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Sharpen increases the contrast between neighboring pixels, emphasizing
the brightness difference. This will accentuate the outlines. The effect will
be strengthened if you apply the filter several times in a row.
Remove noise compares every pixel with its neighbors and replaces the
extreme values (those that deviate in color by a large amount from a mean
value) by a pixel with a mean color value. The amount of picture
information does not increase, but because there are fewer contrast
changes our brains can better recognize the resulting graphic. This filter
tends to make the picture also a little more smooth.
Solarization was originally a photochemical effect. If the location of a
photograph is extremely highly lit, you can experience a reversal of color
and brightness. Similarly, entry of light during the developing process
reverses the brightness values. These phenomena were used for artistic
production of pictures.
With this filter you input a threshold brightness value, above which the
color values are reversed (middle picture, threshold value 70%). With the
Invert option the whole of the resulting picture is inverted in color (right
picture).
Chapter 6 Editing Pictures (Raster Graphics) 99
- OpenOffice.org 3 1
- Draw Guide 1
- Copyright 2
- Contents 3
- Note for Mac users 6
- Chapter 1 7
- Introducing Draw 7
- The Draw workplace 8
- Chapter 1 Introducing Draw 9 9
- Status bar 10
- Toolbars 11
- Standard toolbar 12
- Drawing toolbar 12
- Line and Filling toolbar 12
- Text Formatting toolbar 13
- Color bar 13
- Options toolbar 14
- Drawing grid and guides 15
- Floating and moving toolbars 15
- Quick printing 17
- Controlling printing 18
- Selecting pages to print 19
- Printing a brochure 20
- Exporting to PDF 22
- Exporting to other formats 22
- E-mailing documents 23
- Chapter 2 24
- Drawing Basic Shapes 24
- Creating simple drawings 25
- Custom shapes 25
- Drawing basic shapes 25
- Drawing a straight line 26
- Drawing an arrow 27
- Drawing lines and arrows 27
- Drawing a rectangle or square 28
- • Polygon 45 31
- Gluepoints 32
- Connectors 32
- Drawing geometric shapes 33
- Basic shapes 34
- Symbol shapes 34
- Block arrows 34
- Adding text to objects 35
- Text input – properties 36
- Text input 37
- Chapter 3 38
- Working with Objects 38
- Introduction 39
- Changing the selection mode 40
- Selecting objects 40
- Selecting hidden objects 40
- Arranging objects 41
- Dynamic movement of objects 42
- Modifying an arc 43
- Rotating 44
- Position and Size 46
- Rotating objects 47
- Slant and corner radius 47
- Editing object points 48
- How curves work 49
- The three kinds of tangent 50
- Examples 50
- ➋) and notice that the 52
- Chapter 4 55
- Changing Object 55
- Attributes 55
- Toolbars and menus 56
- Editing lines and borders 57
- Common line properties 58
- Drawing arrows 59
- Line shadows 60
- Customizing arrow styles 61
- Figure 78: Arrow style list 62
- Common fill properties 63
- Fill with a gradient 64
- Fill with a line pattern 64
- Fill with an image 64
- Adding a shadow to an area 65
- Advanced area fill options 65
- Creating your own gradient 66
- Creating your own bitmap fill 68
- Customizing shadows 69
- Adding transparency 70
- Using styles 71
- Special effects 72
- Flip an object 73
- Mirror copies 73
- Distorting an image 74
- Set to circle (slant) 75
- Dynamic gradients 76
- Chapter 5 78
- Combining Multiple 78
- Grouping objects 79
- Combining objects 80
- Connecting lines 81
- Subtract 82
- Intersect 82
- Practical example 82
- Aids for positioning objects 83
- 3 Send Backward 7 Reverse 84
- 4 Send to Back 84
- Aligning objects 85
- Chapter 6 88
- Editing Pictures 88
- (Raster Graphics) 88
- To link or to embed? 90
- Scanning 90
- Pasting from the clipboard 91
- Dragging and dropping 91
- Inserting from a file 91
- Exporting graphics 92
- Exporting single objects 93
- Exporting as a vector graphic 93
- Exporting as a raster graphic 93
- The picture (editing) toolbar 95
- Cropping 97
- The graphic filter toolbar 98
- Color depth 103
- Conversion 105
- Number of colors 106
- Point reduction 106
- Fill holes 106
- Convert to bitmap 109
- Chapter 7 111
- Working with 3D Objects 111
- Creating 3D objects 112
- 3D scenes 114
- Producing 3D shapes 114
- Variation 5: Fontwork 115
- Editing 3D objects 116
- 3D settings for 3D bodies 117
- 3D Effects - Geometry 119
- 3D Effects - Shading 123
- 3D Effects - Illumination 126
- 3D Effects - Textures 128
- OpenOffice.org 130
- 3D settings for 3D shapes 132
- Chapter 8 138
- Tips and Tricks 138
- Positioning objects with zoom 139
- The Zoom toolbar 140
- Snap to grid 141
- Snap to page edge 144
- Snap to object border 145
- Snap to object points 145
- Drawing to scale 146
- Using the Pages area 151
- Using page backgrounds 151
- Creating a page background 152
- Creating cool effects 157
- Cross-fading 158
- Chapter 9 159
- Organization Charts, Flow 159
- Diagrams, and More 159
- Drawing an organization chart 160
- Drawing a flow diagram 162
- Figure 204: The Flowchart 163
- Glue points and connectors 164
- Drawing connectors—basics 165
- Editing glue points 166
- Adding text to connectors 168
- Chapter 10 171
- Advanced Draw 171
- Techniques 171
- Setting glue points 174
- Start point Length 176
- Dimensioning a drawing 180
- Dimensioning objects 181
- Editing dimension lines 182
- Working with text in Draw 183
- Anchoring text 184
- Fitting text in frames 186
- Fit to frame: 187
- Adjust to contour: 187
- Text frames and callouts 188
- All options off 189
- Fit width to text 189
- Fit to frame 189
- Fit height to text 190
- Fontwork Gallery 191
- Writer OLE object 193
- Object mode 194
- Guide to Bézier curves 195
- Transition points 198
- Closing the curve 199
- Freehand lines 200
- Adding comments to a drawing 201
- Connecting and breaking lines 202
- Index 203 203
- Index 205 205
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