If I understand what you are saying, you would like a new field that displayed an image and allowed that image to be annotated (by drawing on the image or an overlay to the image) to call out or highlight certain portions of the image.
If so, that would certainly be an enormously useful addition to Machform. It would allow us to replace some forms we currently use that require a file upload (annotated diagram or photo) with a simple form submission. I would love to see it added, but I don't think it is likely to appear any time soon,
If we could superimpose multiple choice buttons or check boxes on an image as well, that would be fantastic. (I might as well ask for the whole solar system if I already asking for the moon. )