Integral Filter
Calculates the numerical integral over the input channels.
Category |
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Node |
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Parameters |
(None) |
Inputs |
Input: the input data to integrate |
Outputs |
Integral: the numerical integral of the input |
Effect of the Filter
The filter calculates the numerical integral of the input data using the trapezoidal approximation. This is done over the channels of the input, i.e. separately for each pixel.
If an integral is to be calculated over only a part of the full range, consider using a Channel Selection Filter to first restrict the input data to the desired range before calculating the integral.
Using an Akima Interpolation Filter before this filter may be used to interpolate the input function onto more data points than originally present, so that the result of the numerical integral more closely follows the shape of the curve.