jburkardt

IMAGE_COMPONENTS\ Connected Components of an Image or Matrix {#image_components-connected-components-of-an-image-or-matrix align=”center”} ==========================================

IMAGE_COMPONENTS is a C++ library which seeks to count and label the connected nonzero/nonblack components in an image or integer vector, matrix or 3D block.

Licensing: {#licensing align=”center”}

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Languages: {#languages align=”center”}

IMAGE_COMPONENTS is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATLAB version.

IMAGE_DENOISE, a C++ library which applies simple filtering techniques to remove noise from an image.

IMAGE_EDGE, a C++ library which demonstrates a simple procedure for edge detection in images.

REGION, a FORTRAN90 library which reads 3D MRI voxel data, and groups the voxels into connected regions;

Reference: {#reference align=”center”}

Jonas Gomes, Luiz Velho,\ Image Processing for Computer Graphics,\ Springer, 1997,\ ISBN: 0387948546,\ LC: T385.G65.
William Pratt,\ Digital Image Processing,\ Second Edition,\ Wiley, 1991,\ ISBN13: 978-0471857662,\ LC: TA1632.P7.

Source Code: {#source-code align=”center”}

components.cpp, the source code.
components.hpp, the include file.

Examples and Tests: {#examples-and-tests align=”center”}

components_prb.cpp, a sample calling program.
components_prb_output.txt, the output file.
indices.txt, a file of 3D indices needed for the test of I4BLOCK_COMPONENTS.

List of Routines: {#list-of-routines align=”center”}

FILE_COLUMN_COUNT counts the columns in the first line of a file.
FILE_ROW_COUNT counts the number of row records in a file.
I4_MIN returns the minimum of two I4’s.
I4BLOCK_COMPONENTS assigns contiguous nonzero pixels to a common component.
I4MAT_COMPONENTS assigns contiguous nonzero pixels to a common component.
I4MAT_DATA_READ reads data from an I4MAT file.
I4MAT_HEADER_READ reads the header from an I4MAT file.
I4VEC_COMPONENTS assigns contiguous nonzero pixels to a common component.
S_LEN_TRIM returns the length of a string to the last nonblank.
S_TO_I4 reads an I4 from a string.
S_TO_I4VEC reads an I4VEC from a string.
S_WORD_COUNT counts the number of “words” in a string.
TIMESTAMP prints the current YMDHMS date as a time stamp.

You can go up one level to the C++ source codes.

Last revised on 01 March 2011.