The Conversion Summary dialogue appears when you run a vectorization or OCR.
This dialogue will inform you about the progress of your conversion.
Scan2CAD will analyze your image during conversion and inform you if it has identified potential issues with your image making it less likely to achieve good conversion results.
For example; the Conversion Summary might inform you that the image has too many colors or speckles. In this case you can cancel the conversion, and return to Scan2CAD’s Raster Effects to clean the image and convert again with a more suitable image.