Image Adjustment Option

The image manipulation processes in the image adjustment control panel are used to adjust image documents. By calculating or comparing each pixel against certain parameters colours may be adjusted. Of the six features currently available, Black and White (BW), Solarize, Invert and Grayscale enable you to directly manipulate your image document without defining any parameter. Saturation or Brightness, on the other hand, opens a dialog box that allows you to define the parameters before manipulation takes place.

Saturation

When you select Saturation on the control panel, a dialog [box] open by which you may define the saturation parameter. Three parameters enable you to adjust the Red, Green and Blue values of the image document, and a fourth enables you to adjust the Saturation value of your image document. All four parameters range from 100 to 100. You can define the value by using either the slider control, the edit box or the spin control button.

 Saturation dialog box

 The Red value and Saturation has been set to 50.

Brightness

When you select Brightness on the control panel, a dialog opens to define the brightness parameter. Value is measured from 0%, which means there is no change, to 100% which means complete brightness adjustment to your image document. You can adjust the brightness value by using either the slider control or the edit box.

 The brightness value is set on 75%

Black and White

 When you click Black and White on the control panel, your image document is converted to a Black and White image document.

Black and White applied to an image document

Invert

Clicking Invert on the control panel, inverts the colour of your image document.

Invert applied to the image document

Grayscale

Clicking Grayscale on the control panel scales and reduces the colour of your image document to gray colour ranges.

Grayscale applied to the image document

Solarize

Clicking Solarize on the control panel inverts the colour of your image document with the solarize parameter creating a solarize effect.

Solarize applied to an image document