Difference between revisions of "Documentation/OOo3 User Guides/Writer Guide/Modifying an image"

Revision as of 09:00, 13 January 2009

When you insert a new image, you may need to modify it to make it more suitable for fitting into the document. The placement of the picture relative to the text is discussed in Positioning graphics within the text. This section describes the use of the Picture toolbar, resizing, and cropping, as well as a workaround to rotate a picture.

Template:Documentation/Note

Using the picture toolbar

When you insert a suitable graphic image or select one already present in the document, the Picture toolbar appears. This toolbar can be either floating or docked. The figure below shows what the Picture toolbar looks like when it is floating. Two other toolbars can be opened from this one: the Graphic Filter toolbar, which can be torn off and placed elsewhere on the window, and the Color toolbar, which opens as a separate floating toolbar.

From these toolbars, you can apply small corrections to the graphic or obtain special effects.

1 From File | 2 Filter | 3 Graphics mode | 4 Color | 5 Transparency | 6 Flip Horizontally | 7 Flip Vertically | 8 Graphics Properties | 9 Invert | 10 Smooth | 11 Solarization | 12 Aging | 13 Charcoal Sketch | 14 Relief | 15 Mosaic | 16 Posterize | 17 Pop Art | 18 Sharpen | 19 Remove Noise | 20 Red | 21 Green | 22 Blue | 23 Brightness | 24 Contrast | 25 Gamma

(Above) Picture toolbar plus tear-off Graphic Filter toolbar and floating Color toolbar. Graphics mode (3) can be Default, Grayscale, Black/White, or Watermark.

Filters

Table 2 provides a short description of the available filters, however the best way to understand them is to see them in action. Feel free to experiment with the different filters and filters settings. remembering that you can undo all the changes by pressing Ctrl+Z or Alt+Backspace or by selecting Edit > Undo.

The figure below shows examples of some of the changes available on the Picture toolbar.

Original Image	Flipped Vertically	Flipped Horizontally	Light 50%
Contrast 50%	Red 50%	Green 50%	Blue 50%

Some graphic effects available from the Picture toolbar.

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.
	Solarization	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 opens 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 will create the shadow and, hence, the relief effect.
	Mosaic	Joins groups of pixels into a single area of one color.

Color

Use this dialog box to modify the individual RGB color components of the image (red, green, blue) as well as the brightness, contrast, and gamma of the image. If the result is not satisfactory, you can press Control+Z to restore the default values.

Setting the object transparency

Modify the percentage value in the Transparency box on the Picture toolbar to make the image more transparent. This is particularly useful when creating a watermark or when wrapping the image in the background.

Using the formatting toolbar and picture dialog

When an image is selected, you can customize some aspects of its appearance using the tools available on the Formatting toolbar as well as in the dialog that is shown by right-clicking on the image and selecting Picture. You can, for example, create a border around the image, selecting style and color; or you can (in the Borders page of the Picture dialog) add a shadow to the image.