This icon on the Image bar opens the Image Filter bar, where you can use various filters on the selected picture.
Inverts the colour values of a colour image, or the brightness values of a greyscale image. Apply the filter again to revert the effect.
Softens or blurs the image by applying a low pass filter.
Sharpens the image by applying a high pass filter.
Removes noise by applying a median filter.
Opens a dialog for defining solarization. Solarization refers to an effect that looks like what can happen when there is too much light during photo development. The colors become partly inverted.
Specifies the degree and type of solarization.
Specifies the degree of brightness, in percent, above which the pixels are to be solarised.
Specifies to also invert all pixels.
All pixels are set to their gray values, and then the green and blue color channels are reduced by the amount you specify. The red color channel is not changed.
Defines the intensity of ageing, in percent. At 0% you see the grey values of all pixels. At 100% only the red colour channel remains.
Opens a dialog to determine the number of poster colors. This effect is based on the reduction of the number of colors. It makes photos look like paintings.
Specifies the number of colours to which the image is to be reduced.
Converts an image to a pop-art format.
Displays the image as a charcoal sketch. The contours of the image are drawn in black, and the original colors are suppressed.
Displays a dialog for creating reliefs. You can choose the position of the imaginary light source that determines the type of shadow created, and how the graphic image looks in relief.
Specifies the light source position. A dot represents the light source.
Joins small groups of pixels into rectangular areas of the same color. The larger the individual rectangles are, the fewer details the graphic image has.
Determines the number of pixels to be joined into rectangles.
Defines the width of the individual tiles.
Defines the height of the individual tiles.
Enhances, or sharpens, the edges of the object.