Print quality of the PDF document created by PDF Impress depends on the print resolution and on the image compression settings. PDF Impress 2013 supports print resolution up to 2400 DPI and multiple image compression formats (ZIP, JPEG, CCITT3, CCITT3(2D), CCITT4) with high, medium and low quality image compression methods.
Image Compression Options:
Image compression provides control over image fidelity in the output PDF document. There are few different types of compression you can use in PDF Impress:
ZIP: This method is good to use on images with large areas of single colors or repeating patterns. The ZIP method is lossless which means it will not affect image quality.
JPEG: This method is suitable for moderate sized grayscale and color images. JPEG is lossy, which means that it removes image data and may reduce image quality, but it attempts to do so with minimal loss. You can use the JPEG compression bellow to adjust the amount of compression used.
- Low quality means more compression (smaller file size).
- Medium quality means good balance between quality and file size. We recommend using this option unless you specifically require the smallest file size possible or preserve quality.
- High quality means less compression (larger file size).
CCITT3: Lossless compression method suitable for black and white images. Group 3 encoding was designed specifically for bi-level, black-and-white image data telecommunications.
CCITT3(2D): This is more advanced CCITT3 algorithm that achieves better compression ratio.
CCITT4: This is more efficient form of bi-level compression that has almost entirely replaced the use of Group 3 in many conventional document image storage systems. If you are not sure which CCITT compression use for black and white images, our recommendation is to use CCITT4
Other important options:
Make image grayscale: Enable this option to convert all images in created document to grayscale. This option may dramatically decrease the file size if your images are visually grayscale but are stored as color in your original document.
Make image negative: Sometimes your scanner or other input device can produce images that are negative. By enabling this option you can control conversion back into normal mode.
To learn more about PDF Impress features visit: http://www.binarynow.com/products/pdf-impress/features/
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