std2
Standard deviation of matrix elements
Syntax
Description
Examples
Compute 2-D Standard Deviation
Read a grayscale image into the workspace, then calculate the standard deviation of the pixel intensity values.
I = imread('liftingbody.png');
val = std2(I)
val = 31.6897
Input Arguments
A
— Input data
numeric array | logical array
Input data, specified as a numeric or logical array.
Data Types: single
| double
| int8
| int16
| int32
| int64
| uint8
| uint16
| uint32
| uint64
| logical
Output Arguments
B
— Standard deviation
numeric scalar
Standard deviation of input data, returned as a numeric scalar. If the data type of
A
is single
, then the data type
of B
is also single
. Otherwise, the
data type of B
is double
.
Data Types: single
| double
Extended Capabilities
C/C++ Code Generation
Generate C and C++ code using MATLAB® Coder™.
std2
supports the generation of C
code (requires MATLAB®
Coder™). For more information, see Code Generation for Image Processing.
GPU Arrays
Accelerate code by running on a graphics processing unit (GPU) using Parallel Computing Toolbox™.
This function fully supports GPU arrays. For more information, see Image Processing on a GPU.
Version History
Introduced before R2006aR2024b: Generate C code using MATLAB Coder
std2
now supports the generation of
C code (requires MATLAB
Coder).
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