Visioneer 6400, 6200 manual About Jpeg Compression

34VISIONEER 6200/6400 SCANNER INSTALLATION GUIDE

Enable hardware compression (JPEG)—Click to make the JPEG compression options active.

Minimize Image Size (Maximum compression)—Select this option to produce the smallest file size for the image; image quality is lowest.

Best Image Quality—Select this option to produce the best quality image; file size is larger.

Custom Quality Factor—Set your own choice for file size and image quality. Enter a number in the Quality Factor box or drag the slider to set the Quality Factor. High means higher image quality and larger file size. Low means lower image quality but smaller file size.

Restore Defaults—Click to return the slider and Custom Quality

Factor to their original settings

7.Click OK.

The Configuration dialog box reappears. Make sure the configuration you just defined is selected.

8.Click OK on the Configuration dialog box.

The new configuration and its adjusted settings now apply to the button whose tab is selected at the top of the Configuration dialog box.

ABOUT JPEG COMPRESSION

Scanned graphics, photos, and other images can sometimes produce large files. The JPEG options for scanning reduce the file size by compressing the image electronically. But compression also reduces image quality. Therefore, compressing an image involves a trade-off between image quality and file size. In many cases, loss of quality due to compression is not readily apparent, but the amount of compression you select—if any—depends on the quality you want.