Filter tab

This tab is used to control the infrared cleaning, restore colors, grain reduction, sharpening, and size reduction options.

Infrared clean

Use this option to remove dust spots and scratches. It's only available when an infrared channel is available. This option only causes image softening in the immediate vicinity of dust spots and scratches.

Restore colors

This option is used to restore the red, green, and blue colors by transforming the colors to make them more independant. This works best when scanning at high resolution, and only effects the scan (not the preview).

If this option is used, the film type in the Color tab isn't used.

Grain reduction

Use this option to reduce the graininess of a scan. You can control the amount of softening of the image by choosing the Light, Medium or Heavy options.

Sharpen

This option enables a 3x3 sharpening filter. It's applied last, after all the color correction is done.

Size reduction

You can usually improve image quality by scanning at high resolution and then using this option to reduce the size of the crop tif file. For instance, reducing by a factor of 3 will reduce the height and width of the output files to 1/3 of the value from the raw scan, and the file will be 1/9 as large. Each pixel in the output file will be the average of every 3x3 group of raw pixels, which will significantly reduce the image noise.