Surveillance Camera Imager Tutorial

By IPVM Team, Published Jan 06, 2022, 10:56am EST (Info+)

Imagers are fundamental to video surveillance quality, but can be daunting for those new to the industry.

IPVM Image

In this tutorial, we explain the fundamental issues and drivers in surveillance camera imagers, including:

  • Terminology: "Imager" Vs. "Sensor"
  • CCD vs CMOS
  • Imager Manufacturers
  • Camera Manufacturer Imager Disclosure
  • Imager vs Resolution
  • Imager Size
  • Pixel Size
  • Imager vs FoV Width
  • Imager vs Low Light Performance

Plus, we provide a 7 question quiz at the end to test your knowledge.

Terminology: "******" **. "******"

** *** ************ ********, *** ***** "imager" *** "******" ** "***** ******" are **** ***************. ***********, ** ****** refers ** * ******** ****** ** sensors, ** ** ********* ***** ** "imagers" **** ******* ***** ************ *******.

CCD **. ****

*** *** **** ********** ***** ** imagers **** ******* (******-******* ******)******* (************* *****-*****-*************).

*******, ** ****, ********* *** ************ cameras *** ****, **** *** **** "best" ** *** "*****." **** *** not *** **** * ****** ***, when *** ******* **** *********** *** offered ****** ***********, **** **** ****** down **** ** * ***** ****, lower ******* ***********.

******* *** **** *** "******", * prejudice ******* ******* ****, **** **** still ** *** ******* **** *** should *** **** *** **** ***********. However, **** ** *****, ***, ** a ********* ******, **********. ** *** only ****** *** *******, *** ***** eliminate ****** *** ****** ************ *******, including *** '***' ****** *** ******.

***** *** ***** **** *** ******* rarely **** ** **** ********** ************, such ** *** ** ******* ******, but **** ***** ************ **** **** increased *** ** ****.

Few ****** *************

***** *** **** * *** *********** manufacturers ** ************ *******, **** *** most ********** ***** *******************,****** (*** **** ** ** *************)*******. **** ****** *************, ****** ************* offer * ***** ** ****** **** varying ****, *** **********, ***** ****, and *** ************, ** **** * few.

Imager ************ ********* *** *********

****** ************* ****************** ****** ************/****** **** ***, ** it ** *** **** ** ******* two ******* ****** ***** ** ***** imagers. **** **** **** *** ****** manufacturer *** *** *** ******** *****. However, **** ** *** **** ** was ************, *** ******* ******** ****** ** imagers **** ******* *****/*********** *********, ** simply ******* *** ************ ***** ** of ****** ***. ********, **** ** you **** *** ******* **** ***** the ***** **** ******, *********** ** tuning, ******** ***, *********** ***** ***** result ** ******* ******* ***********.

Imager ********** *** ****** ********** *** ****

******* **** ** *** ******* ********** they *******, *.*, *****, ***, **, etc. ******* ****** ****** ** *********** higher **** **** *** ****** ********. However, * ******'* *** ****** ********** may *** ** *** **** ** the ******'* **********.

*** *******, * ****** **** * 6MP ****** *** **** * ******* stream ********** ** ***, ** * 12MP ****** ****** *** ****** ** 4K. **** ** ***** *** ** limitations ** *** ******-**-**** (***), ***** may *** ** **** ** ****** at ******* ********** ***** ******** ******* features.

Typical ****** *****

******* *** ***** **** ********* ***** (e.g.,**** *******), ***** ******** ** ** '**** frame', ** ********* ***** (*.*., **** phones). ************ ****** ******* **** ** fall ** *** ******, ****** **, but ********* ****** ****, **** ***** imagers.

*** ***** ***** ***** *** **** range ** '*******' ************ *******, ***** are ******* */*" ('*******') *** */*" (considered '*****').

IPVM Image

** ************, **% ** ******* **** imagers **** *** ******* */*" *** 1/3". *** **** ****** ****** ***** of *** ****** ** ************ */*.*", 1/2.7", *** */*". **********, *****-********** ****** (720p/1.3MP *** *****) ***** **** ******* 1/4" *******, *** **** ***** ****** predominantly *** ******* ****** ** */*" today, *** **** ************* ** ****** offer *********** ***** *****.

1/2"+ ******* **** ******

**********, ******* ***** */*" ** ****** imagers **** **** **** *** *********. However, ** *** **** *** *****, these ****** **** ****** ******, **** most ************* *** ******** *** "**** end" ***** ***** ***** * ~*/*" (or */*.*", */*.*", ***.) ******, ******** for***** *** *****.

************, ****** ********** *-*** ****** ***** 1/2" ** ******** ****** ******* *** now ********** ******, ********* ** *************' higher *********** ******, **** ******' ** ***** *** *** *****, **** */*.*" ********'* *** ***-*****(*/*.*"). *** ****** ****** ******* **** low ***** *********** ** ***** ****** resolution ****** ***** ********** ****** *** larger.

Larger *********** ******* ****** **** ** ************

************, **** ****** ************* **** ***** using **** ****** ******* ********* **** in ***********, ****** ***** ****** *** still ****. *** *******, *** ***** below ***** *** ** ***** ****** (center **** *** ***-*/**.*** *****), ******** to * ****** "*****", *** ****** to ******* */*.*" ******.

IPVM Image

******* **** ****** **** */*" *** still **** **** ** ************, **** only * ******* ** *******.********'* ********* ** **** ***** *** ***** use ** ***** ******* (**.***/~*.**"), *** others **** **** ******** ** ****, such ****** *****(***-*, ~*"),************'* ***** */* ******, ********'* ** / **** *****.

Imager **** **********

****** ****** ************, ****** **** ** almost ****** ********* ** ****** ************* on ************* ******. **** ** ** example ** *** ***** ** ****** typically ********:

IPVM Image

*******, **** ***** ******** *****, ** do *** ********* ****** ******** ****** is ******, ***** ** **** ***** factors ****** ******* ***********.

Pixel ****

******* **** ** *** **** ** their ******, ******** ** *******. ***** size ** **** ******** ********** ** imager **** *** *** ****** ** pixels (*.*., **********). *** ****** *** imager, ********** **** *****, *** ****** the ***** ****. *******, ** *** add **** ****** (*.*., ***** **** SD ** **) *** *** ****** size ***** *** ****, *** ***** size *********.

****'* ** ******* **** ** ****** manufacturer ******* ****** ****, ********** *** pixel **** **** ** ****:

IPVM Image

**** ****** ****** ***** ***** *******, everything **** *****, * ****** ***** can ******* **** *****, *** ********* deliver ********/****** *** ***** ******. *******, many ***** ******* ****** *** ***** performance ** ** ** *** ******/**** to ******** *** ****** ** ****** than ******* ***** ** ***** ****.

****, ***** **** ** ****** ***** disclosed ** ****** *************, ** *** best *** *** ** ** ******** by ******* ** *** ********** *** imager **** ** **** *****.

4K ******* ********* ******* ***** ****

** ******* *** ************ ******. ******** they **** ~** *** ****** ** 1080p ******* *** ** ****** ******* are ********* ****** **** *****, ********* the ***** **** *** ** ******* is *******. **** *** **** *** light ***********.

**** **** **** ** *** ****** the ****, **** ** *****-***** ****** models ************'* ***-*,****'* **** ******,****' */*" *****, ***., ***** *** ****** ****** size ********* ***** **** ***************.

Imager **** ** *** *****

****** **** *** * ****** ****** on ***** ** **** ****** *****. *** ******* *********** ** *** is **** ****** (*.*., ***, ****, 30mm, ***.).

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

** *** ***** ****, ****** ***** in ************ ** *** **** **** much, ** **** **** ******* ********* imager *****, *** *** **** ******* moderately. *** *******:

IPVM Image

** ****, ** ********* ** *** a ***** ******* *** ** ***** being ***** **.

Imager ** ******

******* **** ******* ** ** **** compressing ***** (*.*., *.***,*****, ***.). ******* *** ********* ****** image ******* ** **** **** ******* but *** ****** ***** *** ***** uncompressed ** *** ** ******* / System ** **** (***) ** ******* this.

Imager ** *** ***** ***********

******* *** ** ****, *** *********, and **** ******, ****** ** ******* is **** ****** ******* ****** ******* better *** ***** ***********. ****** ****** imagers ****, ***** *** ***** *** drivers **** ********* *** **** *********, namely *** ***** ***** ********** **** is **** ** *** ******* / CPU ** *** ******.

*******, *** ***** */*"+ ****************** *** *** ******** ********* ****** **** *** *** 1/3" ***** *******, ** ***** ****** typically ***** *** **** (** ******) processing **** ** */*" ****** ** larger */*" ******* **** ****** ***********, resulting ** ******* ****** ***********. ***** models *** ************ ********** ** *** *********.

************, ***** *** * ****** ** 1/2" ****** ******* ********* ******* ***** processing **** *** ***** **** ** low *****. **** ** ******* **** 1/2" ******* ** ******, *** *** still *** ** *** ***** ******* the ***** **** ** ****** ***** and *** ******* **** ** **** the ********** ***** ** ******* **** large ***********, ****** **** ********** ** **** ******** ********* ** *******.

Quiz ********

**** *** * ******** **** *** see *** **** *** **** *******.

[[**** **** *** ********** ******** ** 2014 *** *** ******* ** ****-**** to ******* ************ ** */*" *** larger ******* ** **** ** *********** in ** *******.]]

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