The simple answer is no it's not possible for AutoCAD to automatically detect any curves. The reason is that a raster(bitmap) is a series of pixels (dots) and as such a curve will also be a series of dots and not a true curve.
There is some software that attempts to convert these dots to...
Hi there
Export as a different file format supported by Photoshop.
Some objects are unrepresentable in PostScript, for example, extruded objects, in which case they're output as vectors. AutoCAD objects that cannot be directly represented in PostScript are always exported as wireframe images...
