RegionGrowingAlgorithm/AddNeighbors.m at master · GainiK/RegionGrowingAlgorithm · GitHub

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function AddNeighbors( imageRowCount, imageColCount, row, col, neighborhoodType, neighborList, visitedMatrix )
%ADDNEIGHBORS Adding
%   Detailed explanation goes here

    if row < 1 || row > imageRowCount || col < 1 || col > imageColCount
        return;
    end

    % Left Neighbor
    AddNeighborToList(imageRowCount, imageColCount, row, col - 1, neighborList, visitedMatrix);

    % Top Neighbor
    AddNeighborToList(imageRowCount, imageColCount, row - 1, col, neighborList, visitedMatrix);

    % Right Neighbor
    AddNeighborToList(imageRowCount, imageColCount, row, col + 1, neighborList, visitedMatrix);

    % Bottom Neighbor
    AddNeighborToList(imageRowCount, imageColCount, row + 1, col, neighborList, visitedMatrix);

    if neighborhoodType == 8

        % Top Left Neighbor
        AddNeighborToList(imageRowCount, imageColCount, row - 1, col - 1, neighborList, visitedMatrix);

        % Top Right Neighbor
        AddNeighborToList(imageRowCount, imageColCount, row - 1, col + 1, neighborList, visitedMatrix);

        % Bottom Right Neigbor
        AddNeighborToList(imageRowCount, imageColCount, row + 1, col + 1, neighborList, visitedMatrix);

        % Bottom Left Neighbor
        AddNeighborToList(imageRowCount, imageColCount, row + 1, col - 1, neighborList, visitedMatrix);

    end

end

function AddNeighborToList(imageRowCount, imageColCount, row, col, neighborList, visitedMatrix)

    if row < 1 || row > imageRowCount || col < 1 || col > imageColCount
        return;
    end

    if visitedMatrix(row, col) == 0
        neighborList.add([row col]);
    end

end