Surveillance Camera Imager Tutorial

Author: John Honovich, Published on Dec 23, 2016

Imagers - CCD, CMOS, 1/2", 1/4", big pixels, small pixels, etc.

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

  • Sensor vs Imager
  • 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.

******* - ***, ****, */*", */*", *** ******, ***** ******, etc.

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

  • ****** ** ******
  • *** ** ****
  • ****** *************
  • ****** ************ ****** **********
  • ****** ** **********
  • ****** ****
  • ***** ****
  • ****** ** *** *****
  • ****** ** *** ***** ***********

****, ** ******* * * ******** **** ** *** *** to **** **** *********.

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

Sensor ** ******

******** ****** ************* **** ***** ********** '******' ** '******'. **** ********* to ************ *******, **** **** *** **** *****, ******, ***********, an ****** ** * ******** **** ** ******. ******* ** this, ** **** ********* ***** ** '******' **** ******** ***** surveillance *******.

CCD ** ****

*** *** **** ********** ***** ** ******* **** **** *** and ****.

*****, ** ****, ********* *** ************ ******* *** ****, **** the **** '****' ** *** '*****'. **** ** *** ******** of * ****** ***, **** *** ******* **** *********** *** CMOS *** ****** **** **** ** * ***** ****, ***** quality ***********.

******* *** **** *** ******, * ********* ******* ******* ****. However, **** ** *****, ********** ***, ** * ********* ******, impossible. ** *** **** ****** *** *******, *** ***** ********* almost *** ****** ************ *******, ********* *** '***' ****** *** models.

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

***** *** **** * *** *********** ************* ** ************ *******, with *** **** ********** ***** *******************,********* ****. **** ****** *************, ****** ************* ***** * ***** ** models **** ******* ****, *** **********, ***** **** *** *** ************, to **** * ***.

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

****** ************* ********* ******** ****** ************ / ****** **** ***, ** ** ** not **** ** ******* *** ******* ***** ** ***** *******. **** will **** *** ****** ************ *** *** *** ******** *****. For *******, **** ** *** **** ** *** ** **********, Omnivision ***** ****** ** ******* **** ******* ***** / *********** tradeoffs. ********, **** ** *** **** * ******* **** ***** the ***** **** ****** (***** ** ****, ** ********), *********** in ******, ******** *** *********** ***** ***** ****** ** ********** quality ***********.

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

******* **** ** *** ******* ********** **** *******. **** ********** the ******'* ******* **********. **** ******* *** *** ** ***, 1.3MP, ***, ***, ***. ********, ** / **** ******* **** emerged ***** ** ******* ** ****** ** *******.

Imager ****

******* *** ***** **** ********* ***** (*.*., *****) ** ********* small (*.*., **** ******). ************ ****** ******* **** ** **** in *** ******, ******, *** ********* ******, **** **** ***** imagers.

*** ***** ***** ***** *********** ****** ****. *** *** ****** ones ** *** **** *** ****** *** ******** *** ************. The *** ** *** ***** (*/*.*") ** ******** ***** ****** large *** ******* ************ *******:

**************, **% ** ******* **** ******* **** *** ******* */*" and */*". *** **** ****** ****** **** ** ************ ** ~1/3", **** */*.*" *** */*.*" ******. **********, ***** ********** ****** (720p/1.3MP *** *****) ***** **** ******* */*" *******, *** **** these ****** ************* *** */*" ******* *****.

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

**** *** **** *** *****, *** ******* ****** **** *** increased **********. ** *********** ********, ***, ***, ***, **, ***., imager ***** ****** **** */*" *** ********** ******** **** ******.

**** ** */*" ***** *******

*** **** ********* ****** ***** ** ****** **** **** ** the **** ** */*" ***** *******. **** ************* *** **** at ***** *** "**** ***" ***** ***** * ~*/*" (** 1/1.8", */*.*", ***.) ******, ******** *** ***** *** *****. 

****** **** */*" ***** ****

******* ****** **** */*" *** ***** **** **** ** ************, with **** * ******* ** *******. ********'* *** ****** ** best ***** *** ***** *** ** ***** ******* (**.***/~*.**"), *** others **** ****** ********* ** **** *********, **** ******'* **** *****, *** *******/***** ***-* *********** *** ****.

Size **********

****** ****** ************, ****** **** ** ****** ****** ********* ** camera ************* ** ************* ******. **** ** ** ******* ** the ***** ** ****** ********* ********:

Pixel ****

******* **** ** *** **** ** ***** ******, ******** ** microns. 

***** **** ** **** ******** ********** ** ****** **** *** number ** ****** (*.*., **********). *** ****** *** ******, ********** else *****, *** ****** *** ***** ****. *******, ** *** add **** ****** (*.*., ***** **** ** ** **) *** the ****** **** ***** *** ****, *** ***** **** *********.

****'* ** ******* **** ** ****** ************* ******* ****** ****, resolution *** ***** **** **** ** ****:

**** ****** ****** ***** ***** *******, ********** **** *****, * larger ***** *** ******* **** *****, *** ********* ******* ******** / ****** *** ***** ******. *******, **** ***** ******* ****** low ***** *********** ** ** ** *** ****** / **** to ******** *** ****** ** ****** **** ******* ***** ** pixel ****.

****, ***** **** ** ****** ***** ********* ** ****** *************, so *** **** *** *** ** ** ******** ** ******* at *** ********** *** ****** **** ** **** *****.

** ***** ****

** ******* *** ************ ******. ******** **** **** ~** *** pixels ** ***** ******* *** ** ****** ******* *** ********* larger **** *****, ********* *** ***** **** *** ** ******* ** *******. This *** **** *** ***** ***********. ****, ** ** ******* further, ****** ** ***** ********** **** **** ** *******.

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

****** **** *** * ****** ****** ***** *****. *** ******* *********** ** *** ** **** ****** (*.*., 3mm, ****, ****, ***.).

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

** *** ***** ****, ****** ***** ** ************ ** *** vary **** ****, ** **** **** ******* ********* ****** *****, *** FoV **** ******* **********. *** *******:

** ****, ** ********* ** *** * ***** *******, *** is ***** ***** ***** **.

Imager ** ******

******* **** ******* ** ** **** *********** ***** (*.*., *.***,*****, ***.). ******* *** ********* ****** ***** ******* ** **** they ******* *** *** ****** ***** *** ***** ************ ** the ** ******* / ****** ** * **** (***) ** perform ****. 

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

******* *** ** ****, *** *********, *** **** ******, ****** in ******* ** **** ****** ******* ****** ******* ****** *** light ***********. ****** ****** ******* ****, ***** *** ***** *** drivers **** ********* *** **** *********, ****** *** ***** ***** processing **** ** **** ** *** ******* / *** ** the ******. **** *** ***** **** ** ********* **** ** *** ***** *********** *****.

*******, *** ***** */*" ***** ******* *********** *** *** ******** ********* ****** **** *** *** */*" ***** *******, ** these ****** ********* ***** *** **** (** ******) ********** **** in */*" ****** ** ****** */*" ******* **** ****** ***********, resulting ** ******* ****** ***********. *** *** ***** ** ****' */*" ***** *********** ********* */*" *************** ***********, *** ******* */*" ******* *** ****** *** ********.

************, ***** *** * ****** ** */*" ****** ******* ********* ******* image ********** **** *** ***** **** ** *** *****. ****, a ****** ** ** ******* **** */*" ******* ** ******, but *** ***** *** ** *** ***** ******* *** ***** size ** ****** ***** *** *** ******* **** ** **** the ********** ***** ** ******* **** ***** ***********.

Quiz ********

**** *** * ******** **** *** *** *** **** *** know *******

Updated ****

**** **** *** ********** ******** ** **** *** *** ******* in **** ** ******* ************ ** */*" ******* *** ** cameras.

Comments (9)

**, * **** ** ***** *** ********* ***********; ** *** as * ****, ********** *** ***** **** **** ******** *** spatial **********. *'* ******* **** *** ********* **** "****** ****** higher ******* ********** *** ******** **** * ******* ****** ** pixels **** ***** ** ***** ******* **********"

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

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

****'* ****, ******** *** ****** **** ***** *** ****, ****** because *** ***** **** ** *********** *** **** ** *** ********** (*.*., ******) **** ********. Bigger ****** ** *** **** *************** ***** ******, *.*., ******* **********.

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

"****** ****** ****** ******* ********** *** ******** **** * ******* number ** ****** **** ***** ** ***** ******* **********"

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

** ************, **% ** ******* **** ******* **** *** ******* 1/2" *** */*". *** **** ****** ****** **** ** ************ is */*".

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

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

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

"****** ******* ** ******* ******* *** ****** ********* ** *** non-standardized "****" ****** ** ************* *.* ***** *** ****** ** the ******** ** *** ******. "

*** *******, * */*" ****** *** * ******** ** *** (or .*** ******). ********** ** *.* ***** ****** */*".

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

** **'* ***** **** * ****** ***** **** **** *** the ************* **** ***** *** ********? *** **** ***** ******* the "***** ***" ** *** *****?

** *** **** ** ***** *****, ***** ** * ****** odd ***** ***** ** ***** ** **** **** *****, ***** whenever *** **** **** *********** ** ** *******, *** ******** measurement ** ** ******* ***, *** ** **. * ***'* think ** *** *** **** **** ***** ****** ****** ** chance?

*** **** *** *** ****, **** **** **** **** * 1/4" ****** ** **** ****** ** ****** *** **** ****** ratio, ** ** **** ***** **** * *** ******* ** what ** ***** **? ****** *** *** ******.

***, *'* * ****** ********* ** **** ********; ***** *** you **** *** ***** ****** ** ****** * ************************, (****** ******* ****, *** *** *** *** "*******" :)

* ***** ****** ***** * ************ ****** ** *** ** came ** **, *** * ***'* ***** **'* ** '********' anybody. **** * *** ***** *** **** '**** ** *** day' , *** ****** ** ****, *** *** ****** *** surrounded ** **** **** ** ****** **** (**** **** ******!) thingy **** **** *** ******** **** ** *** ***** ********* "1/4 ** ********. *** ** ****** *** ****** ****** **** was *******. **** **** ******* ***** *** *****, *** ******* making ******* ********, **** ******* **** *****.

** ***** ** **** **** *******, **** *** ** ***** on *** ****** ********** ** *** *** ********, *** *** some ****** (****, *** ******), *** **** ** **. *** that ******* *** **** ****** ** *** **** **. ***** John ** ******** ***** ****. *** *** **** ******* ****'* unimportant ***, *** **** ***** ********* **** *** **** ***** you **** ** **** ** *** ** **** *** ***'* know *** ***** **** ** *** ********** **** *****, *** just * **********.

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

***** **** ** *** **** ****** ** ***** *** ***** performance.

*********: *** *********** ** *** ****** **** *** **** ** any ****** ****** **** ***** ****, ******

***** **** ** ****** *********, ** ** ** **** ** use ** * ******. *** *** ******** ** ** *********** resolution *** ****** ****.

*** ***** ********** *** ****** **** *** ****** ****** *******, one *** ****** ****** ****** ** **** ****** ********. ** add *** *********** ** *** ****** **********, **'* ** **** as ***.

*******, **** **** ****, *** ***** ******* ****** ******* ********* on ***** **********

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

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

**** *******, ********* ** *** ******, ** *** **** **, and ********* **** ***** ** **** ** *** ** * metric.

****, ******** ******** ** ******* *** ***-***** ********* ** ****** (IR) *****. ** *** **** ** *** (***) ******* **** integrated ******* *****, ** ***** ******** *** *** ** *** 'good ***-***** ***********', ****** ** ***** *** ** *** * 'good *****'.

*** *** **** ******* ****** **** ** ****** **** ***** size?

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

**** ** ****, *** ****** ** *** ***** ** ******** proportional ** *** ****** ** ****** *****, *** ********* ** focal ******. ** *** *******, * */* ****** ****** *** 75% ** *** ***** ** * */* ****** ******.

**** ** ****** ***** ** **** *** ***** **** * FOV ***** ** **** ** ****.

**** * ***** ****** ***** ** **** *** ***** **** a *** **** ** ****.

** ****** ****** ***** ***'* **** *** ***** **** *** degree ***** ******* **, ***** ***** ***** ****** **** ** a ********* ***********.

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