IBM Ricoh FB750 - Manual (Page 64)

64
YCbCr format: Y contains the luminance (brightness) signal, Cb and Cr contain the chrominance (color)
information. See also YUV and RGB. YCbCr and YUV are linked via the following equations:
Y = 0.3 R + 0.59 G + 0.11 B
Cb = (U/2) + 0.5
Cr = (V/1.6) + 0.5
Zoom
Changing the view of an image without changing its actual size. Zoom is also the magnification factor for the
view.
File Formats
There are many different file formats both for graphics and for text. Each format has its own specific
qualities and can be viewed or edited only with software that supports it. Merely renaming a file and
changing its file extension (the three letters after the dot) won’t enable you to open the file as that type. The
formats included in this section are just a sampling of the many file formats available in different programs;
this is by no means a comprehensive listing.
AVI, Audio Video Interleaved
Full motion video format. File format developed by Microsoft for saving combined compressed video image
and sound information.
BMP, Bitmap
An uncompressed format, the bitmap can take up a large amount of disk space. Windows bitmaps are can be
used as Windows wallpaper if they are of the correct dimensions. Bitmaps can be edited and viewed with the
Windows Paint or Paintbrush application. This format is supported by all imaging software packaged with
your scanner.
CAD, Computer Aided Design
Designing and drawing, for example, machine parts or buildings with the help of computer graphics.
CUR, Cursor file format
Cursors are small image files that serve a specific function. These are the mouse pointers for Windows or
other operating systems. A cursor file from one operating system may not work on another.
DOC, Document format
Several programs use this as their file extension. This does not mean every DOC file is compatible with
every program that uses DOC. Some programs that use DOC include Microsoft Word, PageMaker,
WordPerfect, WordStar, Microsoft WordPad, and many others.
GIF, Graphic Image Format
This compressed format is commonly used to pass images from one person to another across the Internet.
Since the GIF format is not public domain and the owners of the format are beginning to charge royalties for
viewers and editors, it is losing ground as a “standard” format. A GIF can only support a certain range of
shades and so are not available for all images. GIF is available in many graphics programs.
ICO, Icon file format
Icons are small image files that serve a specific function. These images are commonly used to mark files and