Read and Write Image Data from Files

Read and write image data from files, get information about contents of image files

Image Processing Toolbox™ enables you to read and write image files in many common file formats including BMP, GIF, JPEG, PNG, and TIFF. The toolbox supports reading and writing medical file formats including DICOM, NIfTI, and Analyze 7.5. The toolbox also supports reading RAW file formats. You can also work with images in specialized file formats, including NITF, DPX, and Interfile.

Apps

DICOM Browser

Explore collection of DICOM files

Functions

expand all

Generic File Import and Export

`imread`	Read image from graphics file
`imwrite`	Write image to graphics file
`imfinfo`	Information about graphics file

Work with DICOM Files

`dicominfo`	Read metadata from DICOM message
`dicomfind`	Find location and value of target attribute in DICOM metadata
`dicomupdate`	Update value of target attribute in DICOM metadata
`dicomread`	Read DICOM image
`dicomwrite`	Write images as DICOM files
`dicomreadVolume`	Create 4-D volume from set of DICOM images
`dicomCollection`	Gather details about related series of DICOM files
`dicomContours`	Extract ROI data from DICOM-RT structure set
`dicomanon`	Anonymize DICOM file
`dicomdict`	Get or set active DICOM data dictionary
`dicomdisp`	Display DICOM file structure
`dicomlookup`	Find attribute in DICOM data dictionary
`dicomuid`	Generate DICOM globally unique identifier
`images.dicom.decodeUID`	Get information about DICOM unique identifier
`images.dicom.parseDICOMDIR`	Extract metadata from DICOMDIR file

Work with RAW Files

`rawinfo`	Read metadata from RAW file
`rawread`	Read color filter array (CFA) image from RAW file
`raw2rgb`	Transform color filter array (CFA) image in RAW file into RGB image
`planar2raw`	Combine planar sensor images into full Bayer pattern CFA
`raw2planar`	Separate Bayer pattern color filter array (CFA) image into sensor element images

Work with Specialized File Formats

`tiffreadVolume`	Read volume or time series image stack from TIFF file
`niftiinfo`	Read metadata from NIfTI file
`niftiwrite`	Write volume to file using NIfTI format
`niftiread`	Read NIfTI image
`analyze75info`	Read metadata from header file of Analyze 7.5 data set
`analyze75read`	Read image data from image file of Analyze 7.5 data set
`interfileinfo`	Read metadata from Interfile file
`interfileread`	Read images in Interfile format
`nitfinfo`	Read metadata from National Imagery Transmission Format (NITF) file
`nitfread`	Read image from NITF file
`isnitf`	Check if file is National Imagery Transmission Format (NITF) file
`dpxinfo`	Read metadata from DPX file
`dpxread`	Read DPX image
`exrinfo`	Read metadata from EXR file
`exrread`	Read image data from EXR file
`exrwrite`	Write image data to EXR file
`isexr`	Check if file is valid EXR file
`exrHalfAsSingle`	Convert numeric values into half-precision values

Topics

Read and Write Standard Graphics Files

Image Types in the Toolbox

Image types determine how MATLAB^® interprets data matrix elements as pixel intensity values. The toolbox supports many image types including binary, grayscale, truecolor, multispectral, and label images.

Work with RAW Files

Implement Digital Camera Processing Pipeline
This example shows how to implement a camera processing pipeline that renders an RGB image from a RAW Bayer-pattern color filter array (CFA) image.

Work with DICOM and Other Medical Files

DICOM Support in Image Processing Toolbox

The Digital Imaging and Communications in Medicine (DICOM) Standard facilitates access to image data and files across medical imaging equipment.
Mayo Analyze 7.5 Files
Analyze 7.5 is a file format, developed by the Mayo Clinic, for storing MRI data.
Interfile Files
Interfile is a file format that was developed for the exchange of nuclear medicine image data.

Featured Examples

Create Image Datastore Containing DICOM Images

Create an image datastore from a collection of DICOM files containing 2-D images.

Open Live Script

Create Image Datastore Containing Single and Multi-File DICOM Volumes

Create an image datastore containing volumetric DICOM data stored as a single file and as multiple files.

Open Live Script