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7. The Menus / 7.6 The Tool Menu

### 7.6.10 Color/Color To Transparency

Color To Transparency creates transparency for an image based on a predefined color. It also removes this color from semi-transparent areas, so that the result can be better placed on a different background.

- Simple Calculation
Simple Calculation is mainly intended for images on a very homogeneous background, usually white or black. If Filter Saturation is active, the difference between the saturation of the color and the image will influence the result.
- Color Similarity
Color Similarity is used, if the background color has larger differences. This is the case e.g. with typical greenscreen shots. Hue Tolerance determines how strong the color tone of the image may deviate from the set color. In addition, the effect of differences in saturation and in brightness is adjustable.

The histogram shows the distribution of the calculated transparency. It can also be used to improve the result.