for confounding your name with Victor’s!
Well, even after having been pointed to OrientationJ, Victor writes
I’m using Fiji to get more installed plugin, and even using Fiji I didn’t find an installed “Harris corner detector” feature… :-/
and from a certain point of view I can understand his wish.
OrientationJ is quite an impressive and corpulent piece of software and actually overkill if one only needs the Harris operator. With this in mind, writing a small “Harris”-macro or -plugiin could nevertheless be worthwhile.