OpenOffice.org OpenOffice - 3.0 User's Guide download pdf (Page 96)

select Edit > Undo: Bitmap Graphic Filter from the menu bar or

press

Control+Z

Table 1 describes briefly each of the available graphic filters and their

effects. See the

Draw Guide

for examples of the effects.

Table 1: Graphic filters and their effects

Icon Name Effect

Invert Inverts the color values of a color image, or the

brightness values of a grayscale image.

Smooth Softens the contrast of an image.

Sharpen Increases the contrast of an image.

Remove

noise

Removes single pixels from an image.

Solarizati

Mimics the effects of too much light in a picture. A

further dialog box opens to adjust the parameters.

Aging Simulates the effects of time on a picture. Can be

applied several times. A further dialog box will open

to adjust the aging level.

Posterize Makes a picture appear like a painting by reducing

the number of colors used.

Pop Art Modifies the picture dramatically.

Charcoal Displays the image as a charcoal sketch.

Relief A dialog box is displayed to adjust the light source

that on turn will create the shadow and hence the

relief effect.

Mosaic Joins groups of pixels into a single area of one color.

Changing the Graphics mode

Use the next box in the Picture toolbar to change the mode of the

image. Choose between:

• Default: no changes to the graphic object.

• Grayscale: the image is converted to scales of gray.

• Black/White: each pixel of the image is converted to black or

white depending on the brightness value.

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OpenOffice.org OpenOffice - 3.0 User's Guide Page 96