I've tried the following syntax:
[[folder/figure.svg]]
along with org-export-as-html
.
This apparently does not work - just adds a reference ... in the html file.
I had to test this a couple times to clarify exactly what the issue appeared to be. The image exports successfully when I use the following link:
Current folder is ~/test/
[[./img/Bitmap.svg]]
[[./Bitmap.svg]]
[[~/test/Bitmap.svg]]
However it fails with:
Current folder is ~/test/
[[img/Bitmap.svg]]
[[Bitmap.svg]]
I suspect it is that Org has to find where on the path the image is, the ./
tells it to look from current location, while ~/
can be properly expanded by the shell to give the current directory.
If you prefix ./
to your images they should export correctly.