VisualApplets
Operator Reference

Operator Library: Arithmetics

The operator calculates the arccot of the input.

The input range of arccot is [∞, ∞]. This operator includes a parameter Resolution to define the fixed point resolution bits of the input values. The input range is given by the number of input bits =

where

is the bit width at the input and R the resolution bits.

The argument x of the arccot function is determined by

The results of the arccot function are in the range ]0, π[. The output value range of the operator in VisualApplets is mapped to

where

is the bit width at the output link. Thus the output value is

The following image shows the plot of the arccot function.

In the next figure, the VisualApplets operator implementation is shown. Note the input and output bit widths.

Le't have a look at an input pixel value. For example -100. With the given resolution of four, the real value representation of the pixel value is -100/16. The arccot result of -100/16 is arccot(-100/16) = 2.98. In pixel value representation this result becomes 122 which is the same as shown in the plot.