4MP Low Light Weakness Tested

Author: Ethan Ace, Published on Jul 19, 2016

4MP cameras are an emerging force in video surveillance, with many manufacturers now focusing on 4MP as their new high end, surpassing 1080p.

However, IPVM has found a specific weakness in low light capabilities versus 1080p and not simply in ultra low-light (e.g., under 1 lux) but even with less than 200 lux, which is certainly not dark, but causes issues.

In this report, we share our findings, show image examples of what the problems are and what you should do.

*** ******* *** ** ******** ***** ** ***** ************, **** many ************* *** ******** ** *** ** ***** *** **** end, ********** *****.

*******, **** *** ***** * ******** ******** ** *** ***** capabilities ****** ***** *** *** ****** ** ***** ***-***** (*.*., under * ***) *** **** **** **** **** *** ***, which ** ********* *** ****, *** ****** ******.

** **** ******, ** ***** *** ********, **** ***** ******** of **** *** ******** *** *** **** *** ****** **.

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

OmniVision *** *******

****** ************* *** ********* ******* ***** ***** ******* ****, **** our *********** **** ******** *******, ** ******* *** **** ********, if *** ***, *** *** ****** ********* *** ************* *** *******.

Poor *********** ** ********** ****** ******

** *** *****, ******** *** ******* **** ********* ****** **** in ********** ****** ******. ******* *** ******* *****:

** ~*** *** (*****), *********** ******* *** **** ******** ** the ~*** *** ***** ** *** ****, ***** ******** *** ******* more ******* ***********, **** ********, ****** ****, *** ******* *******.

***** ******* **** **** ********** ** ********** ** *****/**** ** resolutions, **** *****. ******* ********* *** ******* ******* ** **** light ****** ****, **** ****** ***********.

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

** *** *****, *********** ** **** ******** ** *****/**** ******. For *******, *** ***** ***** ***** ***-** ******* **** *** same ************ ** ~* ***. *** *** ****** ** ****** totally ****, ***** *** ***** *** **** ****** ******* **** the ******* *** *****, **** *** **** ****** **** ********* the ***** *** ***** ** ****.

IR ***** **** ***********

**** **** *** ***** *********** ** *********** *** ** ********** IR ** *** **** ******** ** *** ******. *** *******, Dahua *** *********'* *** ****** (** ***** ***** ********* ** ***** America) *** ******* ********** **, **** ** ***-** *******, ****** Axis's *****-* *** ** *** **** ********* *** ****** ********* ******* **.

******* ** *** ** ***** ** * ******* ****** *****, we *** *** **** *********** ** ****, **** *** ***** almost ***** ******* ** *** ******* ***** *****:

Beware *** ******* ********* ***** *** *******

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

**** **** *********** ********** **** ******* ** *** ******* ************ / *** ******* ** *******. *** *******, *** **** *** camera (*****) ** ****** ** *.* *** '***** ***********' *** as *** ****** ***** **** **** ** *** ***** **** level (*.*., *** ***) ***** ******* ** ******* ******** ********. The **** ******* *** *** *** ***** ** ***** ******* that *** ********* ** * *** ******** ** ** ****** on.

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

***** ** ** **** ** ****** ******** ** *** * problem *** *** ******* **** **, *** ****, ***** *** Hikvision *** ******* *** ************ *********** ************ ** *********** ** under *** ***, ***** ** *** *** **** *** ****** IR *********** *** **** ***** ****** **** *** ********** ** found ****** *** *** ** ****** ***** ******* ****** ******** lighting.

** *** **** ***** **** *** *** *** ****** **, ** especially ******* ***** ***** ***** *** *******.

Comments (29)

**** ***** ** ****, **** * ********** *********** *** **** might ** * ******* ** *** ****** ** **** *** mostly ***** * ****** ******. **** ** *** ****** ******. Shoot, **** *** **** ****** ***** ***** ****** **** *** 1080P ****** ** *** * *** *****.

* ******** **** *** * ********* ********** **** ********** *** ******. * *** ******** ****** ****** ** *** **** ** performed ** * *** ***** ******* ********. ** *** **** to *** *** **** ******* **** ** ***** ***. *** scene *** **** **** ** ** ***** ***, *** *** camera *** **** ** *** ***** * *** ** ****** in ***** ****, ******* ****** ** ******** ** ***** ****. I *** ********* **** ** *** ***** ** **** *** switch ** ***** ****. ***, **** ****, * ****'* **** another ****** ** **** **** ***** ** ******* ** ******* 720p ** *****, *** ** ****'* * **** ********* *** sure. * ** ******* *** *** **** ********* ** ** a ******** ******* ** *******.

**** ***** **** ** ** ** ******* **** * *** years *** **** ***** **** *** * ********** ** *, 3 *** * **** *******, **** ******** *** *** *****. I ******** ****** *** ******* **** ***** ****** **** *** best **** *** *** **** ** ***** ** ******* ***** quality ** **** ************. * ***** ** ****** *** *** thread *** ******'* **** **.

* ************* *** **** *** *** ******** **. ** ** ********* to ******* ****** ****** ********* ******* **** ******* ***** **** lower ********* ***** ******. **** ***** ** *****, *** **** see ***** *********, ********** ** **********. **** ** ** **** be ******** ********** ** ****** ****. ****** **** ** ******** and ************* *****.

****'* ******* *** **** ** *** *** * *** ******* about.

*****://****.***/*******/**-******-****-*****-****

****'* ** *******:

***********, ** **** ** ***** ****** **** *** **** ******** 1080p ** *** ******* **** *** *** ****, *********** ****. Nearly ****** **** ** **** *** **** ******** **** **** 5mpxl. **** *** *** **** *** ***** ***********.

* ******** ******* *******'* ******* * ****** ***** *** *** thought **** *** * **** **** *** ** *** ***** performance, ****** ** ****** *****'* *********** ** ** *** *****.

** ******* *********** ** *******. ** ***, *** ***'* **** manufacturers ***** ** ** ** ****** ** ***** ****?

*, *** ******* ** **** ******* (****** *** *****) ** comparatively **** ** *** ***** (*** ******* ****** ******* *****). *******, ******* **** ****. *** **** *** ** ********** improve *** ***** (*** ************* ******** ** ****), ** ******* bandwidth ***** ** * *** ******* ** ***** *** **** cameras.

**** **** ****** **** *** *** **** ****** *** ******* manufacturer ** **** ***** ******* ** ** ******. *** **** Arecont *** *** ****** ** ** **** ******** ****** **** offering **? ** **** ****** **** *** ******* ** **** important ** ****** * *******?

******* **** *** ****** / ****** ******* ** *** ** camera. ************, * **** *** **** ******* **** ***** * patent ** * ******** ******* **************.

** *** ******, * ** *** ****. *** **** ********, from * ********* **********, ** **** *** *** ********* **** you ***'* *** **** ********** ******** ** ***** ******, ***** is ******* *********** **** *** *** ********* **** ******** **** to ***** **** * ******* ********* **********.

* *** **** *****, *** ** **** **** ** *** it **** ****, * ***'* *** *** ** ******'* ** an * ****** **** ****** ** *** ** *** ***. That *** ********* *** *** *** ********** ** ** ***** and *** ** ** ***** **********.

** *******, ***** *******, *** * ********** **** ** *** trying ** **** **** **** ***-*********** ***** ** ****** ******** images **** ********* ****** ** ******* **** * ****** ********. Then * ****** ***** ** ******* **** **** ******* ********** for *** ****** ***** ** *** ***** *** ***** ******* resolution (*** ****** ***********) *** *** ****** ***** ** *** scene. ** ** ***** ** **** ****** * ************ *** and **** ******* ** *** ***** *** ***** *** **** parts ** **** ******* ******** *** **** ** ** ** automatic *** *********-******** ***. **** *** *** ****** *** *** best *******. ** **** * ****** ** **** *** **'** looking *** ************* ********. ****** **********?

****, * ****** *** **** ******** ********** **** ** *** big ***** *******, *** ******* ****, *****, *********, ****, *********, Dahua, ***. ** **** ** *******, **** *** **** **** of *** ********** ******* ******** ** ***** *** *****?

** *** **** ******** * ******* ****** ** ****** (****, license, ***.) *** ********** (***** * ***-***** *** ******), *** we *** ******* ** *** ****-***** ****** ****** *****. ** have ********** **** ** *** *** ***** *****, *** ** haven't ********** **** ** *** ******** ****** *************. ** ****** there ** **** *******, *** ** *** *****, ** *****'* heard **** ***.

****, **** ** *** ***** **** ******* ** **** ****** vs ******* ******* **** ** ************ *******? *** **** ** a ******* ** **** ****** ** **?

****** **** ***-****** **********.

*** **** ** *********** *** ***-**** ****** ****. *** *** unit ****, **** ********, ** *********** ****.

*** ******** ******** **** ********* ******* ** **** ** ****. There ** **** ****** ***-**** ********** ********** ** **** ****** already ** **** ****** ***'*.

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

** **'* ** *** ****** **** *'* ******** ***'** ******* about ***'*?

******* *'** ***** **** ******* ** ****** **** ** ******* pitch ****** ** **** ******* ** *** *** ***** *********.

***** ** * ****'* **** ** ** **** *** **** asking.

***, **** ***** ** **** ** ****, *** ****'* *** we ***** ************ ***** ****. *** **** *** **** ** done ** **** *******, *** *'* ******* **** **** ** where ** **** ** **** *****. *** ***, *** *** correct, ******* ** **** ******* ** *** *******. ***********, ***** more *********, **** ******-****** ******* *** **** **** ***** *** early **'* ** ******** ****, *** ****** ******** ** **** front-ends ** ******* ****** ******** ********** ********* ** **** ** a ****** ** ****-****** **** *******. ** *** ********** ** do ** **** ** ****** *** *********.

**, *** ****** ** ****, ** ******* *** **** ****-***********.

** **** ** **** ****** ********* ********** ********* **** ****** shutter **** ***** **** *****, ** *** *** ****** **** that ** **** ***********?

********. ******!

**. ****** ******* **********, **** ** ** *** **** ******* sensors, **** ****** ******** ****** ********** *** ****** ****** ** an ****** *******. ** ** *** ****** ******** ********** **** allows ******* ** *******, *** ********** ** ******* **** ******** photo-collection *****, **** * ****** ******* **** **** ******** *** capability ****** *** ** **********. ** *** **** **** **** charge ******* *** **** **** ** ********** **** *** *******, and *** **** **** ******, ********** *************, *.*., ****, ** charge ******** ** **** ******* *****-****, **** ************ **** ** techniques *** * ****** ******** *** *** **** ***-***** *********** of ****-***** *******. ***********, *** ******** ********* *** *** ****-***** sensor ** ******** ** * **** ******* ********** ****** *** bright *******, ** **** ***** *** **** ******** **** *** sensor **** * *****-********** ****** **** ******, **** ********* ****** in * ****** ******* ** *** *****. *** *** (** more) ********* ******** ** *** **** ******** **** *** ** combined (*** * ******* *********) ** **** * ****** ***** with ******* ******** ***-***** ***********. *******, ****** ******** ********* **** different ******** *****, ***** ** *** **** *** ********, ***** are ** ****** ********* ******* *** ******.

****,

***** ****! * ** **** * ******** ******. **** ******* in *** ****** ***** ** *** ***** ** ******** ** pixel *******? **** ** * ****** ***** ** ******** * given ****** ** ** *****, *** ***** ****** **** ***** the ***** ***** ********* *** ***** ** ****** ******. ***** I **** ** *** ** **** ******** *** ********** ** identification? *** ***** ****** **** ****** **** ** *** ***** noise ******?

** ***,

**** ***** ******* **** ** ****, *** **** ****** ** that *** *** *** *********. *** ********** ** **** ** is ****** ** *** ********* ** *** ******* ********** **** nothing ** *** ** **** ******* **********.

***********, *** ******** ********* *** *** ****-***** ****** ** ******** as * **** ******* ********** ****** *** ****** *******, ** then ***** *** **** ******** **** *** ****** **** * lower-resolution ****** **** ******, **** ********* ****** ** * ****** readout ** *** *****. *** *** (** ****) ********* ******** of *** **** ******** **** *** ** ******** (*** * complex *********) ** **** * ****** ***** **** ******* ******** low-light ***********.

*'* ******** *** *** ****** **** *** *** ** *** not **** ** *** *******'* ******* ** ** ****** ***** to ********* **** **********?

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

** **** *** **** **** ** **** * ********* ********* CMOS *********. ** *************, **, ** *****'* **** **** ** test **** ******** ** * **** ******. ** ** **** to ****, *******, **** **** *** ******** *********, ***** ***** are **** ** **** **** ***** **** **** ******* **********. Not ************, *** *** ******* **** *** ****** *************. **** is *** ****** *******. (* ** * ****** *********, ***. Well, ** **************.) **** ** **** ****** *******.

** * *** ****** ** ****** **** ** *** **** you *** *** **** ***** ****** *********** ** * ******* 2mp ****** ** ** *** **** ** ******** *** * 2mp ****** *******, *** **** ******* * ***** *** * am ***** ***

********* ********, ******** ********** ******** ** * ****** **** *** significantly ******* *** ***** ***********. ** ***** **** *** **** but *** **** ********* ***** ** ** ********* *** **** cameras ***** ******* ***** *** ** ********** ******.

*******, ** ** **** ** *** ****** *** *********** ** pixel *****. *** ********** *** ** * */*" ****** ** too *** **** *** ******* *****, ***** ***** *** ****** on *** ********** *** *** ***** ** ** * *** smaller ***** **** ** *** *** ***** *******.

** ****,

*** ***** *** **** ********* **************. ** *** ******* ** done **-**** *** ** *** ****** ******, **** **** ** exactly *** **** ** ****** ******, *** * ******* ****** of, ******. *** *** ********* ********* **** ** * ******** solution ** *** ***-***** *********** *******. ** ****, ** ******, reduces ****-***** ***** *** ****** ** *********** ****** *** *******. So ** *** ******-****** ******* ********, ** * * * = * ****** *** ******, *** *** *** ******* ** the ****-***** ********* ****** (******* *** ****), **** *** ****** goes ** ** * ******* *** ******** ** *** ***** (read-noise ** **** ****). ** ***** ******* ** **** ** the ******* ******, ** *** ******* **** ** **-**** ****** processor, **** *** ****** **** ** ** *, *** *** noise **** ** ** ****(*)=*, ** *** ******-**-***** ***** ******** by */****(*) = ****(*) = *. **** ** *** ** good ** ******* ** *** ****** ******, *** ** ***** a *********** ***********.

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

** ***** ** ********, ~**% ** ********** ******* ***'* ******* binning ** ***, *** *** *% **** ** (*.*., **** Arecont's), * ** ****** **** ** **** ** *** ******* domain.

** ***** *** ***** ********** ****** ****** ***** ******, ****** let ** ****. **'* ******** ** ********** ** *******.

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