Filtration thresholding

1. A measurement system comprising:

a receiver configured to receive a measurement signal indicative of a parameter of a measured object; and

a processor configured to:

iteratively filter the measurement signal using a threshold value of a predefined magnitude for each of a plurality of iterations;

adjust the threshold value for an iteration of filtration of the plurality of iterations when a signal-to-noise ratio computed for the iteration of filtration is not a highest signal-to-noise ratio among each signal-to-noise ratio computed for each iteration of filtration;

compute a signal-to-noise ratio for each iteration of filtration; and

set a filtering threshold value to the threshold value for an iteration of filtration with the highest signal-to-noise ratio among each signal-to-noise ratio computed for each iteration of filtration,

wherein iteratively filtering the measurement signal comprises:

dividing the measurement signal into a plurality of samples;

computing a magnitude for each sample;

filtering signals from the plurality of samples having a magnitude lower than the threshold value for each iteration of filtration; and

reconstructing the plurality of samples into filtered data after filtering the signals from the plurality of samples.

2. The measurement system of claim 1 , wherein processor is configured to compute the signal-to-noise ratio for each iteration of filtration by:

setting a signal value to a peak value of the filtered data for each iteration of filtration;

setting a noise value to a standard deviation of the filtered data for each iteration of filtration; and

dividing the signal value by the noise value.

3. The measurement system of claim 1 , wherein the processor is configured to filter frequency magnitudes that repeat across multiple samples of the plurality of samples.

4. The measurement system of claim 1 , wherein the measurement signal comprises at least one of an eddy current signal and an ultrasound signal.

5. A method comprising:

receiving, by a receiver, a measurement signal indicative of a parameter of a measured object;

iteratively filtering, by a processor, the measurement signal using a threshold value of a predefined magnitude for each of a plurality of iterations, wherein iteratively filtering the measurement signal comprises:

incrementing the threshold value for an iteration of filtration when a signal-to-noise ratio computed for the iteration of filtration is not a highest signal-to-noise ratio among each signal-to-noise ratio computed for each iteration of filtration;

filtering the measurement signal using the threshold value for each iteration of filtration; and

computing a signal-to-noise ratio for each iteration of filtration; and

setting, by the processor, a filtering threshold value to the threshold value for an iteration of filtration with the highest signal-to-noise ratio among each signal-to-noise ratio computed for each iteration of filtration,

wherein, when the threshold value is incremented, the incrementing of the threshold value comprises:

incrementing the threshold value using a first value if a manual threshold setting has been previously completed; and

incrementing the threshold value using a second value if the manual threshold setting has not been previously completed.

6. The method of claim 5 , further comprising filtering the measurement signal based at least in part on the filtering threshold value.

7. The method of claim 5 , further comprising:

dividing the measurement signal into a plurality of samples;

determining if a frequency exists in more than a threshold number of samples; and

if the frequency exists in more than the threshold number of samples, removing the frequency from the measurement signal.

8. The method of claim 5 , wherein, when the threshold value is incremented, the incrementing of the threshold value comprises adding a constant value to the threshold value.

9. The method of claim 5 , wherein, when the threshold value is incremented, the incrementing of the threshold value comprises incrementing the threshold value by an amount that is proportional to a signal-to-noise ratio delta between two previous iterations of filtration.

10. The method of claim 5 , wherein the manual threshold setting comprises receiving an input of a manual threshold value.

11. The method of claim 10 , wherein the manual threshold setting comprises:

receiving a manipulation of the manual threshold value; and

presenting information about filtration results based at least in part on the manipulation.

12. A non-transitory, computer-readable medium having instructions stored thereon for a measurement system including a receiver and a processor, wherein the instructions, when executed, are configured to cause the processor to:

iteratively filter a measurement signal using a threshold value of a predefined magnitude for each of a plurality of iterations, wherein iteratively filtering the measurement signal comprises:

incrementing the threshold value for an iteration of filtration when a signal-to-noise ratio computed for the iteration of filtration is not a highest signal-to-noise ratio among each signal-to-noise ratio computed for each iteration of filtration;

filtering the measurement signal using the threshold value for each iteration of filtration; and

computing a signal-to-noise ratio for each iteration of filtration; and

set a filtering threshold value to the threshold value for an iteration of filtration with the highest signal-to-noise ratio among each signal-to-noise ratio computed for each iteration of filtration, wherein

the measurement signal is received by the receiver and is indicative of a parameter of a measured object, and

when the threshold value is incremented, the incrementing of the threshold value comprises:

incrementing the threshold value using a first value if a manual threshold setting has been previously completed; and

incrementing the threshold value using a second value if the manual threshold setting has not been previously completed.

13. The non-transitory, computer-readable medium of claim 12 , wherein the instructions are configured to cause the processor to filter the measurement signal using the filtering threshold value.

14. The non-transitory, computer-readable medium of claim 12 , wherein the measurement signal comprises a one-dimensional measurement signal.

15. The non-transitory, computer-readable medium of claim 12 , wherein, when the threshold value is incremented, the incrementing of the threshold value comprises adding a constant value to the threshold value.

16. The non-transitory, computer-readable medium of claim 12 , wherein when the threshold value is incremented, the incrementing of the threshold value comprises incrementing the threshold value by an amount that is proportional to a signal-to-noise ratio delta between previous iterations of filtration.