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.


function bw = image_threshold ( gray, a )


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


image_threshold is available in a MATLAB version.

Related Data and Programs:

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 technique for edge detection in an image.

image_noise, a MATLAB code which adds 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.



MathWorks documentation for the Image Processing Toolbox is available at

Source Code:

Last revised on 04 February 2019.