Is there any heuristic method to find metrics, similarities between two signals? I am not talking about correlation.
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1Correlation reveals the linear relationship between two signals. Since you already excluded correlation, what relationship are you then looking for? – Dan Boschen Nov 21 '21 at 20:06
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**Correlation** is a **waveform** based similarity measure between signals. And it's very a low level comparison. However, depending on the signal type and application domains, there are different (high-level) interpretations of the term *similar* as well. For example, topological similarities are computed during object-image recognition tasks... Such as morphological similarity between a base object and its morphed versions. – Fat32 Nov 21 '21 at 20:46
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4Does this answer your question? [Comparing multiple signals for similarity](https://dsp.stackexchange.com/questions/54970/comparing-multiple-signals-for-similarity) – Marcus Müller Nov 21 '21 at 22:25
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@DanBoschen I am looking for measuring the total amplitude, time-shifts, and waveform differences. – Blobmou Nov 22 '21 at 08:53
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@Blobmou what you describe is a correlation. No matter how little you like that. – Marcus Müller Nov 22 '21 at 10:33