## Tuesday, February 22, 2022

### Ruminating on Fourier Transformation

In my AI learning journey, I had to refresh my understanding of fourier transformation. The following video on YouTube is hands-down the best tutorial for understanding this maths concept.

Fourier transformations are used in AI Computer Vision models for usecases such as edge detection, image filtering, image reconstruction, and image compression.

## Wednesday, February 02, 2022

### Fuzzy matching of Strings

Quite often during document processing or email processing tasks, we need to compare strings or search for keywords. While the traditional way of doing this would be using String comparison or RegEx, there are a number of other techniques available.

Fuzzy matching is an approximate string matching technique that is typically used to identify typos or spelling mistakes. Fuzzy matching algorithms try to measure how close two strings are to one another using a concept called as 'Edit Distance'. In simple words, 'edit distance' can be considered as the number of edits required to make both the sentences same. There are different types of edit distance measurements as described in the Wikipedia article above.

TheFuzz is a cool Python library that can be used to measure the Levenshtein Distance between sequences. The following articles would help you quickly grasp the basics of using the library.

https://www.activestate.com/blog/how-to-implement-fuzzy-matching-in-python/

https://www.analyticsvidhya.com/blog/2021/07/fuzzy-string-matching-a-hands-on-guide/

https://towardsdatascience.com/fuzzy-string-matching-in-python-68f240d910fe