show an image as categorised

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Hassan
Hassan 2011-6-29
I have an image with 3 layers (R,G,B). I want to show each layer as a cateogorised image as I can define the range of values in each category. I also want to add a legend as it show the range of values and the assigned color, a map scale (in kilometer) and geographical north direction. for eaxample I want to show the layer 1 as: 0.05-0.1>>blue 0.1-0.15>>green 0.15-0.2>>yellow 0.2-0.25>>red
Could you please help me about that?

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回答（2 个）

Walter Roberson
Walter Roberson 2011-6-29
Perhaps you could use contour() and supply the level list
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Walter Roberson
Walter Roberson 2011-6-30
Which direction does using Myimg(:,:,1) display relative to what you would like displayed?
Hassan
Hassan 2011-6-30
well in the array I want to have each pixel displayed according to its row and column.

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Sean de Wolski
Sean de Wolski 2011-6-29
Perhaps you could convert it to be identical to a label image and then use label2rgb to show it?
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Hassan
Hassan 2011-6-29
a(:,:,1) =
0.1000 0
0.0050 0.5000
a(:,:,2) =
0.1500 0.0500
0.0550 0.5500
a(:,:,3) =
0.2000 0
0.0100 1.0000
for example in the array a, I want to have 3 category like:
a(:,:,1):
0.001 to 0.005>>blue
0.006 to 0.1>>green
0.1 to 0.5>> yellow
for a(:,:,2):
0.01 to 0.05>>blue
0.06 to 0.15>>green
0.16 to 0.55>> red
and so on
Hassan
Hassan 2011-6-30
sorry Sean, I didnt underestand what I should do.

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