Color Negative

This transformation lets you convert an image of a color negative to a color positive. It is primarily useful when you have scanned a color negative and your scanner software does not support conversion of color negatives to positives.

Amount

The amount control lets you control how much of the color negative transformation is applied to the input image. You can apply a percentage of the transformation to the entire image, or you can specify an amount mask to restrict the effects of the transformation to only part of the input image. For this transformation, the Amount control should normally be left at 100%.

Black Point

This color control lets you select the color in the input image that corresponds to pure black. Generally, the best way to set this is to scan a little of the film outside the image frame and use this as a reference black. This color is usually a muddy orange. Picture Window initially sets the black point to its best guess based on analyzing the input image; you can reset the black point color to this automatic guess by clicking the Auto Black button.

White Point

This color control lets you select the color in the input image that corresponds to pure white. This is usually the darkest part of the input image. Picture Window initially sets the white point to its best guess based on analyzing the input image; you can reset the white point color to this automatic guess by clicking the Auto White button.

Saturation

This slider control lets you increase or decrease the saturation of the image.

Red/Green/Blue Gamma

These sliders let you adjust the overall color balance and brightness of the image.

Dynamic Range

This dynamic range slider lets you compress the range of the image by reducing the maximum white or increasing the minimum black. The white slider adjusts the highlights; the black slider adjusts the shadows.