Resolution Tutorial

Author: John Honovich, Published on Dec 16, 2016

Understanding video surveillance resolution can be surprisingly difficult and complex. While the word 'resolution' seems self-explanatory, its use in surveillance is far from it. In this tutorial, we will explain 5 critical elements:

Resolution – Seeing Details

  • **** ********** ************* ***** – ****** ******* - *** *** constraints ** **** ********
  • **** ********** ******* ***** ** ************ – ****** – *** the ****** ** ***** **** ******
  • *** ****** *** ****** *********** *** ****
  • *** *********** ******* ********** *******
  • **** ****** **********'* *****

** ****** ******* *** ******* *****, ********** ***** *** ******* to ******* ******* – ** *** ** **** **** ***. For *******, *** *** **** *** ****** **** ** ** eye *****? *** *** ****** ******* ******* ******** ***** **** by **** ** * *******? ***. ** ** * *********** metric ******** ** *******.

*** *******, ** **** *******,*** ***** *** ** ******* ***** ** * **** ********** camera

************, ***** ************ **** * ******* **** ***** ********. ****** camera ********** *** ******** **** **** ******, ********* *** ******'* ability ** ******* **** ***** **** ** **** ** * given **** ** * *******.

line chart

** *** ***** *** **** *****, ** ***** *** ***** see **** **** ***** ******* – ****** ********, **********, ******* plates, ***.

*** *** ** ****. *** *******, ***** **** **** * ***** ***** ****, *** ***** **** ******* ** ** ******* ***** ** 500 '*****', ***** ******* *** '*****', ***. ** ***** ** the ***** *****:

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

****** **** **** *** ***** ******* *** ****** **** ** ********* even ******** **********. *******, **** ****** ******** ** *** *****, the ********* ***** ***** ******, ****** ******* *************. **** **** challenging, **** ******* ***** *** ***** ** ***** *********** ******** conditions **** ******.

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

Resolution – ***** *****

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

pixels sensor

*** *******, * ***** ********** ****** ** ******** ********* ** having *** (******* *****) ********** ******* *** ****** **** *** ~2 ******* ****** ** ** (*********** ******* *,***,*** ****** ** that ** *** ******* ** **** ********** * **** ******** ******). The ***** ** ** ****** ***** ***** **** *******:

Pixels ********* *********, *** *******

****** *** * *********, *** *** **********, ****** *** ********* details. ******* * ******* ****** ** ****** *** * ***** area / ******, ** ** **********. *** *** ******** ** why****** ********* *********, *** *******.

***********

*** *********** ** **** **** ******, **** **** ****** **** counts, ******** ****** ‘*******’. *******, **** ** *** **** *******.

**** **** **** ******* ********** ************ **** **** **** ***** lighting **********, ********* ****** ***** ******* *** ****** ** ****** real ***** ************ ******** **********. *****, *** *** ******, ****** many **** ****** *** ****** ** ****** ********* ***** ** low ***** **********. ****, ******* **** ***** ***** ****** *** superior ***** ********** *** ******* ****** ******* ****** ** ****** sunlight / *** ******.

***********, ****** **** ****** * *********** ** ********** ** ***** surveillance. ******* *** ***********, *** ******:

  • ********* **** **** * ************ ************ ** ******* ***** **********, they *** ****** ********* ********* ** ***** *****, *** ********* power
  • ********** *** ********* ********** ******* *********

*** ***** ***** ********** *** **** ****** *********** **** ** production ***** ************ *********** *****:

********** **** *****, *** ****** ****** ** *** **** *** higher ********** (*.*. ***** *****) *******. ***** ***** ******* *** often ******* **** *******, **** ** **** *********** ********* (*** light, ***).

Resolution ****

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

** ** ****, **** / *** ** ** ** ***** decline **** **** ****** ***** ************. ** *** ******** ****, 4MP ** ** *** **** *** ** *** ******* ********** moving ** **** ***** ** *** *-*** *****.

Resolution – ****** **. ******

***** ************* ********* ******* ******* ***** ** *** ********** (*.*. pixel *****) ** *** ******, *********, *** ********** ** *** stream **** *** ** ****. **** ******* ** * *****:

  • *** ************ **** * ****** ********** ****** **** ******* ****** they *******. *** ****** ******* ** **** ** ********* ******* where * *** ****** *** ** ******* **** * *** *** ****** ****** ** *********.
  • *** ********** ********** ** ********** **** * ****** ** * lower **********.**** ********* ** **** ** **** ********* *** ***** ***** ** is ****** ** ***** ** ****** ** *** *** ******* resolution *************. ****** ***, **** ***** ** ** ********** *** look ‘********’ *** *** ***** ** ****** **** ** ** not *** ** *** *** ****** ********** (*.*., * *** camera *** ** *** * ***).

**** **** ** ***** *** **** *** ********** ** *** sensor *** *** ****** *********** ********* *** ****.

Do *** ****** ***********

*************** *** ******** ******** ******, ** **** *** ******** *** much *** ****** *** **********. **** ***** ** ******** * value ** ********* *** *****, ********* *** ** * ***** of ~** ******* (** ****), ******** * **** ****** ** data. *** ********, * *****/***** ************ ****** ** **** ***/*. However, **** ******* ***** *****, ************ ***** ** ****** ****** compressed. **** *****/***** ****** ***** **** ********* ** ******** ** 1Mb/s ** ***/* – */******* */********** **** *** ************ ******. *** **** ******** – *** it ** * **** *** – ** *** **** ********* *** **********?

*** ******** **** ** *** ********* ** ********* ***************/************** ************* ********* ******* ***** *******. **** ** *** ** is ****** *********** ****.

*******, ******* *** ***** *********** ***** *** ** ******. *** much *********** **** *** ** ********* ***** ******* ** ********** preferences ** ******* ** *** ******* ** *** ***** ***** captured. ******* *********, ********** *********** *** ****** ** ***** **** saving ** **** *****, ****** *** ****** **********.

**** ******* *** ******* **** *** **** ********** (*.*. ***** counts), *** ******* ***** ******* ***** **** ************* ******* ** differences ** *********** ****** ******. **** ** ** *******:

**** ******** ******* / *********** ********** *** **** ***** *******.

Limitations ** ********** *****

**** ** ******* ********* ******* ** ********** ** ***** ***** (which ** ********* **** ***), *** ***** ********* ****** ***** in ********* *****: ***** ** ********* *** ********** ******.

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

********** ** *** **** ******* ** ***** **, ** ***** to ** ** * ****** ***** ** '***' ******* ** a *******, ** ******* ****** *** ******* ***** *** ******. For ********:

angle comparison

**** ** *** ***** ** *** **** *** *** *** pixels ** *** *** ** *** *****, *** **** *** is ********* ** ****** *** **** ****** ******* ** *** subject. **** ** ********** * ********* ******* ** ****** ** cover * **** ******* *** **** * ****** ***** **** resolution ******. **** ** *** *** *** *** '*****' ****** of ******, ** * *** ** ******* ******** ** ************* to *** ******, *** *** *** **** *** ****** ** getting *** ******* ***** (********* *** * ******'* ****).

********** ****** / ********

********* *** ************, ************ *** **** ******* *** **********, **** almost ****** *** ****** *** *** *****. *******, ** *** amount ** ****** *** ********* ** ***** *** ******, ********** this *** ** ********. **** *** **** ****** ** ******* facial *** ******* ****** *******, **** ***** *** ****** ********* benefit **** **** ******. *** ***** ***** **** '*****' *** the *********** ******* ******* *** ****. **** ** * ***** consideration *********** ** *** *************** ******** **** *** ** *** '*****' ******.

Factors ********* **********

*************, **** ******* ****** ************ **********, *** ****** ******, **** as:

** *** ****** ********* ********** (*.*. ***** *****) ** *** one *** **** ******* ****** ** ** **** ****** ** great ********. ********** *** ****** ** *** ** ***** ******* to ****** *** ******* ******* *** **** ************.

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

**** **** * ******** **** ***

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

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