Converting Image data from integer to double

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Dimitris M
Dimitris M 2012-5-24
Hello
I have a question concerning image transformation from uint8 to double.
I want to do an image band rationing (NDVI) and I need to transform my image band data from integer to double, so their ratio result in double precision.
The problem occurs when I am trying either to transform an image band to double ---> using cast()
The resulting in image is a binary image !
The same thing happens when I am transforming all the image to double using cast() (not only an image band).
Do you know what is the problem ? Is there any other way to do an image rationing ?
Thank you in advance
Greetings from Greece

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