National University of Singapore

ANALYZE is an integrated set of programs created mainly for biomedical image processing and includes features such as segmentation, classification, registration and display. It uses digital image data sets to produce additional representations of the data set, along with other types of information (e.g., statistical information). ANALYZE is comprehensive in that it provides facilities for analysing image sets in two, three and four dimensions.

Facilities The ANALYZE package enables you to display, manipulate, and measure ANALYZE digital images. The programs are designed to work efficiently with three-dimensional and four-dimensional image sets. All of the programs are linked by access to a shared memory, image database system, and a common user interface. Facilities exist for all of the following:

• reading and writing images from and to magnetic tape,
• viewing images,
• transforming and reformatting images,
• statistical sampling and analysis of images,
• performing quantitative measurements,
• extracting and viewing slices from volumes of images,
• generation of special volume image displays,
• preparation of animated movie sequences,
• text editing and preparation.

AVW

In terms of functionality, AVW is similar to ANALYZE. The functions available in this library are grouped into the following categories:

 

Resource

Basic routines to create and destroy many of the AVW structures. Also included are list management, verification, and byte swapping routines.

Image I/O

Functions which provide a user extendible interface which allows the reading and writing of images in many common formats.

Transform

Functions include 2D and 3D spatial transformations, densitometric transformations and mathematical transformations. The functions necessary for oblique and curved sectioning, wavelet enhancement transformations, and image registration/fusion are also included.

Process

Functions provide a wide variety of histogram operations, spatial/convolution filtering, 3D FFTs, 3D Fourier domain filtering and deconvolution, including fast nonlinear iterative methods.

Segment

Functions include thresholding, 2D and 3D region growing, automated boundary detection, creation of object maps, multi-resolution decomposition, morphological processing and multi-spectral classification.

Analysis

Functions include extraction of line profiles, sampling of ROIs (regions of interest) which includes the computation of size, density, shape and texture parameters (e.g., area, mean, circularity, fractal signature).

Visualize

Volume rendering routine includes depth-only shading, depth gradient shading, voxel gradient shading, integrated surface projection, maximum intensity projection and summation projection. Functions to support multiple object creation and rendering, color transparency (24-bit), image extraction tools, and image measurement tools are supported in conjunction with the volume rendering functions.