image_boundary, an Octave code which determines the pixels that lie on the boundary between the black and white portions of a simple image. The image should only involve two regions, one entirely black and one entirely white.
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image_boundary is available in a MATLAB version and an Octave version.
image_contrast, an Octave code which applies image processing techniques to increase the contrast in an image.
image_decimate, an Octave code which compresses an image by dropping the even rows and columns of data.
image_denoise, an Octave code which applies image processing techniques to remove noise from an image.
image_diffuse, an Octave code which uses diffusion to smooth out an image.
image_double, an Octave code which doubles the height and width of an image by repeating each row and column.
image_edge, an Octave code which demonstrates a simple technique for edge detection in an image.
image_noise, an Octave code which adds noise to an image.
image_quantization, an Octave 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, an Octave code which creates a grayscale version of an RGB image.
image_threshold, an Octave code which makes a black and white version of a grayscale image by setting all pixels below or above a threshold value to black or white.
mesh_boundary, an Octave code which is given a mesh of a 2D region, formed by polygonal elements, and determines a sequence of pairs of polygonal vertices that define the boundary of the region.
poly, a data directory which contains examples of POLY files, a 2D format used by triangle and showme, for Planar Straight Line Graphs.