GroupDocs.Viewer Cloud enables you to adjust quality of output images contained by the source PDF document. To adjust image quality use PdfOptions.ImageQuality option.
PdfOptions.ImageQuality can be set to:
Low - The acceptable quality, best performance and least size of the output image. Medium - Better quality and slower performance. High - Best quality but slow performance. NOTE: this option is supported when rendering to HTML only.
Following code snippet shows how to adjust image quality when rendering to HTML...."grant_type=client_credentials&client_id= $CLIENT_ID &client_secret=...&client_secret= $CLIENT_SECRET " \ -H "Content-Type: application/x-www-form-urlencoded"...