how to add labels in an image

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dakhli mohamed 2019-2-13

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回答： Walter Roberson 2019-2-13

采纳的回答： Walter Roberson

Hello

I want to add labels that represents the color blue is water the color green is the tree and the color red is rock

here is the code as well as the attached images "

And thank you in advance

imgs(2) = load('C1fig.mat');

imgs(1) = load('C2fig.mat');

imgs(3) = load('C3fig.mat');

img = cat(3, imgs.ans);

imshow(img)

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Walter Roberson 2019-2-13

labels ? As in a legend? Or every area of a given type should have a text label drawn on the area if it is large enough and a label with an arrow pointing to the location if the area is not large enough to contain the label ?

dakhli mohamed 2019-2-13

just a legend at the top left that indicates the color and its corespandances

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Walter Roberson 2019-2-13

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/444693-how-to-add-labels-in-an-image#answer_360813

hh(1) = line(nan, nan, 'color', 'b')

same for the other two colors into hh 2 and hh 3

legend(hh,{'water','tree','rock'})

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