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How can I write a multi-band image in jp2 format?

Asked by Thomas Flick on 11 Nov 2019 at 20:53
Latest activity Commented on by Thomas Flick on 18 Nov 2019 at 14:36
I would like to compress a multi-band image with JPEG-2000 compression. I tried the following lines but got an error, "4 channels not supported for JP2 files. Only 1 and 3 channels are supported."
test = zeros(10,10,4,'uint8'); imwrite(test,'test.jp2');
Is there a workaround for this problem? JPEG-2000 compresses each band individually so I don't understand the limitation.

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1 Answer

Answer by Urmila Rajpurohith on 15 Nov 2019 at 9:51

As mentioned in the error jp2 files support either 1 channel or 3 channels.
To write multi-band image in jp2 format you can follow below workflow.
First you can extract individual channel and then convert them to jp2 format using “imwrite function and you can read them using “imread function and then you can stack all 4 bands and write them to .tiff format using imwrite function
(or)
You can use “multibandwrite” function to save the multiband data.
But in this method, you will be able to save multichannel image & you will not be able to achieve the jp2 compression.
You can refer to the below documentation for more information on how to use “multibandwrite” function.

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Yes, I saw the multibandwrite function, but I need to achieve jp2 compression.

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