report in Indesign and the inserted images look fine in the software. When I export to PDF interactive, some of them have strange grey lines appearing on some sides (see screenshots attached).

I can't figure out what is causing this, and have searched online with no luck.

Any insight would be hugely appreciated!

[Willi Adelberger]

This type of graphic should be iported as vectors, best as AI or PDF/X-4 files. The lines on top or on the left appear sometimes with raster images. I think this is a bug, but you can decrease the image frame or move the content a little bit to left and up to hide these lines.

[jasminecorbett]

Hello,

Thanks for your advice. Unfortunately I received these images externally from staff members and they can only send them as jpegs.
I tried cropping the image frame to hide the lines but they just kept appearing when I exported the file so I don't know what else to do?