Image compression settings

When scanning to PDF with Nitro Pro 7, the type of compression used—color, grayscale, or monochrome—is determined by the output setting you select in your default scanning software. Therefore, if you intend to do a color scan, you do not need to modify the monochrome settings as they will not affect your image.

Image compression options

Color/Grayscale

• JPEG: The main Joint Photographic Experts Group standard achieves 10:1 compression ratios with little perceptible quality loss
• JPEG2000: Achieves higher compression ratios than JPEG, and uses both lossy and lossless compression in the same file stream

• ZIP: Uses the ZIP compression algorithm to reduce the image size without affecting quality

Monochrome

• CCITT Group 4: A fax document transmission standard which uses advanced compression methods for lossless reproduction
• CCITT Group 3: The Group 3 standard achieves less compression, and is less advanced than the CCITT Group 4 method
• Run Length: Particularly effective on files that contain many long runs of the same bit, value, or character. This method is primarily used on binary files
• ZIP: Uses the ZIP compression algorithm to reduce the image size without affecting quality

Quality

• 150DPI: Might be suitable for use on the web due to the smaller file size produced, however will not produce high quality prints
• 200DPI: Suitable for higher quality viewing on computer monitors
• 300DPI: The standard generally used for office quality prints, and generates slightly larger file sizes
• 600DPI: Generates large file sizes, however it is recommended for high print quality of the image