Testing Day vs Night With IR

Author: Ethan Ace, Published on Dec 09, 2014

IR illumination helps.

When it gets dark, especially real dark, with no nearby artifical lighting, pretty much every surveillance camera (even 'super' ones) are going to deliver significantly degraded images (see: Super Low Light vs Integrated IR Shootout).

Because of that, IR use in surveillance is growing robustly and for good reason.

However, how good is IR?

Specifically, we wanted to know:

  • How does a scene with IR illumination at night compare to the same scene during the day? Would IR illumination deliver the exact same details (save color) as the camera during the day? Or would it be degraded and, if so, by how much?
  • What benefit does increased resolution have using IR? How much better (or not) is 5MP vs 3MP vs 1MP vs VGA etc, when using IR?

We tested this with a variety of cameras to answer these questions.

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

**** ** **** ****, ********** **** ****, **** ** ****** ********* lighting, ****** **** ***** ************ ****** (**** '*****' ****) *** ***** to ******* ************* ******** ****** (***: ***** *** ***** ** ********** ** ********).

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

*******, *** **** ** **?

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

  • *** **** * ***** **** ** ************ ** ***** ******* to *** **** ***** ****** *** ***? ***** ** ************ deliver *** ***** **** ******* (**** *****) ** *** ****** during *** ***? ** ***** ** ** ******** ***, ** so, ** *** ****?
  • **** ******* **** ********* ********** **** ***** **? *** **** better (** ***) ** *** ** *** ** *** ** VGA ***, **** ***** **?

** ****** **** **** * ******* ** ******* ** ****** these *********.

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

Key *******

******* **** ** ** ***** ***** ** ******* *** **** and *** ** ***** *****. ** ** ***** ***** ******* *** consistently ***** **** *** **** *****, **** **** ***** ** illumination **********. *******, ** *** ***** ************* ****** **** ***-** dark ******.

**** ********** **** *** ********* ******* ** **** ******** **** IR ** ** ** **** ****** *** ***.

*********** ********** ** ***: **** **** **, ** *** ****** to *** *** **** ******* ** ***** **** *** ** during *** ***. ** **********, ** *** ************** *** / ***** *******, ****** **** **.

********, ** ***** / **** ****** *** *********, **** *** be * ****** ** ** *** ***** ********** ******* (*** to ***** ** *****) ** ** *** ** *** *** use * ***** ********** ** ***** (****** ******* ********** ********** ** * ********).

Image ********

**** ** *** ******* ** * *** ******, ***** ** tested ****** ** / ****** *** **** *** **** *** max **** ** ***.

*** ***** ******* ** **** *** *** ***** ** ****** notably ****** **** *** ***** *****, ******* ** ***** **.

**** ** * *** ****** **** *** **** **** ******* applied:

**** *** *****, * ******* ******* ******* ******* *** *** night.

***, **** ** * ******* ******** ******* ***, ***** **** IR ** *** ***** **** ** ***:

** **** ********** *****, ** **** * '*****' *** ***** camera ** *.* *** ('****** ***' ********). *********, *** **** a *** ** ****** **** ** ******* **** ** *** specific ***** ***** (***** ***** ** * *** ** **** scene ******* ** *.* ***) *** *** *********** ** **** camera (***** *** **** * **** *** ***** ****** ** a **** * ****** ****). *******, **** **** ******** * common ******* ** ** ** ***** ***** ****** **** ***** without **, *** ***** ***** **** *** **** *****.

Other ** *******

***** ******** **** ** ** * '**** ****' / ******** used ********, ***** *** ** ** ****** ***** *** ** even.

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

  • ******* *** ****** *** ***** ** **** *** ** *********** can *****. ****** **** ************ ***** ***** *** **** (******* ****** ****), ** ** *** ****** ** ** ******** *** ****** drops, *** ***** **** ****** ****** ** **** ** * non ** ******.
  • ******* *** *** ***** ** *** ****** / ** ******. Some ********** ** ******* *** ****** **** ** ********* *** automatically ********** ***** *** *** *** (*** ** ******** ** illuminator) ** ***** ** * **** ** ************.
  • ** ******** ***** ** *** ******* ** **** ****** ***. If *** ** ********* ** ******** **** *** ***, ******* captured ** *** ****** *** ***** ** ****.

*** ** **** ****** ** ******** ** **** ***** ** or ********** ******* ** *** *********** ********.

Test *********

********** ****** ** **** ****** **** * ****** ****** ** a ****, ** ******* ***********, **** ***** ** **** *** other ******** ********* ****** ********** *** ****. **** ****** ********* ********* within **** ****** ****** ** ******** *** *** ***** ******. Additionally, *********** ********* ******* ********* *************' ******* *** ** ********** such ** ******, ***, ***. *** *******.

******* **** ****** ******* ** * ~**' ********** ***** ** view ** ***** ** **** *** ********** **** (~** ** 1080p/~50 ** ****) *** **** *********** **********. *** ******** ** this **** **** ***** **** ************ **** **** *****, *** comparisons ** *** ******** ** *****'* *** ***** ** ******.

*******, ******* **** ****** ***** ******* ********, **** ******** ************ to */*** *** ************ *** ** ~**. ***** ********* *************' cameras **** **** ** *******. ***** ****** **** ***** *** lux ** **** ***** *** ~*.** *** **** ****** *** and ** **.

Comments (3)

***** *** ****, ***** *** ** ******. ** *** ** of ******** **** *** ** *** ******** ***** ***** ********* from *** ** **** **, *** ******* ********** ** *** image ****** ******* ***************. ** ** *** **** ********** ** the *** ** ***** *** **, *** *** **** *** Near ** ** ***** **** **, **** *** **** ** image **** **** **** *** ******* ********** (***** *** ******** remains ********). *** **** **** *** ***** ** ***** ****** with *** ****** *********** ******* *** **** ** *** ****** further ****. ***** *** ******* ******** ** **** *** **** IR ****** **** ********** ******.

** ****, ********* ***** ***** *** ** ** *****: *** this **** ** ********* *** ******* (***** **** ***, ***** was ***** ***** ******) ***** ********* ** ***** **** ** on. * ******** ****** ******* ***** ** **** ***** ***** switching ********** **** ** **** **** ******* *** *******.

*** ********* **** ******* ** **** *** *** ****-***** *** could ** *** ** ******* **** ********* **** *** ** night, *** * ****** ***** ** ******** ****** *******. ********* the ******* *****'* ** ***** ***** *** * **** ** be **** ***** ***'* ** *****.

*** ***** **** * ***** *********** ***** ***** ***** **** IR ****** ******* ** **** ******* ** “******” **** ********* on *** *** *** **. ** *** ** *** **** boards ** **** * ************ **** ** ******* *** ** the ******, *** ** **** *********** **** *** **** * decent ** ******* ******* ***** ** *** **** ****** ** the **. **** ** *** “******” ********** ********* *** ** the **** **** *** ** ***** ** *** ********** *** colors **** *** ******* *** *** *** ***** ***** **** you ********** ** ***** *** ********* *******.

***** :-)

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