README.txt
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2D图形编程
开发平台:
Matlab
- GRADIENT VECTOR FLOW DEMONSTRATION USING MATLAB
- Chenyang Xu and Jerry Prince
- Image Analysis and Communications Laboratory
- Johns Hopkins University
- June 17, 1997
- Please see contact and copyright information below.
- 1. Introduction and Installation Instructions
- ----------------------------------------------
- Welcome to the Gradient Vector Flow (GVF) Active Contour Toolbox. The
- Matlab *.m files in this software distribution implement our GVF snake,
- the original (Kass, Witkin, and Terzopoulos) snake, the balloon snake,
- and the distance snake. These programs were designed, written and tested
- by Chenyang Xu and Jerry Prince.
- To install this software, simply unzip the file into an empty directory,
- making sure to ask your unzipper program to restore the directory
- structure of the zipped files. In this documentation, we will assume
- that you have unzipped the files into C:GVF.
- 2. Documentation
- ----------------
- We have included two research papers that describe GVF. You can find
- these in C:GVFpapers.
- Brief descriptions of the software modules can be found in this file
- below. For more detail, you should run Matlab, add the path
- C:GVFsnake, and type "help function-name". For even more help, you can
- read the *.m files themselves.
- Also, see our GVF demonstration website: http://iacl.ece.jhu.edu/projects/gvf
- 3. MATLAB functions
- -------------------
- The MATLAB functions included in the distribution are found in
- C:GVFsnake (assuming the distribution was unzipped into C:GVF).
- They are classified and listed as follows:
- Image input/output
- rawread - Read a Portable Bitmap file, or a raw file
- rawwrite - Write a Portable Bitmap file, or a raw file
- Image Display
- imdisp - Display an image
- Active Contour
- snakeinit - Initialize the snake manually
- snakedeform - Deform snake in the given external force field
- snakedeform2 - Deform snake in the given external force field with
- pressure force
- snakedisp - Display a snake
- snakeinterp - Interpolate the snake adaptively
- snakeinterp1 - Interpolate the snake at a fixed resolution
- (better implemented than snakeinterp)
- Gradient Vector Flow
- GVF - Compute the gradient vector flow field
- Other
- dt - Simple distance transform
- gaussianBlur - Blurring an image using gaussian kernel
- gaussianMask - Generate a discrete gaussian mask
- To use these functions, add the path C:GVFsnake to the Matlab path
- using the "path" command. Once the path is set, you can type "help
- snake" to list more details about the above functions.
- 4. Examples
- To see how these functions work, it is best to start by running
- the following example macros. To do this, in Matlab cd to the directory
- C:GVFexamples. Then type one of the following commands and follow
- the instructions of the demo.
- balloon_ex.m
- distance_ex.m
- gvf_ex.m
- tradition_ex.m
- 5. Test Images
- --------------
- ./images/U64.pgm - a U-shaped object
- ./images/room.pgm - a room-shaped object
- 6. Contact Information
- ----------------------
- Image Analysis and Communications Lab
- Department of Electrical and Computer Engineering
- The Johns Hopkins University
- Baltimore, MD 21218
- E-mail: chenyang@jhu.edu, prince@jhu.edu
- Phone: 410-516-7567 (lab)
- FAX: 410-516-5566
- 7. Copyright and Disclaimer
- ---------------------------
- Copyright (c) 1996-1997 Chenyang Xu and Jerry Prince.
- This software is copyrighted by Chenyang Xu and Jerry Prince. The
- following terms apply to all files associated with the software unless
- explicitly disclaimed in individual files.
- The authors hereby grant permission to use, copy, and distribute this
- software and its documentation for any purpose, provided that existing
- copyright notices are retained in all copies and that this notice is
- included verbatim in any distributions. Additionally, the authors grant
- permission to modify this software and its documentation for any
- purpose, provided that such modifications are not distributed without
- the explicit consent of the authors and that existing copyright notices
- are retained in all copies.
- IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY PARTY FOR
- DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING
- OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION, OR ANY DERIVATIVES
- THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF
- SUCH DAMAGE.
- THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
- INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, AND THE AUTHORS AND
- DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
- UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
- =========================================================================