Hacker News Reader

This is cool!

I'm curious about which perceptual hashing algorithm is being used. The README says it's "invariant to scaling and rotation" but the approach described in the linked paper is highly rotation-sensitive. (EDIT: it looks like the implementation can handle multiples of 90 degrees, which is a bit better than I thought at first)

View on HN

Thanks! :)

I've added a bit of documentation for the `all_orientations` parameter on POST /search and clarified what we mean by "rotation". By default, Match search for all 90 degree rotations of the given image. We're open to improvements on the hashing algo which would make it more flexible at the expense of accuracy when provided a flag.

Reply on news.ycombinator.com