Dahua Dual Imager Dome Camera Tested (HDBW4231FN-E2-M)

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Rob Kilpatrick
Published Nov 07, 2018 15:23 PM

***** *** ********** * ****-****** **** model, *** **********-**-*, **** *** ************* positionable ******* ********* ********** **, *** found ** *********** ****-****** *******.

** *** *** **** *** ***** performs ** **** ***** ******, ** bought *** ****** *** **** **** against *****'* *** ****** ****** ******, examining:

  • ****** *********** ***********
  • **** ***** ******* ***********
  • *** ***** ***** ***********
  • ********* **********
  • *** ***********
  • ******* ******** ** ******

*******

** *** *****, *** ***** **********-**-* dual ****** **** *** ******* *** positives:

  • **** ***********:*** ******'* **** ******* **** **** to ******** *** ** ***** **** floating "*******" ******, **** ******* *** corridor **** ** ****** ***** *** shaped *****.
  • ******** *** *****/**:*** ***** *********** *** ******** ** past **** ****** ****** ** **** tested *** ** ********** **, *** found ** *********** **** ** ****** or *******.
  • ***** *** ***********:*** ****** **** **** *** ******* for **** ******* ** ********, *****, Genetec, *********, *** ** *******, ********** via *.*** ** *** ***** ******, and *.*** ** *******, *********, *** Nx *******.

*******, ** ******** **** ***** *** negatives, ** ****:

  • **** ** ********: *** ******* ********** ** ******** *********** the ****** ** *** *****, **** objects ** *** ***** ****** ***********.
  • **** *** ***********: *** *********** *** **** ******* ******** strong **** *****, **** *** ********** and ******* ******** ********** ****** ***.
  • *** ***** ************:*******, ** *** ***** ***** **** subject ******* **** ******, *** ******* objects **** ** *** **** ***** were *********** ** **** ***** *** far ***** ** *** *****. **** is **** ****/***** **** **********/** ************ but ***** ************ ******* *** ***** at ***** ****** ******.

***************

*** ****** **********, *** ***** **** dual ****** **** ** * ***** choice *** ***** ******* ** ***** odd ****** ** ****** ***** ***** may ******* ******** ****** ****** ******, due ** *** **** ***********, ********** IR, *** ***** *** *******, ** a ***** *********** ** *** *** cost ** *****, *** ********* **** one ***** *** *** *******.

*******

*** ***** **-***-**********-**-* ******* ****** *** ~$*** USD. **** ** ************* ***** **** competitive **** ****** ***** **** ** the *********-******(~$*** ******) *** ******* ********* *** (~$700 ******).

**** ******* ** ******* ** *** compact ** ***** (********* ~$*** ****), though ******* *** *** ********* ** reduced **** ***** *** **** ****** camera.

Competitive *******

**** ****** ****** ******* *** ***** relatively ****.*******'* ********* ***,******'* ***-******, *******'**** *********** *********. ******* *** ******* ******* several ******* *** ********* ** ***** and ******, **** ** ****** *********** (4 *** * **), ** *********** audio, *** */*. *******, ***** *** Hanwha ****** *** **** ****** ********* and **** ******** **** ******.

Physical ********

*** ***** **********-**-* ** ******* ** **** to ****** ****** *****, **** **** 5" ** ********, **** *** **** difference ***** *** *** ***** ***** instead ** *** ****** ***. **** can ** **** ** *** ********** to * ******* ***** ****** ****** dome *** ****** *****:

similar size to single imager domes

**** ****** ** ************** ** * axes ***** ** "*******" ***** ******. Camera ****** *** *****, **** ** varifocal ******* *** ** ***** ******* aside **** *.*** (***° ***) ** North *******. * ******** **°/*.*** ****** is ********* ** ***** *******.

***** ** ****** *** ******'* ******** features.

Open ****** *******

** ****** *** ****** ** ** open ****** **** ~**' ****, **** both ******* ******* ******** ** **** other, **** *** ****** ****** **** of ****** ** *** **** ****** area, ******* *** *** **** *****.

**** ************* ******* **** ***** ** the **** ****** ****, **** **** exposure **********. *******, ***** ** * notable ***** **** ******** ***** *** camera (** *** ****** ** *** floor ****), ***** ***** *** **** to ***** **** * ******** ****** if *******.

Entry ****/******* *******

****, ** ****** *** ****** ******** an ***** ********* ** **** ** a ********* *******, **** *** ****** set ** ** ******** **** ****** fit *** *******. ** **** *****, exposure *** ****, **** *** ******* fully *******, ********* *** **** ******** below *** ******. *** ****** ***** toward *** **** **** ******* ******* the ***** *** ***** **** ****.

Image ******* **********

******** ** * ******** ***** ***** dome, *** **** ****** **** ******** similar ******/***** ******* ** **** *****, with **** ****** ************ ** *** subjects **** ** ~* ****.

day performance comparison 10

** ***** ** ***/~**', *********** *** again *******, *** ****** ******* ************* reduced ** **** *******, **** **** rough ******* *******. ****** **** *****, detection ** ****** ********, *** ************** is *** ********.

day performance comparison 20

Dark ***** ******* (

** **** ****** **** ** **, details *** ****** ** ***** ***** (~10'/~70 ***) ** *** **** ****** camera, *** ******** **** ** *** single ****** ****, **** ****** ***** legibility ** *** **** ****** **** (line * **. **** *)

dark performance comparison 10

******** *** ******** ** ~**' (~** PPF), **** ****** ******* *** ***** available ** *** ********** ***** **** *** lost ** *** ****** ****** ******.

dark performance comparison 20

Poor ** ********

** ******** ** *** ********** *** poor, ******** ************ *** ****** ** the ***** ***** ******* *** ***** dark, *********** ******** ******* ** *** subject *** *****.

weak ir at edges of imager fovs

************, ** *** **** ****** ******'* specified ** ***** (***/~**'), ************ ** weak, ****** ********* ** ********. ** contrast, *** ****** ****** ***** **** not ******* ******* ** *** ******* at **** *****.

weak ir illumination at spec range

Low ***** ***** *******

*******, ** *** ***** (~* ***) and ****** **** ***** ****, *********** was ********** ****** ** *** **** imager ******, **** ******* ******** ******* in *** ****** ****** ****, ****** both ******* ********** **** ** *** test *****.

night color performance comparison

WDR ***********

*** *** ****** ** * ********* setting **** ** ******** ****, **** lux ******* ********** *** *** ** cloud ***** ~*,*** ***, **. ~** inside.

wdr test field of view

**** ******* ********* ********* ** **** scenario, **** ****** ******* ********** ***********, though *******, ******* ******* *********, *** clearly ******* ** *** ****** **** beside *** ****.

wdr comparison

*********

********* ** *** *** ***** **** imager *** ******* ** *** ****** imager ****** ****** *** ***, *** noticeably ****** ** *****. ******** **** comparable ** ******'* ***-****** **** ****** camera, ****** **** **** ***** ******** integrated **, ***** ****** **** ***. Measurements **** ***** **** ******** ****** in *** *****, **** ***** ****** on.

bitrate comparison

Broad *** ***********

*** ******* *** *** ********** *** broad, **** **** ******* ********** *** streaming *** *.*** ** *** ***** tested. *******, *.*** ********* *** *** supported ** ******** ** *****. ****** VMD ****** ** *** ***** ****** Avigilon. *** ***** ****** **** **** once ******* ******* *** **** *******.

Versions ****

*** ********* ******** ******** **** **** during *******:

  • **********: *.***.*******.**.*

*** ********** ** **** ** *****.

Comments (5)
U
Undisclosed #1
Nov 08, 2018
IPVMU Certified

*** ***** ******** ***** ******* *** each ******?  

UM
Undisclosed Manufacturer #2
Nov 08, 2018

***!

Avatar
Abaas Mahroos
Nov 08, 2018
Al Aswar Trading Group • IPVMU Certified

** ***** *** **** ********* **** fixed, ** ***** **** *** **** to **** **** ** ***** ************ development.

(1)
Avatar
Jason Thomas
Mar 02, 2019
IPVMU Certified

* **** * **** ** *** of *****, *** * ******* *** same *****. **** *** ***** ******* as *** ***** ** ***** ****. They *** ** ********** ***** *** forward. ***** **** **** ***** ****. Now * **** **** **** ** Glasses.

(1)
LZ
Lee Zanter
Sep 18, 2019
IPVMU Certified

* **** **** **** ** * little *****. *** * ** ****** to *** ****** ** **** **** Exacq ***. ** * *** ** via ***** *** * **** *** 1 ******, *** * ** *** motion ** **** ******. ** * add ** *** ***** * *** both ****** ******* *** ****** ** get ******. ** ***** ********* *** guys *** ** *** ****** ** work **** **** *******? ** ** could *** **** ** **** *** did **** ****** **** ** *****? This ** *** ****** ***** ***** Ip ****** ************. ***** **** *** guys **** **** ** *** **** to ****.