I have my paper back from a reviewer. The main point is that a quality of the image is not good enough for the publication. I reproduced this image from another paper (with permission) but the only thing I could do, was a print screen of the original and paste into graphical software. I improved the quality by smoothing, but it is still not good enough for the publisher.
The reviewer comment:
The quality of the figures 1 and 2 is still not good. I recommend authors convert the schematics into vector graphics.
I can't find what and how to do it. Did you have a similar problem and solved it?
EDIT to explain what is on the figure: The figure shows elements of a vehicle with dimensions (numbers), different coordinate systems, force... it is rather complicated and maybe I could redraw the arrows (alhough many of them) but the background is a photo of the element.