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

Are there separate ONVIF streams for each imager?  

UM
Undisclosed Manufacturer #2
Nov 08, 2018

Yes!

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

If those two lens positions were fixed, it would open the door to some cool 3D video surveillance development.

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

I have a demo of one of these, and I thought the same thing. They are about exactly as far apart as human eyes. They can be positioned fixed and forward. Might make nice robot eyes. Now I just need some 3d Glasses.

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

I know this post is a little dated. But I am trying to get motion to work with Exacq VMS. If I add it via dahua API I only get 1 stream, but I do get motion on that stream. If I add it via ONVIF I get both camera streams but unable to get motion. Is there something you guys did to get motion to work with both streams? If so could you tell me what you did when adding this to Exacq? This is not listed under Exacq Ip camera integrations. Looks like you guys were able to get this to work.