Why is my hypercube only showing black?

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Keegan 2024-5-21

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评论： Keegan 2024-5-22

edit: For some reason, the Data Cube in the unseccessful hypercubes are blank. I have no idea why or any idea of how to fix them.

I am trying to use the hypercube() function to look at my hypercube on MATLAB, but for some reason it's not working for a few of them. I have a .bil and .hdr file, and was successfully able to create an hcube value, but when I try to display the image, it's completely black.

I had a previous successful attempt with a different hypercube, and the only differences I can see between the two is that the DataCube for the successful hypercube is labeled as 'single', while the unsuccessful hypercubes are labeled as 'uint16'. Could this be the reaosn why they're not working?

Here's an example of what I see (hcube is successful, hcube2 is not):

hcube =
    hypercube with properties:
        DataCube: [2250x1032x150 single]
        Wavelength: [150x1 double]
        Metadata: [1x1 struct]
        
hcube2 =
    hypercube with properties:
        DataCube: [49x45x300 uint16]
        Wavelength: [300x1 double]
        Metadata: [1x1 struct]

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Answer 1

Manasa Singam 2024-5-22

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Hi Keegan,

Usually, there won't be any issues with class type when we are visualizing the data. I am feeling here the issue is not because of class type, but the data limits.

Can you let me know what are the data limits (minimum value and maximum value) of the band or data you want to display and how you are visualizing, i mean which function you are using to visualize the data, is it imshow?

if you are using imshow, then use the syntax:

imshow(data,[ ])

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Keegan 2024-5-22

Hi Masana,

So it seems like the problem lies in the datacube itself, beause it's blank. I'll get in contact with the program I'm getting the cube from to see what's up with that.

Thanks.

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