Simon Willison’s Weblog

Wednesday, 19th October 2022

Measuring traffic during the Half Moon Bay Pumpkin Festival

This weekend was the 50th annual Half Moon Bay Pumpkin Festival.

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Simple, Fast, and Scalable Reverse Image Search Using Perceptual Hashes and DynamoDB. Christopher Bong provides a clear explanation of how perceptual hashes can be used to create a string representing the visual content of an image, such that similar images can be identified by calculating a hamming distance between those hashes. He then explains how they built a large-scale system for this at Canva on top of DynamoDB, by splitting those strings into smaller hash windows and using those for efficient bulk lookups of similar candidates. # 3:04 pm

2022 » October

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