Canon MX520 series, Online Manual

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Data Formats
You can select a data format when saving scanned images. You should specify the most suitable data
format according to how you want to use the image on which application.
Available data formats vary by application and operating system (Windows or Mac OS).
See below for the characteristics of each image data format.
PNG (Standard File Extension: .png)
A data format often used on websites.
PNG is suitable for editing saved images.
JPEG (Standard File Extension: .jpg)
A data format often used on websites and for digital camera images.
JPEG features high compression rates. JPEG images slightly degrade every time they are saved, and
cannot be returned to their original state.
JPEG is not available for black and white images.
TIFF (Standard File Extension: .tif)
A data format featuring a relatively high compatibility between various computers and applications.
TIFF is suitable for editing saved images.
Note
Some TIFF files are incompatible.
IJ Scan Utility supports the following TIFF file formats.
Uncompressed, black and white binary
Uncompressed, RGB (8 bits per channel)
Uncompressed, Grayscale
PDF (Standard File Extension: .pdf)
A data format for electronic documents, developed by Adobe Systems Incorporated.
It can be used on various computers and operating systems, and fonts can be embedded as well;
therefore, people in different environments can exchange the files without being aware of the differences.