Tamper Detection Shootout - Avigilon, Axis, Dahua, Hanwha, Hikvision, and Uniview

By Rob Kilpatrick, Published Feb 22, 2021, 09:09am EST

IP cameras have claimed to detect tampering for years, but how well do they really work?

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To find out, we tested tamper detection on six manufacturers: Avigilon, Axis, Dahua, Hanwha, Hikvision, and Uniview. Inside, we examine:

  • The critical false nuisance alert issue all manufacturers suffer from
  • How well does tamper detection detects lenses being covered?
  • How much of the field of view must be covered to trigger alerts?
  • Do cameras alert on sudden field of view changes?
  • Does tampering detection shaking, fogging, or liquid droplets?
  • Do tampering alerts integrate to common VMSes?

*******

***** ** *** *******, tamper ********* *** ************* flawed ** *** ******* tested *** **** ****** to ******* *********** ******* of ******** ****** ** the *****.

***** *** ******** ******* when *** **** *** covered (*.*. **** ****, cardboard, ***.), **** **** alerted **** ******* ******** from *** ** ***** mode, **** ** ******** changes ******** ** ******* these ******** ******.

**** *** ****** ******* an ****** ** ****** alerts **** **** ****** which ********* ***** ***** alerts, *** **** **** prevents ****** ****** **** triggering **** *** ****** is *******.

****, ********, *** ******, and ******* ******* **** the ***** *** ******** changed, *.*., ******** ******* out ** ********, ***** Hikvision *** ***** *** not, ***** *** ****** but ******* ******* **** cameras **** ******.

*******, ****** **** **** partially ***** *** ******'* field ** ****, **** as ***** ***** ****** or ******* ** ******** only ********* ****** ** Uniview. **** ** ** advantage, ** ***** *** be ******* ** ****** affecting ***** *******, *** is ****** ** ******** nuisance ******, ** ****.

Other ********* *********

**** **** ******* **** on *****-** ****** ********* functions ***** ** *** require ***** *******. **** manufacturers ******* ******* ****** functions *** ********, **** as ********** ***** ********* supported ****** * *************** ******* * ***********, *************** ********** ********* *** some **** *****. *******, ***** ******** are *** ******, ***** tamper ********* ** ****** universally ********* ** ** cameras.

All ************* ****** **** *******

** *** *****, *** manufacturers ****** ********* ******* when *** **** *** covered, *** *** ****** of *** ***** ***** needed ** ** ******* varied.

*********, *****, *** ****** required *** **** ***** to ** ******* *** a ****** *****.

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****** ********* ******** * sensitivity ********** ***** ***** detect **** **** ** the ***** *** *******, down ** * ******* of ~**%.

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Avigilon, **** ~**% ** ***** ******* *** *****

******** *** **** ******** ~50% ** *** ***** to ** ******* *** a ****** *****, **** no ******** ***** ***** smaller ******* ******* ** trigger *** *****.

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Uniview ***** **** ~**% ** ***** *******

****** ****** ********* ******* when ~**% ** **** of *** ***** *** covered, **** ********* ** all ****** ******.

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False ****** ** ***/***** ******

*** ************* ********* ****** detection **** ****** **** turned *** ** *** room ** ****** **** cameras ******** ** ***** mode, * ***** ********** as **** ******* **** are***/*****. ***** ****** ******** regardless ** ******* *** event *** ******* (****** turning ***) ** **** a ****** ** **** (daylight ******* *** *** camera ********* ** ***** mode).

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**** *** ****** ******* options ** ***** ***** false ******, *** **** enabled *** ******* **** missed ***** ****** ****** when *** ******'* **** was *******, *********** ****** tampering *******.

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Axis, ******, *******, ******** ****** ***** ** ***** ******

****** ***** *******, **** as ******** ******* *** of ********* ********* ****** alerts ** ****, ******, Avigilon, *** *******. **** did *** ******* ********* in ***** ** *********.

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Uniview *** **** ****** ***** ** ****** ** *****

****** ******** **** ***** to *** ******* ****** triggered ********* ****** ** they ******** ** *** field ** **** *** a *** *******. **** that ******** **** ********* be **** ***** ** the ****** ** ******* this, ** **** **** fill >**% ** *** field ** ****, ***** here:

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*********, **** ********* ********* alerts **** ****** ******** long ****** (>** ******* by *******) **** *** camera, ***** ****:

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Uniview ****** ***** ** ****** *******, ***, ***** ********

******* *** *** **** Manufacturer **** ********* ********* alerts **** *** ****** was *******.

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**** **** ***** **** and ****** *** *** detect ***** ****** ***** Tampering, **** **** ***** some ****** ***** ******* shock ********* (******* '****' *****-*** *** Camera *************** ******* * **** PTRZ ******).

************, ******* ******* **** camera ***** ****** ************* fogged, ***** *****, ***** all ****** ******* **** issue.

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*******, ******* *** *** only ************ ** ******* tamper ****** **** *** camera's *** *** ******** by **** ********/*****. **** may **** ***** ** potential ******* ******, *** depending ** ************, *** also ******* *********** ******* of ******** ****** (*.*., cameras ******* ******* ******* sunshields, ******* ** ***** precipitation).

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VMS ***********

*** *************' ****** ****** integrated **** ********* ********. Axis *** **** ******* supported, ********** ** *** VMSes *** ******** ******* Center, ***** ******* *** supported **** ** *********.

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*****

****** ********* ***** *** simple ** *** ************* tested, ********* ********** **** of ** **/*** ******. Axis *** ****** ******* an ********** ****** ** ignore **** ****** (****** this **** ******* ***** tampering ******), *** ****** has ** ******** *********** setting.

** ****** ***** *** each ****** ** **** video:

Versions ****

*** ********* ******** **** used ****** *******.

  • ******** *.*-***-***-**: *.**.*.**
  • **** *****-***: **.*.*
  • ***** *********-***: **.***.*******.*.*, ***** Date: ****-**-**
  • ****** ***-******: *.**.**
  • ********* ***********-****: *.*.** ******
  • ******* **********-***: ************-*************

Comments (47)

*** ********** ** ***/***** switch ** ******** ** me *** ***** **** a **** *********. ******'* a *** ** ** simple ** *** ****** telling ****** "***'* ******* on **** ***** ****** that *'* ********* ***** to ******" ** **** disabling ****** ********* *** 5 *******?

**** *****. * ** wondering *** ****, **** send * ******* / message ****** *** ****** informing *** ****** ******** to *** ******* ****** X ******* ** *** day/night ****** ***** *********.

* *** ********* *********** **** **** ********* equipment. ********* ***** ** tell ** ** *** just *** ******** *** that *** *****. **** then ***** ** ***** the *-****** ***. **** they ******* **** ** that **** *** "******* as ********" *** ******'* be *****. *** **** solution ** ***** *** for *** ***** ** leave *** ****** ** in ***** ***** *** the ****.

*** **** **** ********* all *** *** ** to **** **** **** same ***** ***** ** there *** **** **** serious ******** **** ********/******** development ** *** ******** as * *****. **** no *** ******* **** actually **** **** ***** before **** ******* **?

*********/********* ** * ******* problem ** **** ***** where ******* *** ******, generally ***** *********** **** spray ***** ** ****. You *** **** *** exact *** ***** ** to **** *** ********* time ****** ** ***** the ****** ** ****** between *** *** ***** in * ******-*** ********; beyond **** **** ** the ***** ** *** restored, **** ** ******** the *****. ** ********** blows ** **** **** so **** ******* *** their ************* ****** ****** this ***.

******* *** ****** ***** store *** ****** ** memory, *** **** ** its *** *** ***** image **** ** ****** is ********. **** ******* darkness ** ****** ***** which ** *** ******** to ** *********, ** waits *** (********) ********* time **** ***** ** image ****** ** ********, and * ****** ********* compares *** *** ***** to *** ** *** reference ****** ** ****** they ***, *** "****** parameters". ** ** ***** does *** ******* ** time ** *** ***** is *** *** *** of ********** **** *** reference *****, **** ** triggers *** *****.

*'* **** *** ********* AcuSense *** * ******* have ******** ** **** regard *** *****'* *** a ****** ** *** some. ********* ***** **** saved *** ****** * whole *** ** *** false ***** ***** ***** from *** ********** *******.

**** ** *** ******* IPVM ******** **** **** stuff ****** **** ******* it?

* ***** * **** amount ** ****** **** IP ****** ****** ********* does *** ****** **** well ** ********** *** it's **** ** ** a ********, *.*., "*** we ** ****** *********".

*** *** *** ** so ****** (** ** it ***** ****). *** can **** ***** ** a ******* ** ****? Manufacturers, *** **** * lot ** ****** ***.

******* ** *** ***** about ****** ********* **** we **** **, ***, behaviour ******** *** ****** in *** ********...

** **’* *** ** the ****** ******* **** you’re *** **********, ***’** reacting ** ** *****. Lots ** ***** ********** out ***** ** ******* ‘tamper’ ** ***** **** via ********* *** **** inputs/outputs

**** ** ***** ********** out ***** ** ******* ‘tamper’ ** ***** **** via ********* *** **** inputs/outputs

****, *** ** *** camera *** **** ** reliably ****** ** ** was ******** **** **** would ** ******* *** cheaper **** ******* **** inputs/outputs, ***/**?

********* ** '******' *** the ***** ****** *** it ***** *** ** in ***** ****... ** may ******* * **** at ***** *********, ** ontop ** * ***** as * '***-******' ***** - ***** ***** ** a ***** ******* ** meanings ** *** **** 'tamper' *****?

** * ******** ************, im ****** ******* *** speed ** *********....*** ** its *** ** *** point ** ******* ******** out *** ****** *** too **** - ** course ***** **** ** different.

***** ******* ****** ***** be ** ******* ** alert ** ***** ** no ******** ****** * timeframe (********** ** ****/****** scenes)

***** **** ** ********* but * **** ***** felt **** ****** *** been ** **** ***** in *** ******* ***** as ***** ** *** many ********* **** **** an ***** ***** ****

**** ** **'* ** area ***** ****** ***** present ** *** *******? What ** **'* ******* at * ******, * sidewalk, * ******* ***, etc.? ****** ***** ******* would ** ******, *** not ****** ** ******* an *****, *** *** camera ******** ******** ** being ******* ***** **.

* ***** **** **** you're ****** ** ******* fields ** ****, **********, high ******** *****, ***. But **** ** ***** cases, **** ** **** beam ** ***** ****** fails? ******'* *** ***** like ** **** ** someone **** ** ************** ******* *** ****** out ** *** **** or ******* **?

*****, ****** ** **** generic. ** ***** ** better ** ****** *** those ************. ** ***** is ** ****** ****** it ******** ******* ** possible.

* ***** * ******** a **** **** *** that *** ***** ***** is ** '*******' ******, or *** *** ****** you're ***** ** *** false *********.

**** ******* ** *** camera *****, ***, *** etc **** **, ***** are ********* ** *********

**** ******* ** *** camera *****, ***, *** etc **** **, ***** are ********* ** *********

*****, **** ****** ********** when **** ***'* **** a **** ***** *** particular ******* ****** ** hand. ********* ******* **** separate ********* *** ***** loss ****** ******.

*** ** **** ****** and **'* ******* *** people ****** ******* *** why * ******* *****'* work ** ********. ************.

***** *** *** **** input '*********** ********** #*'. very ***** ** ***.

******* * **** ******* about ********... **** *****.

*******, *** ********. *** know *** ***** ********, you **** *** **** an ***** **** *******.

**, **. ***** *** don't **** ***** ***** features *** ****** ******* how ** ** *** are ******** ** **** with ******** ***** ******** cameras ** * ****** apartment ******* ****? *** for *** ******, **** exact ******** ***** *** in **** ** ** clients' ********* (******* ******** trying ** *****, ***/** druggies ******* ********* ** shoot **).

*** ***** *** **** involves * ************ ****** client **** *** ******* being ****-********* ** **-**** security ******. **** * manufacturer ********** * *******, my ****** *** * expect **'* ***** ** do **** **'* ********** to **.

** *** **** *****... #2

** *********** ** ** a ******** ***** ** 'supposed ** ****' *****'* work **** **** ** you **? *** **** with **** *** *** do! * ******* *********** were ******** ** ** problem *******?...

**** *** ***** *** suggest ** **** ****** a ************ ******* ****** than * ************* *******?...**** them ******* ** ****** they *** ** **? door ****? ****** ******* on *** ****? ***** a **** ******* ** trigger * ****** **** to ** *****? ** there ******* ***** *** happening? ** ** *** it ** * ********...

***...

*** ******. *** *** ASSuming **** ** ****'* offer ***** ** *** client *** **** **** were ******** ******* ** was *** ** ***** budget.

********* ***, *** ***'* have * ****. **** John *** ***** ***'* agree **** ***. ****'* the ***** ** **** continued ***** ******** ****? And ** *** **** to **** *** ********* game **** * ******** baby, ***'* *** ** on. * *** ******** far **** ** **** posts **** *** *** mine ** *** **** your ******.

*** ** *** **** to **** *** ********* game **** * ******** baby, ***'* *** ** on. * *** ******** far **** ** **** posts **** *** *** mine ** *** **** your ******.

*** **** ****** *** the *** ** *** bank?

*** **** **** * second ****.....**** **** ** personally, **** ** * post **** * ****** about *** $******** **** bring ** ******** *** still **** ** **** through *** *** **********, but * **** **** it *** **********, **** he *****'* ** *** of **** *** *** money. * ***** ** may ** ***** **** well ********* ***** ******'* money ** *** *** job ** ** ** just ************* *******. ** has ** **** *** any ** *** ********* profits ***** *********** *****. And *'* ***** *** 100% **** ** ******, much **** ** *** bank. *** * ** find **** ** *** articles ************. **, **** to **** ********* ******.

* ******* *** ***** out ** ******?

* ** ****** ****** to **** * ********** but * ********** *** you’re *********** ***, *** are **** ****** *** some ****** *** *** have * **** ******** by ********* ******. *********** with ****** **** *** refund (***** * ****’* know ******* ***** *** mentioned), ****** ** ******** them ** ****** ** opinion *** ****** ** suggest *****, **** ***** is *** ***********...** **** the ******** ****** *** to *****, **** ** ideas...not ** ** ** online *****.

* ** *** *** you ******* **** ********** so **** ***** *** to **

******* ** *** ***** about ****** ********* **** we **** **, ***, behaviour ******** *** ****** in *** ********...

***, ****'* ********** *** I ***** **** ******* a "************" ******* ***** insulting, ************, ** ***************. Don't *** ** **** this ** ** ***** some ****** ***** **** that ******** *** **** opening **** **** *** thread.

****, ***** ********, ****** and ********** ***** (** charge * ****** **** in "*******" ************) *** be *** ** *** budget, ********** **** *********** protect ******* **** ***** evicted *** *** ****** their ****. *** ***** what, ***** ** ** protection *** ******** ******. Then **** ***** ***'* just ********* **** **** your ******* ** **** security ****** *** *** disappears ***** *** ****** to *** ********* ** put **** ** **** family's *****. **** ** nice ******* **** ********** piece ** *** $********.

****** **#*, *'* **** someone **** **** **. I **** * ***** have ***'* ******* **** their *****-******* ****** ********* but ****'* *** ** reality. **** ** ** clients **** ***** *********** problems **** **** ** their ******* *******, *** investing $*** **** * camera *** *** ** a *** *** *** them. ** **** *** particular ******'* **** *** cameras ************** **** ********** improvements ** *** ********'* safety *** ******** *** he ***** *** *********** was ******* ***** **. However ** *** ***** buildings **** ******* ******** but *** ****** ** severe, *** ** ****'* moved ******* ** *** installs *** *****. * don't **** *** *** is ** ******-****** *** oblivious ** *** ***** beyond *** *** ****** of *********.

* **** * ***** have ***'* ******* **** their *****-******* ****** ********* but ****'* *** ** reality.

* ** *** ******!

**** **** ******** ****** much ********** ****! **** grief.

****...* *** ** ********** for *********** ****** ** years ***** ****** ****** over ** *** **** side.

***** ********** - ****** alarm ‘******’ **** ** advertised ** *** ************ but ** *****’*.

***’* ***** ** ******** on **** ** *** above *** ****’* ****, it’s **** ****** *** discussions *** ***

******, *****.

***

*** *** *** ** so ****** (** ** it ***** ****).

** **** * ***** like ** ****-** ****, the ***** ** *** fix ** ****** *** “so ******”, ** *** point *** ******** *****.

****, *** ***** ****** have *** ****** ****** tamper ****** ***** ***** a ***/***** ******, *** do *** ****** **** to ** ****?

******** *** ***** ** the **** ***** ** the ***** *** ***** paints *** ****. *** an *********** ********. ** tamper ***** ******* ***/***** switch.

**, ** **** ** either ** ********* **** what *** *******, **** reference ****** **** **** the **** **********, ** try ** ********* ** the ***** ** ********* the **** ** *** color ******* **** ** just *** ** *** b/w *****.

**** ** *****, (** maybe ********* ******), *** not ******* ****** ***********, **** ** **** seem **** ** ********.

*** *** *** **** clear *** **** ********* like *** ********* ***** would **** - *** seem ** ** ******** on **** ****** ***** that ** ********* *** same ***** *** ** the ******, *** **** is *** * ***** assumption *** *** *****.

****, *** ***** ****** have *** ****** ****** tamper ****** ***** ***** a ***/***** ******, *** do *** ****** **** to ** ****? ******** guy ***** ** *** room ***** ** *** light *** ***** ****** the ****. *** ** unthinkable ********. ** ****** alert ******* ***/***** ******.

** *** **** ****** the ****** ****** *** a *** *******, *** probability *** ****** **** turn *** *** ****** and *** ** *** camera ** * *** seconds ** ***..****, **** if ** *** ******* with * ***** **** here, ** **** ***** star ***** ****** *** camera, ** ***** ***** go *** * *** seconds ***** **** *** timer ** ****** *** tamper ***** **** ***.

****, **** ** ** are ******* **** * track **** ****, ** said ***** **** ***** paints *** ******, ** would ***** ** *** a *** ******* ***** once *** ***** ** ignore *** ****** ***** runs ***.

**** * ***** **** would ****** ** *** the ****** ***** ********* is *******. ** *** think ** ********** ****** statically ***** ** *** image?

* ***** ** ********** tamper ** * ******/ after **********, ***** ** the **** ****** *** day/night ****** ******** **.

** *** ** ****** by ********* *** ****** while *** *** **** booting ** *** ** it ****** **** ** alert.

*********'* ****** ***** ***** work ********* **** ** the *** **** ********* time *** ****** **** A *** ******* ******. Tell ** *** ****'* not ** "**** ***" to *******. ** ***** suggestions ***** ********* ******, etc. *** ********* **** complicated *** ** *** had **** *** ****** I'd ****** ** *****, you'd *** **** * few ******* ****** ********* time *** *** **** was ****** ** ***** the *******.

** *** *** **** the ****** *'* ****** to *****, ***'* *** that * *** ******* longer ********* **** *** all **** *** ****** to ***** *** *******.

****** * *** **** the ******, *** * still ***** ** ** statement. ****, **** “*********” time ***** **** *****************, ***** ******.

*******, ** ************** *** ******* ** real ******, *.*. ***** painting *** ********** *** *** ***** transfer.

** **** **** *** unscrewed *** ***** **** and **** ***** ******* the ******, *** ****** time *** **** ***** would **** ********* * tamper *****.

** ** ***** *** have. ** *** ***** didn't ******* ***************** *** ******* ********* time, * ****** ***** would **** **** ****.

***'** **** ****** *** perps ** ******* **** with * *** ** credit. **** ** **** are **** **** ***** nor ** **** **** the **** ** ** given *** ********* **** lead.

** ** ***** *** have. ** *** ***** didn't ******* ** ********* within *** ******* ********* time, * ****** ***** would **** **** ****.

***, *** ** ***** have ******** ** *********, like * ***** ***** darkened *****.

*** ** ***’* ******* tamper ****** ** *** compare ** ** *** same *****,** *** **** ********.

***** *****’* ***** ** you *** ********* *** frames ****** *** **********.

****** ********* ***** ** sensing * ******* ****** in *** *****. ********* of *** ***** (******* through ***** ** ******) or *********** ** *** image (* *** **** you * ***** ** that *** ***** *** cops ***** * ********** at *** *** ********* the ******). ** *** shut *** ****** *** and ***** ***** *** camera, *** ** **** any ********* **** ******* the ****** ** *** spray ******** **? *****, four, ** *** ******* later **'* *** ***** to ** *** **** scene ** ****** *** the ****** **** *******.

* ***** *** ****** go *** ******** * Hikvision ****** *** ******** use ** ****** ***** much ******* ** **** conversation.

* ***** *** ****** go *** ******** * Hikvision ****** *** ******** use ** ****** ***** much ******* ** **** conversation.

* **** * *** camera ** ****, *** problem ** * ***’* test **** “********* ****” mod ** *********** ******* it’s *** ***********.

*** ***** ** * agree **** *** ***** half ** **** **** about **** ******** *** tamper. *** * ***** that** **** ******** **** with * ***** ***** illuminator**** ******** *** ***** comparison ***** ****, *** that **** *** **** because **** ****** *** after ****** ***** ** close ******. ** ********* is ***** *** *** rest ** *** ******* out *****. ** **** an ******* ******* ***’* use * *** ****** from **** ***** ****, let’s **** ******* **** the ********** *** ***** ***** ***** ***********.

** *** ****** ******* would **:

IPVM Image*** *** ***** ***** be

IPVM Image

*** **** *** ****** know ******* *** ****** of *** ***** *** been ***** ******* ** the “********* ********” ** is **** **** ******* there ** ** *****?

*'* **** *** ********* AcuSense *** * ******* have ******** ** **** regard *** *****'* *** a ****** ** *** some. ********* ***** **** saved *** ****** * whole *** ** *** false ***** ***** ***** from *** ********** *******.

* ******** ****** **** also ** ** ******** G2 ****** **** ** make **** ***** ****'* a *********** ********** *** it ***** **** * tamper ***** **** *** lights **** ****** ***.

@#$%!!!!

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

** ** *** ** this ***/***** ******** ****** alert ******* ****, ***’* it * ******* ********* with ***, ** ** the **** ************* *** don’t ******* ** ***/***** motion ***** ******* ** day/night ******?

**** ***** ** ** the **** **** *********'* G2 ******** ** *****. As *** ***'* **** above, ****** *** ******** tamper ********* ****** ******. ** ******.

****'* *** ***** ***** for ******* ****?

**** *** *** ** the **** ***'* ******* defeated **** ******** ***** laser ********(*******/****** ***) ** customer ***** **** ** tamper ******* *********. *** cameras ****'* **** **** to **. ****** **** of *** ***** **** another ******, *** *** close ****** ** ******** anything ******. *-****** ***. One *** ** *** laser ******* ** * tripod ** **** ** perfectly *****, *** ****** person ****** ******** ** to **** ***** *** camera *** *** ** it's ***. **** ******* back, ******* ******* *** camera ***** *******, ** video ** ********** ******** the **** ** ****** features...

****'* *** **** ******* impossible *** ****? *** i ****?

** **** ** ******* for *** ******. **** to *****?

* ***** ********* *** that *** ** ** was ** ******.

***, * ***** ***...

*** ******** *******?

** **** **** *** anyway

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