Documentation

im2int16

Convert image to 16-bit signed integers

Syntax

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

Description

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.

This function supports code generation (see Tips).

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.

Examples

Convert array to int16.

I = reshape(linspace(0,1,20),[5 4])
I2 = im2int16(I)
I1 =

         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


I2 =

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

Convert array to int16 on a GPU.

I1 = gpuArray(reshape(linspace(0,1,20),[5 4]))
I2 = im2int16(I1)

More About

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Tips

  • This function supports the generation of C code using MATLAB® Coder™. The code generated for this function uses a precompiled, platform-specific shared library. Use of a shared library preserves performance optimizations but limits the target platforms for which code can be generated. For more information, see Understanding Code Generation with Image Processing Toolbox.

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