This filter is found in
This tool offers you a collection of unified filters to treat the image. Of course, same functions can be performed by particular filters, but you have here an interesting, intuitive, overview.
Two previews display respectively before treatment and after treatment images.
Show sets what you want to preview:
Entire image
Selection only: if selection exists.
Selection in context: the selection within the image.
Affected Range allows you to set which brightness you want to work with.
Shadows: dark tones.
Midtones
Highlights: bright tones
Determines what HSV channel the selected range will affect. You can choose between:
Hue
Saturation
Value
This slider sets how image will change when you click on a window: taking a short step or a large one (0 - 1).
You can choose between:
Hue makes one preview for each color appear. By clicking successively on a color, you add to this color into the affected range, according to Roughness. To substract color, click on the opposite color.
Saturation: Three previews for more or less saturation.
Value: Three previews for more or less luminosity.
Advanced: developped later.
Advanced Options
Something like a zoom on previews. Normal size is 80.
This relates to the transition between tones. When the slider is set to zero, curve is rectangular and transition is abrupt. Small triangles are used to locate transitions between tones.
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Tip |
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In spite of Preview Size option, this size is often too small. You can compensate this by working on an enlarged selection, for instance a face on a photo. Then, you invert selection to work on the other part of the image. |