Convert it into index type

2020 7 12
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更新时间：2020 7 12
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I have this two Question :
1)Read the image (‘flage.png’)?
2)Convert it into index type and display it ?
I solved the first one :
image_mat = imread('flage.png');
But How can i solve the second one ?

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Walter Roberson
Walter Roberson 2020-7-12

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[image_mat, cmap] = imread('flage.png');
if isempty(cmap)
if ndims(image_mat) > 2
image_rgb = image_mat;
else
image_rgb = repmat(image_mat, [1 1 3]);
end
else
image_rgb = ind2rgb(image_mat, cmap);
end
imshow(image_rgb)

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