Version 7.1 (R2010b) Image Processing Toolbox

This table summarizes what's new in Version 7.1 (R2010b).

New Features and Changes	Version Compatibility Considerations	Fixed Bugs and Known Problems
Yes Details below	Yes—Details labeled as Compatibility Considerations, below. See also Summary.	Bug Reports Includes fixes

The following sections describe new features and changes introduced in this version:

• New corner Function Detects Corners in Image

• Efficient Display and Navigation of Very Large Images of Arbitrary Format in imtool

• Now Possible to Control Padding Behavior when Using the blockproc Function

• Writing to JPEG2000 File Format Supported by blockproc

• Enhancements to the dicomread Function

• The ImageMagnification Field of the nitfinfo Function Now Returns a Numeric Value

• Performance Improvements

• Functions and Function Elements Being Removed

New corner Function Detects Corners in Image

The new corner function detects corners in a grayscale or binary image. Corners are a feature you can use to find the correspondence between images.

Compatibility Considerations

In R2008b and later releases, you could find corners by computing a cornermetric matrix with the cornermetric function and then finding peak values. Now, you can simplify your workflow by using the corner function.

Efficient Display and Navigation of Very Large Images of Arbitrary Format in imtool

The rsetwrite function allows you to create a multiresolution image pyramid (R-Set) from a large image file. In previous releases, the rsetwrite function accepted TIFF or NITF image files. Now, in addition to accepting these image files, rsetwrite accepts ImageAdapter objects. ImageAdapter objects allow you to work with images of arbitrary file format. See Working with Data in Unsupported Formats for guidelines on how to create an ImageAdapter object.

Now Possible to Control Padding Behavior when Using the blockproc Function

With the new 'PadMethod' option, you can now control padding behavior when using the blockproc function. In previous releases, the blockproc function only supported zero padding along the boundary of the image. Now, the function supports padding the image with a scalar pad value, repeated border elements of A, or the mirror reflection of A.

Writing to JPEG2000 File Format Supported by blockproc

The blockproc function now provides more flexibility in format choices. The function supports writing to JPEG2000 file formats with *.jp2, *j2c, or *.j2k extensions.

Enhancements to the dicomread Function

The dicomread function has been enhanced in two ways: the function now reads multiframe imagery faster, and it reads files containing JPEG-2000 encoded imagery.

The ImageMagnification Field of the nitfinfo Function Now Returns a Numeric Value

The ImageMagnification field of the nitfinfo function has been updated. Previously, if you used the function to return a structure with file-level metadata, the ImageMagnification field of the structure contained an incorrect value. (The incorrect value was either an empty image magnification value or the text value for the field.) Now, the ImageMagnification field returns the value for the image magnification.

Performance Improvements

Faster Functions

• blockproc

• imresize

• iradon

Functions and Function Elements Being Removed

Function or Function Element Name	What Happens When You Use This Function or Element?	Use This Instead	Compatibility Considerations
blkproc	Still runs	blockproc	None

Version 7.2 (R2011a) Image Processing Toolbox

Version 7.0 (R2010a) Image Processing Toolbox

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