How can i know the edge weight of each region in an image.?
MATLAB: How can i know the edge weight of each region in an image.
edgegradientImage Processing Toolboxsobel
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If you're using a graph or digraph and want to find the Weight for a particular edge, look at the Edges table, possibly in conjunction with findedge. Using the digraph created on this page with the Weights:
s = [1 1 2 2 3];t = [2 4 3 4 4];G = digraph(s,t);G.Edges.Weight = [10 20 30 40 50]';GG.EdgesI can extract the weights of the edge between 1 and 4 with either of these lines:
G.Edges.Weight(findedge(G, 1, 4))G.Edges{findedge(G, 1, 4), 'Weight'}Of course, the shortestpath method gives you the edge IDs, so you don't need to use findedge here. Since edge (1, 4) is the second edge:
G.Edges{2, 'Weight'}You can set the LineStyle to be 'none' for edges that should not be displayed:
>> g = digraph([3 1 2], [2 3 1], [0 0.5 1]);>> p = plot(g, 'LineWidth', max(5*g.Edges.Weight, 1));>> highlight(p, 'Edges', find(g.Edges.Weight == 0), 'LineStyle', 'none');
Unfortunately, EdgeAlpha is a scalar property, which can't be set to different values for each edge.
Alternatively, you could use 'EdgeCData' to represent each edge's value with a different color:
>> plot(g, 'EdgeCData', g.Edges.Weight, 'LineWidth', 3);>> colorbar>> colormap(flip(gray))
Here I've set up the color map such that an edge with zero weight is shown as white. As long as the background is white and there aren't too many edges intersecting, this will look the same as if the edge had disappeared.
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