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Convert image to 16-bit signed integers


I2 = im2int16(I)
RGB2 = im2int16(RGB)
I = im2int16(BW)
gpuarrayB = im2int16(gpuarrayA,___)


I2 = im2int16(I) converts the intensity image I to int16, rescaling the data if necessary. If the input image is of class int16, the output image is identical to it.

RGB2 = im2int16(RGB) converts the truecolor image RGB to int16, rescaling the data if necessary.

I = im2int16(BW) converts the binary image BW to an int16 intensity image, changing false-valued elements to -32768 and true-valued elements to 32767.

gpuarrayB = im2int16(gpuarrayA,___) performs the conversion on a GPU. The input image and output image are gpuArrays. This syntax requires the Parallel Computing Toolbox™.

Class Support

Intensity and truecolor images can be uint8, uint16, int16, single, double, or logical. Binary images must be logical. The output image is int16.

Intensity and truecolor gpuArray images can be uint8, uint16, int16, logical, single, or double. Binary gpuArray images must be logical. The output gpuArray image is int16.


collapse all

Create an array of class double.

I = reshape(linspace(0,1,20),[5 4])
I = 

         0    0.2632    0.5263    0.7895
    0.0526    0.3158    0.5789    0.8421
    0.1053    0.3684    0.6316    0.8947
    0.1579    0.4211    0.6842    0.9474
    0.2105    0.4737    0.7368    1.0000

Convert the array to class int16.

I2 = im2int16(I)
I2 = 5×4 int16 matrix

   -32768   -15522     1724    18970
   -29319   -12073     5173    22419
   -25870    -8624     8623    25869
   -22420    -5174    12072    29318
   -18971    -1725    15521    32767

Create array of class double.

I1 = gpuArray(reshape(linspace(0,1,20),[5 4]))

Convert array to uint8.

I2 = im2int16(I1)

Extended Capabilities

Introduced before R2006a

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