How to open the gray scale image of Digital surface model (DSM)?

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N A
N A 2013-11-19
评论： N A 2013-11-19
I have a gray scale image of Digital Surface Model (DSM). I tried to open it with imread() from image processing toolbox but it only shows me a white image. when I open the matrix of image I found the weird numbers as matrix arrays and I attach the example here. My question is why it happens and how can I solve it?
Thanks in advance.
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  2 个评论
Laurent
Laurent 2013-11-19
Could you show the code you used to open your image, because according to the help, imread should give you a uint16 image if you load a grayscale jpg. And the matrix you attach is a single precision matrix.
N A
N A 2013-11-19
clc clear all I = imread('DEM.tif'); figure, imshow(I)
these are the codes our image is float 32 and even when we want to convert the data type it is not showing any change.

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回答（1 个）

Laurent
Laurent 2013-11-19
What if you use imagesc to show your image? There might be a problem with the scaling of your image.
imagesc(I)
  1 个评论
N A
N A 2013-11-19
the problem is not related to scale as I think, we have problem with values of the image in the matrix, when we want to show it it only gives us white image or black.

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