Pitney Bowes MapInfo Professional - Manual (Page 127)

• Use ROP Method to Display Transparent Raster - When the ROP method is selected, the transparent
image is rendered using a raster operation (ROP) to handle the transparent pixels. This method is
used to draw transparent (non-translucent) images on-screen.
• Export Raster In True Color When Possible - Select this check box to display your 24-bit raster or
grid file images in true color (make sure your display settings are set to greater than 256 colors). Clear
this check box to display images using 256 colors. This box is checked by default.
• Use Anti-Aliasing - Select this check box to apply the anti-aliasing options available in MapInfo
Professional. For a description of the anti-alias preferences, see Understanding the Anti-Aliasing
Export Preferences .
Understanding the Anti-Aliasing Export Preferences
To give you more control over map images when exporting MapInfo Professional maps, you can use
anti-aliasing methods. This is particularly important when you are saving maps created in MapInfo
Professional for use in other Windows-based applications, in particular in slide presentations or for web
pages.
The benefits of anti-aliasing can include:
• Make your fonts look smoother
• Make jagged edges in maps look rounder
• Can make text can be easier to read (for some) because it looks more like printed type
• Make maps look more visually attractive
You can choose to smooth images and text during the export process. You can use this capability with
all types of windows such as Map windows, layouts, legends, and graphs.
You cannot anti-alias images you are exporting to .EMF or .WMF format, because these are not
true raster formats. Note:
There are three smoothing options you can use to customize your raster image:
1. Smooth using a Filter value. You can set a flag that selects one of six filters that allow you to choose
the direction the filter is applied to the image from.
2. Smooth using a Mask value. You can select a value that indicates the size of the area you want to
smooth. For example, to create a 3x3 pixel mask value, you would enter a 3 in this field. This would
limit the amount of change in the color of the pixels. Typically mask sizes would be 2-3 pixels when
exporting at screen resolution. If you are exporting at a higher resolution, a larger mask might be
appropriate.
3. Smooth using a Threshold value. You can select a threshold value to indicate which pixels to smooth.
Each pixel in an image has a value based on its color. The smaller the pixel value, the darker the
color. Select this option to smooth all of the pixels above the threshold you enter in this field. When
you set this value to 0, MapInfo Professional will smooth all of the pixels.
You must either set a global preference for these anti-aliasing options or set them locally during the
export process (using the Advanced button).
For more information, see Recommendations for Effective Pattern Scaling in the Help System.
127 MapInfo Professional User Guide
Chapter 4: Configuring MapInfo Professional Preferences