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OpenOffice Calc User Guide
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Filter

Clicking on the drop down arrow next to the Filter icon displays the toolbar shown in Figure 94.

Frame54

Table 3: Picture filter toolbar buttons

Button

Purpose

Invert

Inverts the colors in the picture like a negative.

Smooth

Softens the contrast in an image.

Sharpen

Increases the contrast in an image.

Remove Noise

Removes single pixels from an image.

Pop Art

Converts any image to a pop-art format.

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.

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.

Relief

Displays a dialog for creating reliefs. The position of the imaginary light source that determines the type of shadow can be chosen.

Aging

Makes a photo appear aged. The higher the aging degree, the older the picture will look.

Charcoal Sketch

Displays the image as a charcoal sketch. The contours of the image are drawn in black, and the original colors are suppressed. This function can be applied to the whole image or to a part of it.

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.



OpenOffice Calc User Guide
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