WDR Tutorial 2017

Author: IPVM Team, Published on Dec 20, 2016

Understanding wide dynamic range (WDR) is critical to capturing high quality images in demanding conditions. However, with no real standards, any manufacturer can claim WDR, and many do even if actual performance is weak, causing confusion for even experienced users.

In this tutorial, we break down these issues, explaining:

  • State of WDR 2017
  • What is WDR?
  • Interpreting WDR Specifications
  • How Do You Measure WDR?
  • Camera WDR Challenges
  • WDR vs Resolution
  • True WDR Implementations
  • Fake WDR Concerns
  • Manufacturer Terminology Confusion

************* **** ******* ***** (***) ** ******** ** ********* **** quality ****** ** ********* **********. *******, **** ** **** *********, any ************ *** ***** ***, *** **** ** **** ** actual *********** ** ****, ******* ********* *** **** *********** *****.

** **** ********, ** ***** **** ***** ******, **********:

  • ***** ** *** ****
  • **** ** ***?
  • ************ *** **************
  • *** ** *** ******* ***?
  • ****** *** **********
  • *** ** **********
  • **** *** ***************
  • **** *** ********
  • ************ *********** *********

[***************]

2017 ***** ** ***

***** *** *** *** ******* ** *** ****** **** ****:

  • **** *** **** *** ****:**** *** *** **** * ******* *******, *** *********** ********** to "**** ***" ****** *** *** ** ***** **** ** low **** *******, **** ***********'*/*****'* *** ************' *** *** ****(*** **** ***-$*** ******). ******** ** *** $***+ *** ****** typical ** *** ****, **** ******* ** ************* ***** (*** **** *** **** *** ****** ***** $*** ** *** ****** Finder).
  • ** ****** ***:*******, *** *** *** ** ***** ** ** ****** ******, where ***** ******* *** ****** *** *********** ********** ****** ** use ** *******. **** ******* ******* ***'* **** *******, ** some ** ***** ****** *** ** ***** ******** $***.

***** *** ** ****** * "*********" ******* *** *********** ***** varies ******, ** ****** ** *** **** ***** ** ***** cost *** ******** ************ **** ******** ** *******.

Our *****

**** ******** ********** *** ******** *** ****** ** ***. *** those **** **** ** *** *** ******* *** ******** ** depth, ******* *** ****** ******** ******** *** *** ******* **** ** *************. **** *** *** recent ***** *** *** **** *** ******** ** *** ** ****** *** ****** *** *** *** ******** - ***** ** ********* *** *** **** *** **** *** ****** *** ****** ** the ********.

What ** ***?

*** ****** ******* ******* *****, *** ** *********** *** ******* ** ******* **** ******* image ****** * ***** ** ***** ******. *** *******, ** the ***** *****, *** ****** ** *** ***** ** **** bright *** ** *** ******** ****** *** ****** ********, ***** the ***** ** *** ******* *** **** ******, *** *** back **** (****** *** ******) ****** ***** ** ** **** not ******* *** ****** ********. ** **** ****** ******* *** to ******* ***** ***** ****** *****.

*** *** **** * *** ********** ** ****** **** ****** different ***** ******. ****'* *********** * ****** ******* ** * *******. *** ***-*** ****** shows **** ***** *******, *** *** ****** ***********, ***** *** true *** ****** ******* ***** *** *******'* ****, *********, *** more.

Camera *** **********

****** ******* ********* ******** **** **** ****** ** ******** ******* of ***** ********** ** * ****** ********. ******* **** ***** to ******** ** *****. *******, *** **** ***** *** *** image ** ****** *** *** *** ****** ***** *** *** image ** *** ****.

** *** **** * ***** **** **** ********, ** ** no *******. *** ****** **** ****** ****** *** **** ******* size ** *** ******* ***** ** *** *** ***** ****** of *****. **** ** *** ************* ********* **** ***** ******* in **** ******** ******.

*******, ** *** ***** *** * **** ***** ** ********, the ****** *** * ***** *********. ** ** ********* *** amount ** ***** ** ***** ** ** ******** *** *** bright *****, *** ***** ***** ***** **** ** *** ****. However, ** ** ******* *** ******** ********, ********** *** *** light *****, *** ****** **** **** ** ****** ***. *** image ***** ***** **** ***** ********:

 

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

Measuring ***

** ** ******** ** **** *** **** *** ***** ** light ****** * ***** ***. *** ********* ******** **** ** measure **** ** ************ ** *** ******* (*.*., ****, *****, etc.) **** ****** ****** ********** ******** *** ***********.

*************, ***** ************ *** *** ************ *** *** ** *** discretion ** **** ************, ** ****** *** ** *******. *****, manufacturers *** ***** ********* "******" ** ***, ****** ****** **** more ********* (*** ******* *****).

******************* ***** *** ****** ******* (*.*., **** **** ** **** physically?), **** *** ******** ** * ******** **** ********. * grayscale ***** ** **** **** ******** ****** **** ***** ** black. *** **** ****** * ****** *** *******/*******, *** ****** its******** *** *** ****** *** *** *********** ****** **. ***** is ** ******* ***** *********'* *** *********** **********:

greyscale wdr

*************, **** **** *** ********* **** ** **** ***** ****** (i.e., **** *** * ****** *** ** ***** **** ******?) nor ** **** ******** ********** ** ** **** ** ******** fairly ** *** *************.

Interpreting *** **************

*** ****** ***** ***** ************ ** ************** ** **** *** self-assigned *** *** ********* *************. *******, ***** *** **** ******** to ********:

  • * *** ** ****** ** **** ** **** ****** ****** means **** *** ****** **** *** ******* **** *** ** manufacturers **** **** ****** ***** ******* **** *** **** ****** that *** ****** ** *** ** *** *** '*****'. '*******', *** WDR ******* ********** *** ********* ** *** ***** ** ** - ****.
  • * *** ** ****** ** ***+ *******, *** *** ******, means **** *** ****** ******** **** *****-******** ***. *****, ******, since ************* *** **** ** ****** *** ***** **** ****, it ** *** **********. **** **** ** ****** *** **** *** ***** ** *** *** **** *******.
  • *******, **** ************* *** ********** ************ ** ***** *** ** ratings. *** *******, **** ***** **** ** ***** **** *** cameras ** '****' ****. **** **** *** **** **** *** worse **** * **** ******* ************ ****-********* ***** ** *****. Actual ******* ** ******** ** ******.
  • ** *** **** *** *****, ** **** **** ************* ********** the ** **** **** ************** ** ***** ** **** *****. However, ** *** *******, ******* **** ***** ** ************** (**** 90dB) *** *** ******* **** ** ****-***** *******.

An *********** ********

** *** *******, ** **** ********* ** *********** **** ***** approach ** ********* *** ***** * *** ***** **. ***** a *** *****, ** ****** *** ********* *** *** ******* spots ** **** *****. *** ***** ** *** *** ******** a ****** ********* ** *** *********** *** ***** **.

** * ******* ******* ********, **** * ***** ******* ** an ******** *****, *** ***** ** ********* ***** ****, ** shown *****:

wdr measured lux

*** *** ***** ** ~*.**, **** *** **** ******* ** 1300 *** *** *** ******** ****** ***** ** ~*** ***.

*** ****** *** **** ** * *** ***** ** *, the **** ****** **** *** ********** ** ******. ********, *** lower ***** *** **** ******** *** ************* *** *****.

**** **** *** ******** *** **** **** ** ******* *** this *** ** **** ** * ***** **** **** * $100-$150 *** *****. *******, ** **** **** ** ** **** when *** *** ** ********* ** *** *** ***** **** vary ********** *** *** ** *** *** *****. 

 

Resolution **. ***

** *******, ****** ********** ******** ***, *** ***** ******* ***** equal. **** ** *** *** **** *** *** **** ************* approach (*** **** *****). *******, ********** *** ****** ** ****** helps ******* ***** ******* **** ** *** ****** / ******** areas. *** ** ******* **** *** *****:

5mp vs SD vs HD

*** ***** ********* ** *** ** ******, **** ****** ** use true ***. *** *** *** *** ****** ***** ** ****** because ** ******** **** *******. *******, *** ** ****** **** true *** ******** *** ****.

**** **** *****-******** *** ** ********* ****** ********* *** ******* wide ******* ******, ** ****** ********** ********* ** *** ******* to *****'* ***. *******, *** ****** *****, * ****** ********** non-WDR ****** *** ****** ********** * ***** ********** *****.

WDR *************** - **** ** ****

***** *** **** ********* *** *** ****** ** ******* *** exposure ************* ** ******* **** **** *** ****** *****, *** most ****** ****** ******** ** ** *** ******** ********* *** then ******* **** ** ******* * ****** ******* *****. *** short ******** ******** *** ****** *****, ***** *** **** ******** captures *** **** *****. *** ************** *****:

combine xposure wdr

** *** *******, **** ** *** **** ******** ** *** top ********** *** *******.

***** ** ********* ******* *** *** ******* ***** ******** *********, this ** *** **********. *** ****** ** ********* **** *** the ***** ***** ********** ********** *********** *** **** **** * difference. *******, **** ** ***** *** ********* ********.

Multiple ********* **** *** *****

* ****** ******** ** *****-******** *** *************** ** ***** *********** in *** *****. ***** ******** ********* ********* ********* *** **** a ******* *** ** ***. *******, **** ** ** ****,****** ************* ** **** *****, ********* * ******** ***** (****** ** too *** *** *** ******* ****** ****).

**** ***** *** *******, **** **** **** *** ** ******** at ***** *** ******* *** ***** ***********. **** ******* ** this *************, ****** ***** *** ****** ************* *** * *** have ** ******. **** ** ** ********* ******* ** ***** if *** ***** ** * ******** *** *** ******** ********. 

Fake *** **********

*** ***** ******-*** ********** **** ***** **** ******* ** ************* ** being ************ ** *****-******** ***. *******, *** ***** **** ***** **** these ********** ****** ** *** ******* ** **** * *** performance **** *** ******:

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

***, ** ********* ************, ****** ******* *** (******) ******** ** a ******. **** ** ****** **** **** *** **** ** capture **** *** ****** ** **** ***** ** *** ***** but *** ****. ** ***** ***, *** **** **** *** portion ** *** ***** ****** ** *** ******* ** *** other ***** *****.

"*******" ***

******* ***, **** ***** ** ****, ****, ** ********** *** ** *********** * ******** ********** ** multiple ******* ** *** *****, ******* ** *** ******* *****. DWDR *** ** ****** ** **** ****** **** ***** *******, but ***** ********** ***** ** *** ******* ** **** ***.

**** **** **** ************* ***** **** ******* *** ** ******** to **** ***, *** ***** *** ****** ******* *** ***, such ******' "******* *******" **. "******* ********". ****** ** ***** ***** *** ***** ** *** *** ***** ***** (**** *****).

Same ************ - *** ** *** ***

**** * ************* ****** '****' ***, **** ******* ********* ****** substantially ****** *********** ** ***** ******** ********** **** *** *** WDR *******. ** *** ***** ****, ** ** ***** ***** a *** ******* ******* **** **** *** *** *** *******.

**** ** * ********** ** **** *** ** *** ***:

axis wdr vs non

*** **** ** * ********** *** ****:

sony wdr vs non

****: ** *** ******* *** **** *** **** ** ***** shots *** **** ********* *****/***** *** **** **** ******** **** up ** **** ******. ***** ****** *** ******** **** ** examples ** ***** *********** ****.

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

******* ************* *** ** ******* ***** *** *******, ** **** put ******** * **** ** ************* ********* ******* **** ******* ‘true’ (*****-********) ***, ‘****’ (*******/********** ***), ** ****.  ** **** provide ***** ** ********* *********, ****** ***********, ***.

*** ** ************* **** ******* **** ******* ‘****’ ***, ***** about **** ** **** **** **** ******* **** ******* ******* WDR.

*** ******* ******* ********* **** **** *** ********** ************ *********, please **** ****** ************ ***** ***** *** ****** ******** ******. 

Camera ****** ********

** **** **** ******** *** ******** ***** ******* *** **** WDR *** **** ***** **** ** *** ****** ****** (***** *******, ****** *** = ***).

**** *** ***** **** *** ****** ******:

Test **** *********

**** **** * ******** **** ***

[****: **** ******** *** ********** ********* ** **** *** *** revised ** ******** **** ** ****** ******** ** *** ************.]

Comments (3)

*********** ******* *** ***'* ***** **** ** **** ***** ***** standard ******* ******* *** ********** ********* **************. ******* **** * manufacturer's ***********, ***** ****** ** ********* *** *********** *** ********* to ***** *** ******* ***** *** ****** ********* ********** *** bench *********** ** *** ******(*) **** *** **********. ***** ** an ******** ******** *** **** ****** ***** **** *********, ********* mine **** *******.

****-********** ********** ******** (****) ******** ********* ** *** ***** **** 5.

*** ********** **** ** **** **** * ****** *** ********* participate *** *** *** ******* ********* ** ****** *** "****" benchmark *****, ********* *** ***** ****** ****** *********** ***** ** the ********** ***** ** ****** ************* *** *** "***********" ***** for ***** ********. ** * ******** *** ***** ** ** truthful *** ** *** **** **** ***********, ******* * ******* can ** ******. ** **** ***** **** ********* **** ***** get ** ** **** **********.

**** ******* *****
(***) **** - *** ** ***
******** ***** *** ***** **** * - *** ** ***

**** * **** ********** ******* *** * ************ *** **** difference ***** ***** ******** **** ************* ** ***** ******* ****. Providing ** ****** ****** ***** ** *** ******** ***** ** be *** ****** ********* **** **** *** *** *** ** include **** ***** ** **** ** *** **** ** *** industry ** ***** *** ********.

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

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

********.

*** *** ******* **** *** ** ******* **** *** **** "W" ** *** ***** **** **** *** *** *** *** newer ****** ** ****** *** ** **** **** *** (***,***,***). They *** ****** **** * *(******* ***** *** **** *** and ***** *********). *** *** ******** ***** ********* *** ** only ****** **** ** *.

******, **'** ******* **** ***** **** *** "*" ***** ****.

Login to read this IPVM report.
Why do I need to log in?
IPVM conducts unique testing and research funded by member's payments enabling us to offer the most independent, accurate and in-depth information.

Related Reports

Axis Lowest Cost Outdoor IR Camera M2025-LE Tested on Apr 24, 2017
Axis has lagged offering low cost IR cameras while their Asian competitors have made IR standard even in their most entry level cameras. Recently,...
Ring Floodlight Cam Tested on Apr 20, 2017
Ring has released their latest entry, the Floodlight Cam, calling it the "Evolution of Outdoor Security", touting motion activated floodlights,...
Hanwha Lowest Cost WiseNet X Camera (XND-6010) Tested on Apr 13, 2017
IPVM bought and tested the lowest-cost WiseNet X model, the indoor 2MP fixed focal XND-6010 dome, continuing our testing of Hanwha's new WiseNet X...
Pelco Surevision 3 Tested on Apr 12, 2017
Pelco has released generation 3 of its Surevision cameras, claiming improved performance in both super low light and WDR performance. We bought...
Hanwha Wisenet X Tested on Mar 27, 2017
Hanwha has released their latest generation, the Wisenet X series, powered by their new Wisenet 5 processor. This new series claims improvements...
SimpliSafe Camera Tested on Mar 07, 2017
SimpliSafe is one of the most controversial companies in the industry, as they have become the symbol of the DIY threat to traditional alarm...
TVI 4.0 Doubles HD Analog Bandwidth on Mar 05, 2017
HD analog's move up market continues. Starting a few years ago at just 720p, HD analog is now poised for 4K and beyond. Techpoint, the company...
Uniview NVR Tested on Mar 02, 2017
Uniview, China's self proclaimed #3 video surveillance manufacturer behind Hikvision and Dahua, is ramping up its international sales efforts. In...
Avigilon Shifts Strategy To Maximizing Profitability (Q4 2016 Results) on Mar 01, 2017
Avigilon had previously been known for big spending, hiring a large sales force and throwing lavish partner parties at tradeshows like ISC West....
Vivotek 3MP 180 Wall Mount Camera Tested on Feb 28, 2017
Purpose-built wall mount panoramics have become an attractive niche to cover entranceways. In 2013, we bought and tested Vivotek's 1MP...

Most Recent Industry Reports

IP Networking Course May 2017 on Apr 26, 2017
NOTE: Registration ends tomorrow, Thursday the 27th. This is the only networking course designed specifically for video surveillance professionals...
Tri-Ed Favorability Results on Apr 25, 2017
Tri-Ed, owned by Anixter, far outranked Anixter, the lowest ranked company in our distributor favorability series. Still, Anixter's ownership did...
Chinese 'Attacking Us From Every Direction', Says US FBI on Apr 25, 2017
"Chinese eating our lunch. Attacking us from every direction" said the US FBI's Deputy Director Andrew McCabe at the ASIS 2017 CSO Summit. .@FBI...
Eagle Eye Exec On Mountain Of Servers - VSaaS Growth Analysis on Apr 25, 2017
Eagle Eye VP of Operations, Hans Kahler, posted a picture of himself sitting on top of a shipment of new servers, as a testament to the companies...
Axis Posts Strong Q1 2017 Financial Results on Apr 24, 2017
Axis posted strong numbers for Q1 2017, after having some challenges in 2016 (Q1 2016, Q3 2016). Inventory levels and overall spending show...
Axis Lowest Cost Outdoor IR Camera M2025-LE Tested on Apr 24, 2017
Axis has lagged offering low cost IR cameras while their Asian competitors have made IR standard even in their most entry level cameras. Recently,...
IPVM First Dean's List W2017 - Thomas Atkinson, Matt Hurly and Fredrik Lundqvist on Apr 24, 2017
IPVM is happy to congratulate and celebrate our first "Dean's List", the top students in our courses. For the Winter 2017 IP Networking course...
Splicing Alarm Circuits Guide on Apr 24, 2017
Alarm installers commonly connect multiple sensors to a single zone. They do this by splicing the wires together. In this report, we will explain...
PureTech Video Analytics Examined on Apr 21, 2017
PureTech's analytics were chosen for a US border protection system (see related post), which the company claims no other analytics vendor was able...
US Border RVSS / Video Analytics System Examined on Apr 21, 2017
US Customs and Border Protection has been rolling out a video analytics-based detection system along the US/Mexico border, with detection ranges...

The world's leading video surveillance information source, IPVM provides the best reporting, testing and training for 10,000+ members globally. Dedicated to independent and objective information, we uniquely refuse any and all advertisements, sponsorship and consulting from manufacturers.

About | FAQ | Contact