Why getting black image as output?

I have 3 bands images.(tif). I try to open it but it look black. why? how can I open it colored?

I=imread('10030050.tif');

imshow(I)

[Walter Roberson]

What shows up for size(I) and class(I) and max(I(:)) ?

[Merve YILDIRIM]

>> size(I)

ans =

13824 7680 3

>> class(I)

ans =

'uint16'

>> max(I(:))

ans =

uint16

4095

[Merve YILDIRIM]

image is truecolor.

Answer 1

[Walter Roberson]

You are only using 1/16th of the possible data range.

Is = double(I)/4095;
imshow(Is)

[Merve YILDIRIM]

ohh, thank you so much :))

so, does the quality of my image go bad?

[Walter Roberson]

does the quality of my image go bad?

I am not sure what you mean, but probably not.

When you are using uint16 data, it is common that the "interesting" part of it is only a small range. But you have to figure out what that interesting area is for your purposes. imhist() can sometimes help with that

For example,

imshow(I, [2000 2400])

[Merve YILDIRIM]

Ok. I guess so, my data’ s size big so matlab is stoped. Error: memory Do you think so?

[Walter Roberson]

Your image is not all that big, but if you were to be trying to compare every column to every other column, you could run out of memory.

[Merve YILDIRIM]

Ok, I see. Thank you so so much :)