7 Displaying Images
Image display has long been a specialty of IDL. Few other data analysis environments offer the flexibility of IDL when it comes to reading, manipulating, and displaying digital images. This chapter begins with a definition of the two image types that can be displayed in IDL: PseudoColor and TrueColor. The built-in procedures available for displaying images are described, followed by a discussion of image scaling techniques, including histogram clipping and equalization. The chapter continues with a description of how images may be resized and positioned to fit the display. Methods for displaying TrueColor images are described next, followed by specialized instructions for displaying images on the PostScript and Printer graphics ...
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