Image Filter Bar

This icon on the Image bar opens the Image Filter bar, where you can use various filters on the selected picture.

Invert

Inverts the color values of a color image, or the brightness values of a grayscale image. Apply the filter again to revert the effect.

Smooth

Softens or blurs the image by applying a low pass filter.

Sharpen

Sharpens the image by applying a high pass filter.

Remove Noise

Removes noise by applying a median filter.

Solarization

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.

Parameters

Specifies the degree and type of solarization.

Threshold Value

Specifies the degree of brightness, in percent, above which the pixels are to be solarized.

Invert

Specifies to also invert all pixels.

Aging

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.

Aging Degree

Defines the intensity of aging, in percent. At 0% you see the gray values of all pixels. At 100% only the red color channel remains.

Posterize

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.

Poster Colors

Specifies the number of colors to which the image is to be reduced.

Pop Art

Converts an image to a pop-art format.

Charcoal Sketch

Displays the image as a charcoal sketch. The contours of the image are drawn in black, and the original colors are suppressed.

Relief

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.

Light Source

Specifies the light source position. A dot represents the light source.

Mosaic

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.

Element resolution

Determines the number of pixels to be joined into rectangles.

Width

Defines the width of the individual tiles.

Height

Defines the height of the individual tiles.

Enhance edges

Enhances, or sharpens, the edges of the object.