How to convert unsigned integer 16 bit to decimal number

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Jim
Jim 2013-5-25
编辑： Jan 2018-2-20
Hi,
what is the difference between unsigned integer 16 bit
How can I convert uint16 to decimal number in matlab?
Thanks Jim

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回答（3 个）

Jan
Jan 2013-5-26
The meaning of the type UINT16 is explained in:
help uint16
doc uint16
While UINT16 variables can contain integer values between 0 and 2^16-1, they are displayed as decimal numbers as doubles, singles and the other integer types also. Binary or octal numbers would be non-decimal.
the cyclist
the cyclist 2013-5-25
编辑：the cyclist 2013-5-25
A uint16 is a 16-bit unsigned integer. You can read lots and lots of details about data types in MATLAB on this page: http://www.mathworks.com/help/matlab/data-types_data-types.html.
The default data type for most MATLAB calculations is "double", a double-precision real number. To convert a uint16 to a double:
x = double(xu16)
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the cyclist
the cyclist 2013-5-26
@Jim, I think Walter had in mind that doing this operation would add zero to the 16-bit unsigned integer variable xu16, but would also convert x a double. [But that did not work for me when I ran it.]

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mohd akmal masud
mohd akmal masud 2018-2-20
hi all,
i have image dicom 16 bit. Like below my image:
>>P=dicomread('PET_I1001_PT135.dcm');
>> whos P
Name Size Bytes Class Attributes
P 256x256 131072 int16
My problem is, 16 bit image can stored pixel value till 32767 only. Now i want change it to 32 bit or 64 bit so that the pixel value can stored more than that, and corresponding how much activity radionuclides i used to diagnosed patient.
can you help to convert that using matlab? or anyway to solve it?
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Jan
Jan 2018-2-20
编辑：Jan 2018-2-20
@mohd akmal masud: Please do not hijack an old existing thread by appending a new question in the section for answers. Afterwards it would be unclear, to which question an answer belongs and you cannot select an accepted answer. Delete this message here and open a new thread. Thanks.
By the way: P64 = int64(P)

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