Specifications

Visualizing Images
The Image Processing Toolbox provides an
integrated environment for interactive image
display and exploration. You can load an
image from a file or from the MATLAB work-
space, adjust the contrast, examine a region
of pixels, view image information, zoom
and pan around the image, and track your
location in a large image using an overview
window. The image display environment is
modular and open, enabling you to customize
the tools provided and add your own.
MATLAB visualization tools let you repre-
sent the information in your image data as
histograms, contour plots, montages, pixel
profiles, transparent overlays, and images that
are texture-mapped onto surfaces. You can
view and measure image attributes, such as
the location and value of pixels in an image,
or display color bars to view the mapping of
colors to values. Volume visualization tools in
MATLAB let you create isosurface displays of
multidimensional image data sets.
Spatial Transformations and Image
Registration
Spatial transformations alter the spatial
relationships between pixels in an image
by mapping locations in an input image
to new locations in an output image. The
Image Processing Toolbox supports common
transformational operations, such as resizing,
rotating, and interactive cropping of images,
as well as geometric transformations with
arbitrary-dimensional arrays.
Image registration is important in remote
sensing, medical imaging, and other appli-
cations where images must be aligned to
enable quantitative analysis. Using the Image
Processing Toolbox, you can interactively
select points in a pair of images and align the
two images by performing a spatial trans-
formation, such as linear conformal, affine,
projective, polynomial, piecewise linear, or
local weighted mean.
Developing Algorithms
MATLAB and the Image Processing Toolbox
provide a comprehensive platform for inter-
acting with image data and developing image
processing algorithms. The toolbox adds
reference-standard image processing and
analysis algorithms and image-specific graph-
ical tools to the high-level language, basic
mathematical functions, development tools,
and visualization capabilities of MATLAB.
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Choosing control points to register
an aerial photo to an orthophoto.
The control point selection tool
helps you select landmark points
and align images.
Visible color
aerial photographs courtesy of mPower3/
Emerge. Orthoregistered photographs
courtesy of MassGIS.
Required Products
MATLAB
Related Products
Image Acquisition Toolbox.
Acquire images
and video from industry-standard hardware
Mapping Toolbox.
Analyze and visualize
geographic information
Signal Processing Toolbox.
Perform signal pro-
cessing, analysis, and algorithm development
Video and Image Processing Blockset.
Design and simulate video and image
processing systems and components
Platform and System Requirements
For platform and system requirements, visit
www.mathworks.com/products/image/ ■