By default, PDFCreator sets the quality of images in JPEG format at 75%. This can produce a less than desired effect when viewed. To increase the quality level of your image so that it better resembles the original JPEG, follow these instructions:
1. Open PDFCreator (Go to the Start button, click All Programs, expand the PDFCreator folder and select PDFCreator).
2. Click Printer and select Options.
3. On the left side, under Formats, click JPEG.
4. Under settings, input the desired quality level in the Quality textbox.
5. Click the Save button.
Note: Increasing the JPEG quality will increase the file size of the generated PDF.