What is the code for high boost filter

Please send me a small code for applying high boost filter to an image. I am not getting how to code it for high boost filter.

Answer 1

[Image Analyst]

You could add a laplacian to a delta function to get a new convolution kernel

laplacianKernel = [-1, -1, -1; -1, 8, -1; -1, -1, -1];
deltaFunction = [0, 0, 0; 0, 1, 0; 0, 0, 0];
scaleFactor = 1; % Whatever... From 0 to +255, including fractional numbers like 0.5
kernel = laplacianKernel + scaleFactor * deltaFunction;
% Normalize so that the mean intensity doesn't change.
kernel = kernel / sum(kernel(:))
% Filter the image
filteredImage = imfilter(originalImage, kernel);