Examples

• Demo to use the Stretcher object
  • Table of content
  • Modules and parameters
    • Modules
    • Parameters
  • Case 1 : Find the best stretching between a reference and another signal
    • Step1 : Generate the reference and stretched signals
    • Step2 : Pre-compute the stretched versions of the reference
    • Step 3: Correlation of the observed signal with the reference
    • Results
  • Case 2 : Find the stretching history in a b-scan using a single reference
    • Step 1 : Generate a b-scan with varying stretching as a function of time
    • Step 2 : Pre-compute the stretched versions of the reference.
    • Step 3 : Correlate all signals of the bscan with the reference
  • Case 3 : Find the stretching history in a b-scan without any reference
    • Compute the stretching and correlation matrices
  • Case 4 : Iterative approach : Inverse stretching
• Application to noise correlation functions
  • A test to show that the stretcher works exactly the same way for positive/negative times
• Strecthing based noise monitoring in the context of High noise variations
  • Parameters
    • Generate the centroids correlation functions for each source environment
    • Generate the expected strething history $ :nbsphinx-math:`varepsilon `^{true} (T) $, continuous in time.
    • Generate the source variation history.
    • Generate the noise correlation functions, add random noise.
    • Perform stretching measurements
    • title
  • Clustering approach to separate the noise environments
    • Using the clustering matrix to weight the stretching measurements
    • Inversion to adjust the constant terms of each cluster