KAPLAN’S CORNER

Corner validation based on extracted corner properties

We developed a method to validate and filter a large set of previously obtained corner points. We derived the necessary relationships between image derivatives and estimates of corner angle, orientation and contrast. Commonly used cornerness measures of the autocorrelation matrix estimates of image derivatives are expressed in terms of these estimated corner properties. A candidate corner is va...

Strongly nil-clean corner rings

We show that if $R$ is a ring with an arbitrary idempotent $e$ such that $eRe$ and $(1-e)R(1-e)$ are both strongly nil-clean rings‎, ‎then $R/J(R)$ is nil-clean‎. ‎In particular‎, ‎under certain additional circumstances‎, ‎$R$ is also nil-clean‎. ‎These results somewhat improves on achievements due to Diesl in J‎. ‎Algebra (2013) and to Koc{s}an-Wang-Zhou in J‎. ‎Pure Appl‎. ‎Algebra (2016)‎. ‎...

Measurements Corner

This paper describes a statistical signal-processing method for exploiting narrowband bistatic RF measurements to detect and track moving people (hereafter referred to as "dismounts"). In our approach, RF measurements are made by a constellation of narrowband radar units, arranged around a surveillance region. There are several benefits of narrowband radar in this application, which we describe...

Radiology corner

Poet's Corner

(1) MICHAEL LENNARD 1923-1986 In his Obituary to Michael Lennard printed in our August number Donald Ratcliffe referred to his love of art and literature. He was a brilliant parodist and we reprint below with kind permission two excerpts from a contribution he made as a student to the 'Black Bag'. The theme was 'hernia' and readers will recognise echoes of Browning's 'Home thoughts from abroad'...