Cropping

Apache OpenOffice 4.1 Draw Guide

Editing Pictures (Raster Graphics)

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• Introduction
• Importing Raster and Vector Graphics
  • Link or Embed?
  • Scanning
  • Pasting from the Clipboard
  • Dragging and Dropping
  • Inserting from a File
• Exporting Graphics
  • Exporting the Entire File
  • Exporting Single Objects
  • Exporting as a Vector Graphic
  • Exporting as a Raster Graphic
• Modifying Raster Object Properties
• The Picture (Editing) Toolbar and Graphic Pane
• Cropping
• The Graphic Filter Toolbar
• Changing Colors Using the Color Replacer
  • Practical Example: Changing Wrong Colors to Transparency
  • Effect of the Tolerance Parameter
  • Color Depth
    • Reducing color depth
• Conversion
  • Convert to a Contoured Image
  • Convert to a Polygon
    • Number of Colors
    • Point Reduction
    • Fill Holes
  • Convert to Bitmap
• Print Options with Raster Graphics

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Cropping

Figure 129: The Crop dialog

More control and accuracy over cropping functions are available via the Format menu. Click Format → Crop Picture, and the dialog box in Figure 129 will appear. The fields Left, Right, Top, and Bottom specify the amount to trim from the appropriate edge.

In addition to cropping, you can enlarge or reduce the graphic's size by changing the percentage scaling values. The new dimensions of the graphic are shown in the Image Size width and height boxes, which can also be directly adjusted.

In Figure 129, you can see that 2 cm from the left side and 1 cm from the top, bottom, and right side will be trimmed from the original object. The preview pane shows the location of the new edges of the graphic. In addition, both height and width have been scaled down by 28%.

• If you choose Keep Scale, the graphic will be cropped to the scales shown in the width and height boxes, and the picture will be reduced in size accordingly.
• If you choose Keep image size, the graphic will be cropped and then enlarged to the original image size.

Take care with these operations; in the Crop dialog, the width and height are treated as totally independent values. Changing one without the other can result in significant image distortion. In that vein, be aware that the Position and Size dialog in the context menu has an option to keep the width-to-height ratio fixed while changing one of the two dimensions. Changing values in one area (Scale or Image Size) will be reflected in the other area.

Changes made in the Crop dialog affect only the view of the picture. The original picture is not changed. To export a cropped graphic, you must use File → Export. If you use the option Save as Picture from the context menu, the changes are not exported.