The highest supported resolution is 3200 dpi and the lowest is 50 dpi.
Note: Please take caution when processing low-resolution pages!
If your image has low resolution (less than 300 dpi), make sure that the physical size of the page is correct. The A4 page size is 210 x 297 millimeters (this is 600 x 840 pixels for 72 dpi).
If your page is 2550 x 3300 pixel and it has 72 dpi resolution, then it means physical page size 0.9 m x 1.17 m. It's as large as 17 A4 pages, and processing it will decrease your license counter by 17 units. If your input images come with incorrect resolution, please use
PrepareImageMode.OverwriteResolution = true;
PrepareImageMode.XResolutionToOverwrite = CorrectValue;
PrepareImageMode.YResolutionToOverwrite = CorrectValue;