MATHEMATICA IMPORT/EXPORT 格式

TIFF (.tiff, .tif)

Registered MIME type: image/tiff
TIFF raster image format.
Commonly used in image manipulation applications, page layout applications, scanners and other imaging devices, and for the archiving of images.
Suitable for high-color-depth images.
TIFF is an acronym for Tagged Image File Format.
Binary format.
Supports multiple color resolutions, color encodings, color palettes, and compression methods.
Supports arbitrary bit depths of up to 16 bits per channel, and also 32 bits per channel.
Supports floating-point images with 32 and 64 bits per channel.
Can store multiple images.
Supports alpha channels.
Introduced in 1986 by Aldus.

Import and Export fully support the TIFF 6.0 specification.

IMPORT 与 EXPORT

Import imports a TIFF file, returning a single Image object or a list of images.

Export exports graphics or any other expression as an image to a TIFF file.

Export exports a list of graphics as a multi-image TIFF file.

Export["file.tiff", expr] creates a TIFF image with the same image size as the displayed form of expr.

When exporting Mathematica graphics or arbitrary expressions to TIFF, the resulting image has the same raster size as its displayed form.

Image objects are by default exported at their full raster size.

Because TIFF is a raster image format, all fonts are rasterized on export.

When exporting an image of type , , and , Export creates a 16-bit TIFF file by default. and images are exported to 8-bit TIFF files.

Import imports the specified element from a TIFF file.

Import imports a subelement.

Import imports multiple elements.

The import format can be specified with Import or Import.

Export creates a TIFF file by treating expr as specifying element elem.

Export treats each as specifying the corresponding .

Export exports expr with the specified option elements taken to have the specified values.

Export uses rules to specify the elements to be exported.

See the reference pages for full general information on Import and Export.

ImportString and ExportString support the TIFF format.

NOTEBOOK INTERFACE

In the notebook front end, Insert ► Picture and the Open menu allow import of a TIFF file into a cell.

Save Selection As exports the selected part of a notebook as a TIFF file.

参数

General Import elements:

	"Elements"	list of elements and options available in this file
	"Rules"	full list of rules for each element and option
	"Options"	list of rules for options, properties, and settings

Data representation elements:

	"Animation"	multi-image TIFF represented as an animation object
	"Graphics"	the first image in the file, given as graphics
	"GrayLevels"	array of normalized gray-level values
	"GraphicsList"	all images as a list of graphics
	"Image"	first image in the file, represented as an Image object
	"ImageList"	all images, given as a list of Image objects

Import by default uses for simple TIFF files and for multi-image TIFF files.

Import of a multi-image TIFF with element or gives the first image.

Export by default generates a multi-image TIFF if the expression supplied is a list of Graphics or Image objects.

Export with element or always generates a single-image TIFF.

Advanced Import elements:

	"Background"	background color shown in transparent image regions
	"BitDepth"	bits used to represent each color channel in the file
	"ColorSpace"	color encoding used in the file
	"ImageCount"	number of images in the file
	"ImageEncoding"	how images are compressed in the file
	"ImageResolution"	image resolution specified in the file
	"ImageSize"	raster dimensions

Data representation elements:

	"ColorMap"	color-reduction palette
	"Data"	array of pixel values
	"ImageSize"	overall image size
	"RawData"	array of color map indices
	"RGBColorArray"	array of RGBColor objects

Metadata elements:

	"Author"	creator name
	"CameraTopOrientation"	orientation of the camera when the picture was taken
	"Comments"	user comments
	"CopyrightNotice"	copyright information as a string
	"Device"	model specification of the camera or input device
	"DeviceManufacturer"	maker of the camera or input device
	"ImageCreationDate"	date and time the original picture was taken, given as a DateList specification

For multi-image TIFFs, the above data representation and metadata elements are taken to be lists of the respective expressions.

选项

General options:

	ImageResolution	Automatic	resolution used for rendering the graphics
	ImageSize	Automatic	overall image size

Import and Export option:

"ImageTopOrientation"

Top

orientation of the image as stored in the file

Export options:

ByteOrdering	-1	ordering of bytes in the file
"ColorSeparation"	False	whether to store color channels in separate planes
"ColorSpace"	Automatic	color encoding to be used in the file
"CompressionLevel"	Automatic	compression level, given as a number between 0 and 1
"DifferencingPredictor"	False	whether to use horizontal differencing when using LZW or ZIP compression
"ImageEncoding"	None	how images are compressed in the file

Export to TIFF supports CMYKColor, GrayLevel, and RGBColor color spaces.

The following settings for are supported:

	None	no compression
	"JPEG"	lossy JPEG compression
	"LZW"	lossless LZW compression
	"PackBits"	PackBits run-length encoding method
	"ZIP"	lossless ZIP image data compression