CAD/CAM Viewing. Atalasoft DotImage CAD Reader can be used to read AutoCAD DWG and DXF formats using the Microsoft .NET Framework. DWG is the default format of AutoCAD. DXF is meant to be an interchange format for AutoCAD and Autodesk publishes a specification document for it. The DotImage CAD Reader integrates with DotImage seamlessly and reads CAD drawings as rasterized images which can be viewed, processed, and converted into other formats by DotImage. DotImage CAD Reader is runtime royalty free for desktop deployments.