Nest Calls to Image Arithmetic Functions

You can use the image arithmetic functions in combination to perform a series of operations. For example, to calculate the average of two images,

`$C=\frac{A+B}{2}$`

You could enter

```I = imread('rice.png'); I2 = imread('cameraman.tif'); K = imdivide(imadd(I,I2),2); % not recommended ```

When used with `uint8` or `uint16` data, each arithmetic function rounds and clips its result before passing it on to the next operation. This can significantly reduce the precision of the calculation.

A better way to perform this calculation is to use the `imlincomb` function. `imlincomb` performs all the arithmetic operations in the linear combination in double precision and only rounds and clips the final result.

`K = imlincomb(.5,I,.5,I2); % recommended `