Facial-Recognition Software for Animals Remains Primitive

choi

Supplement to MY Posting 'Marine Radar'

(1) Babinet's principle

The Note (3)(c)(ii) was
Anshul Kogar, Diffraction, Babinet and Optical Transforms. This Condensed Life (name of Jogar's blog), May 21, 2016
https://thiscondensedlife.wordpr ... optical-transforms/
("To get an idea of what this means, let's look at an example")

Why?

Jessie Segal and Alyssa Cedarman (two undergraduates under then associate professor Dan MacIsaac),  Diffraction with Hair or Wire. Buffalo State College (part of SUNY), undated
http://physicsed.buffalostate.ed ... 09/Young/Young.html
("This is a variation of Young's Double Slit, in which light goes through two thin, parallel slits. When light goes through, the light will diffract, or 'bend.' When light touches the edges of the slit, it is treated as a new source of light, as described by Huygen's Principle")

Take notice that, depending on the distance of the screen from the "opaque body,' (quoting Babinet's principle), the area directly behind the opaque body may be the brightest.

(2) slit module:
(a) module (n; Latin [noun masculine; diminutive of modus measure] modulus [a small measure] ):
"any [which is not necessarily identical to one another] in a series of standardized units for use together"
https://www.merriam-webster.com/dictionary/module

Slot module discusses an individual slot.
(b)
(i) Slotted Waveguide Antennas. Antenna-Theory.com, undated.
www.antenna-theory.com/antennas/aperture/slottedWaveguide.php

Read the second half starting from the sentence: "Radiation occurs when the currents must 'go around' the slots in order to continue on their desired direction."
(ii) Roland A Gilbert, Chapter 9 Waveguide Antenna Arrays.
ftp://doc.nit.ac.ir/cee/communic ... 071546855_ar009.pdf
(A) Read caption of Figure 9-1 only.
(B) Roland A Gilbert, Chapter 9 Waveguide Antenna Arrays. In John L Volakis (ed), Antenna Engineering Handbook. 4th ed. McGraw-Hill, 2007.
www.gbv.de/dms/hebis-darmstadt/toc/188425322.pdf

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Yifang Wang, Facial-Recognition Software Meets Its Match: Farm Animals; Cows, pigs kick up fuss at photo tie; Hard to tell a donkey to stand still. Wall Street Journal, May 1, 2019 (front page).
https://www.wsj.com/articles/fac ... animals-11556633879

Quote:

(a) "Developing reliable facial-recognition software depends on getting clear, well-lit and straight-ahead images.

"No one told the farm animals.

" 'There were pigs biting and dragging on my clothes,' says Deng Changshun 邓昌顺, chief executive of a Beijing-based developer of animal-recognition software, called Innovationai Co 翔创科技（北京）有限公司 [2017- ]. 'Others were attacking me with their snouts.'

(b) "Unfortunately, cow and pig faces aren't so easy to tell apart with software originally designed for flatter human faces. * * *

(c) "For better results, technicians recommend adding side profiles of animals which have more distinguishing depth and features than those of humans. * * *

(d) "The limited database of available animal faces, which companies say numbers in the hundred of thousands -- compared with millions for humans -- slows the pace at which computers can lea5rn. Hence the messy and frustrating effort to collect more animal portraits.

My comment:
(a) The report did not say where it is dispatched from. But the fact that many interviewees are based in Beijing suggests that the reporter is based there, too.
(b) The report is locked behind paywall. There is no need to read the rest, though.