MATLAB IMAGE PROCESSING TOOLBOX - RELEASE NOTES Guia do Utilizador descarregar pdf (Página 46)

R2012b

6-2

Image gradient computation with imgradient and imgradientxy

functions

The toolbox includes two new functions for computing image gradients: imgradient

and imgradientxy. imgradient computes the gradient magnitude and direction.

imgradientxy computes the X and Y directional gradients

Histogram matching with imhistmatch function

The new function imhistmatch adjusts the histogram of an image to match the N-bin

histogram of a reference image.

Multilevel thresholding with multithresh and imquantize functions

The new imquantize and multithresh functions enable multilevel grayscale thresholding

and labeling. imquantize labels an image using a fixed range of grayscale levels.

multithresh computes threshold levels using Otsu's method. The levels computed by

multithresh can be used as input to imquantize.

3-D image registration with imregister function

In addition to 2-D images, imregister can now align 3-D images using intensity-based

registration of the images' voxel data.

Code generation for bwmorph and bwlookup with MATLAB Coder

Standalone C code can be generated for bwmorph and bwlookup. The generated C code

meets the strict memory and data type requirements of embedded target environments.

To generate this code you need a MATLAB Coder license.

Added function bwlookup

Compatibility Considerations

Function applylut is not recommended; use bwlookup instead.

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MATLAB IMAGE PROCESSING TOOLBOX - RELEASE NOTES Guia do Utilizador Página 46