I would take a pdf file of the image and import that into Artcam or Vectric and generate the g-code in that program.
With that amount of data I would be more worried about the g-code file size being too large, using the above programs would make that g-code size manageable. Just my 2 cents.
I have had numerous project where I have had to separate the g-code file into multiple cuts. Easel is a great little program but has its limitations and this is one of them, I’m not technical enough to tell you what is going on, but I have had nothing but problems with any file size over 5M, bear in mind though that is a lot of code.
There are some posts on the file size issues in the forum if you do a search.
That’s a pretty low resolution image. You’d have to spend a lot of time editing/recreating the image to get anything usable for engraving with an endmill. I can’t imagine how long it would take to carve something like that and as @anon68752607 said, keep that authentic look.