components, a MATLAB code which organizes contiguous nonzero cells into labeled components, for a 1D, 2D, or 3D array. This code has uses in image analysis and percolation simulation.
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components is available in a C version and a C++ version and a Fortran77 version and a Fortran90 version and a MATLAB version and an Octave version and a Python version.
bwlabel_test, a MATLAB code which calls bwlabel(), which is given a matrix, and organizes the nonzero values into labeled components, using 4-way or 8-way connectivity. For MATLAB, bwlabel() is part of the Image Processing Toolbox.
image_boundary, a MATLAB code which reports the pixels which form the boundary between the black and white regions of a simple image.
image_contrast, a MATLAB code which applies image processing techniques to increase the contrast in an image.
image_decimate, a MATLAB code which compresses an image by dropping the even rows and columns of data.
image_denoise, a MATLAB code which applies image processing techniques to remove noise from an image.
image_diffuse, a MATLAB code which uses diffusion to smooth out an image.
image_double, a MATLAB code which doubles the height and width of an image by repeating each row and column.
image_edge, a MATLAB code which demonstrates a simple procedure for edge detection in images.
image_noise, MATLAB codes which add noise to an image.
image_quantization, a MATLAB code which demonstrates how the KMEANS algorithm can be used to reduce the number of colors or shades of gray in an image.
image_rgb_to_gray, a MATLAB function which creates a grayscale version of an RGB image.
image_threshold, a MATLAB code which creates a black and white version of a grayscale image by specifying a single threshold value; pixels below this value become black, and above this value they are white.