are there PDF conversion settings?

[LarryO]

It is frequently desirable to import a PDF to use as a background for locating our work in a building.

For reasons of liability and clutter we find it to be a good practice to remove all referencing and architectural items (millwork, furniture, hatching).

Are there any settings which can improve the quality of the image created when ungrouping the pdf. I find that there is significant degradation between before and after ungrouping. Low dpi and spray artifacts possibly from anti-aliasing are introduced. Alternately the line work extracted from the pdf loses its differentiating qualities that could have been utilized efficiently to delete clutter, etc.

 

Are there settings somewhere which can be utilized to reduce information and quality loss during PDF conversions?