Resolution: 4K vs 2160p vs 8.3MP

Author: John Honovich, Published on Apr 24, 2015

4K, 2160p and 8.3MP all basically refer to the same 'thing', just different dimensions of it.

While total pixel count has historically been the most common technique (e.g., 1MP, 2MP, 3MP, 5MP, etc.), naming by vertical count (e.g., 720p and 1080p) have become more common in the past few years.

Now, naming by horizontal count / lines (e.g., 2K, 4K, etc.) is a growing trend.

In this note, we contrast the pros and cons of each element and how to best use them in designing surveillance systems.

**, ***** *** *.*** *** ********* ***** ** *** **** 'thing', **** ********* ********** ** **.

***** ***** ***** ***** *** ************ **** *** **** ****** technique (*.*., ***, ***, ***, ***, ***.), ****** ** ******** count (*.*., **** *** *****) **** ****** **** ****** ** the **** *** *****.

***, ****** ** ********** ***** / ***** (*.*., **, **, etc.) ** * ******* *****.

** **** ****, ** ******** *** **** *** **** ** each ******* *** *** ** **** *** **** ** ********* surveillance *******.

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

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

'*'

*** ****** **** ** *** *, ** ** **** *** 1080p, ***** ** *** ***** ****** ** **** ** *** video. * **** ***** **** *** *** **** ** ******. A ***** ***** **** *** **** **** ** ******.

*** '*' ****** ****** *** *********** (****** **********). *****, *********** all ************ ******* *** *********** **** ** *** '*' ****** does *** **** **** ** * **********.

'*'

*** *, ** ** *** **, ***** ** *** ***** number ** ******* ** * *****, ** ********* (**** *** K). * ** ***** **** *** ******* *,*** ******* ** pixels. ***********, ** ***** *** ****** **** **** ** **** rows, ******, ** ************ **** ** ****** ****** *** **** (note **** ** *** ***-* ***** **** ** *** ***).

** ** *********** **** *** ********** *** ******* (*) *** rows (*) *** ********* ******* (** '****' *** *, ** 'thousands' *** *). **********, *** ***** ** ******** **** ** surveillance ** ******** ******* *** ***.

'**'

** ** *** ***** ****** ** ******, ***** ** *********** the ****** ** ******* (*) ** *** ****** ** **** (K). *** ******* * ***** ****** ** **** ******* (*.*., **) x **** ****, ***** ** *** (*********** *.**** *** ********* expressed ****** ** *** ** *.***).

Which ** ****?

*** ***** ****** *** ************ ** ****** '*' ******* **** measurements *** *** ***** ***** ** ******** *****. *** *******,***** *******(*** / ***) ** ***** ** ********** *****. ** **** end, * ** ****** ******* ** ***** * **** *** difference ** ********** ***** *****, * *** ***** ** ***** density. *** *******, * ** ****** ******** ** *** ***** density ** * ** ****** ********** **** ***** *****.

*** ***** **** ******, ******, ** '*', ***** *** **** started ** ** ******** / ******** **** *** ** *******. Because ** ****, **** ****** **** *** ** ******** **** it.

** *** ********* ****, ******, ** ***** ****** / ***** the ******* ******. *** *******, * ** ****** ** ~*** and * ** ****** ** ~***. ****** **** *** * 'count' **** ******* *** *** ** ***** **********. **** ** because ** ********** *** ******* *** ****. *** ****** ****** often ****** **** **********.

A **** ** ***** **** / ********

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

*******, **** ****** ********* ************ ******* ******* **** ***** ***** rates. ** ** *******, ******** ******* * '**' ****** *** it ** ************* *** ***** ***. ******, ******** **** ** ******* * ** ****** (******* ~7,000 ******* / ********** ******) *** ** ** **** ********* at ~**** *** ********* ****** *********** ***** *** ****.

** *** ***** ****, **** ***** **** ** ** **** tolerant ** ***** ***** ***** **** ***** **********. *** *******, most ***** ****** ******* ***** **** ***** *** **** ***** be **** **** ***** **** * ***** ***** ****.

Image ******* **************

*******, ** ** ********* ** ****** **** ** ****, **** pixel ***** / ********** **** *** ***** ** ********* ***** quality (*.*., ****** ********* *********, *** *******).

**** ****** ***** ***** / ** ******* **** ******** **** wide ******* ***** *** *** ***** ** ** ** **** difficult ** ********* *** ***** ********** **** ******** **** *** and ***** *** ***** ***********.

Comments (22)

* *** ****** ***** *** ****** *** "*" *** **** an ********** ** *********** ******** ** ******* ** *** "*" of ********** ********? ***** ****** ********** ***** ***** *** ***** into * ***** ** *** **** ** * *** ********** it *** ***** ********* **** *** "*" *** ***** ******** Progressive?

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

** *** ****** ** *** * ** * ********** ** no ****** * ******** ******* ***** ********** ** ********* *********** now *** *** ****** ** *** ****** '*' ** **** context ** **** ***********.

*'** ******* *** **** ** **** ****.

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

**** **'* *p, it also refers to the number of horizontal lines to be scanned, or the vertical resolution. When it's an *, ** ****** ** *** ****** ** ******, ***** * fields = * ****. *** ********* *** *** ****** ** half ** *** *** ******** ********** ** *****. ****** **** that, *** *** ******** ** *** ****** **i in a camera sensor specification, since they are all pretty much progressive these days.

****, ***p I feel is the most descriptive because it implies a 9x16 aspect ratio. If you see 1080p, 720p or 2160p, you also know the horizontal component and therefore also the MP. On the other hand this also limits its use to primarily those aspect ratios.

"****, ***p * **** ** *** **** *********** ******* ** ******* * 9x16 ****** *****."

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

"**** ** *** ********* **** *** * ****** ** ***** display ***********. *** * ****** *** *********** ****, *.*. ***-**********. The *** ******* * ******** ********** ** *** ***** **** vertically ******** *****, ******* **** * ********** ********** ** *** pixels *** *:* ****** *****"

***, *** *** ******* ***** **** *** ***** ** *******, though **** ** ***** ** ******* **** *** ** ***** as **** ** ********** ****, ******* **** ****** *** **** common *******.

*** ****** ***** ******* ******, ***** ** ******* ** *** indicate, * ************* ********** **********.

******* **** ** ** **** ** **** **** *** ******** is *** **** * ** ** ***'* ** **** ** either. ****** **** *** ** ****** *** ****** ********** **** the ******** ******** ***************. ;)

*** *** **** ** **** ** ** ** ****** **** 4k *** **** **** * *** ** ** *********** *** being ******** **** **** * *** ** ***. **** **** I **** ** ******* **** ***** ********** **** ** ******** and * **** "*******"

**** **** * **** ** ******* **** ***** ********** **** 13 ********...

* *** * **" ***** ***, ***** ******, ** ******* 1. ;)

@**** ... ****'* *****! **** * *** * ***, * WAS *** *******!

****, ** ******* * (** ***** ******* *) **** ** the *** ********. ***, **** *** * **** **** ***.

* ******* *** **** *********** ******* *** ***** "*******" *** "rows" ** *** ** ********* *****...******** *** ***********. ******* ******* though.

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

** ** ****** *******, * ******* *** ***** **** ****, 1080p, **, ***. ****** ** **** **** ** **** **** HD *********, ** **** **** ****** ******** **********. **** ******* of ****, ** ***** **** ****. ** ** ********* **** all ** **, ******, ** ******** **** **** ** ** used, **** ** ** ********** ********* ** **** *** ******** format. *** ********, *** ************* *** **** *********, *** *'** also ***** ** **** *** ***** (*********** *.***) *** ** all **** **** *** ***** ******* ******* ***** *** *********** are *** *** ****.

"*** ********, *** ************* *** **** *********, *** *'** **** heard ** **** *** ***** (*********** *.***) *** ** *** know **** *** ***** ******* ******* ***** *** *********** *** not *** ****."

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

**** * **** ** * ********* ****** ***** **** **** x **** *** * ** *** **** * ***** *** one *** ****** ** ***** '***** *******' **** *** *****.

******** *** *** ***** ** *** ****, ***** ******* ********* provide ******* ****** ***** ** ** **********....****** ** *** *** cameras, *** ******* *** ***** ******.

* ******* *** ***** ** ****** **** ******* **** **** x **** ******* *** ***** ****, ***** ***** *******, **** might *** **** **** ***, ***.

**** ***** ******* *** ********* ** ***** *******, *** ****'* not ******** * ****** ** *** ***** ***** / **********.

******** *** *** ***** ** *** ****, [*****]***** ******* ********* provide ******* ****** [**** *********].

*********** ****'* **** ** ******, ******* **** ********** *** ***** increase ** **%. ****/****.

*** *** ***** *** *** ***** **** *** ****? ******** the ***** ****** *** ******'* ***** **** ** ********, **** FOV ***** ** ***** ** **% *** **** *** *** would *** ** ***** *** ****, **?

*********, **** ***'* ** ***-********* *********, *** * ***** * had ******* **** ******** ***** **** ****. **** ***** **** not, * *** *** *** ********** **** ** ***** **** height. ** ***** ** ****** *** *** **** * **** wide ***, ***'** *** **** ****** *** **** ***** * 1080p ****** **** * ********* ******...****'* ***** ****. **** ****, there *** ******** ********** ******* **** ** ******, **** *********, where **** ***** *** *********** *****, *** ****'* *** ** common ** *** *********** ******* * ****.

*** ***** ** ** ******** **** ****'* ** **** ** all-encompassing **** *********** ******* ** *** ************ -- **'** *** beyond ****. *** ** *** ********** ***-*****, ***** *** ** a *********** *** **** ***** *** ********* **** ***** ********* because ******* *** ********** ******* **** ***,*** ****** (******* **** the ***** ***** ** * *** *****), *** ********* ***** density (****) **** ** ****** **** ***** ******* ******** ** 1600x1200 ***.

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

"*** ********* ***** ******* (****) **** ** ****** **** ***** cameras ******** ** ********* ***."

*** *** ***** **** ******** / ********* **** ** ****, assuming *** **** *** *****, ******* *** **** * **** will **** * ****** ***.

* ***'* ***** **** ** * **** ***** *** * am ******* ***** ******* ********** **** ***** *** ********** ********** provides '******* ******' **** *******.

**** ** *******, *** *****, *'** **** **** *********...**** ***** than ***...***** **** ** *** ***** ****** ****** * *** image ** ****** ** *** ** **** ******* ***** ******. If * ******* *** ***** ** ******** *** *** **** aspect ***** *****'* ******* *** ********* *** ******, **** * would ***** *** **** ** **** ** * *** (** 3.1 ********* ** *** ************) ** ***** ** ******** *** same ****** *** ****, ** ***** *******.

**** ** *******, ** *** ***** **** ****** ***? :-)

** **** **** ******* ** **:* ** *:* ****** ******. See****** ***** **:* ** *:* ********. **** ***** *******, * *** ********* ***** *** **** situations * *** *** ******** **** *** '******' *:* ****** ratio.

*** ****** ****** ** ******* ** ** '*** ** **** ceiling *****' ** ** **** ** **** *** ** *** more ** *** **** ***** ***.

***** *******! * ***** *********, ****** * ** ***** ******** that ***** *** ** ******** ***** (****, *****, **) ** preferable **** ********** ***** ** *********** **** **** **** ********** (aspect *****, ***** ****), **** ** (***, ***, ****, ***.) when *** ** ******** *****'* *****.

** *** ***, * ***** *** **** * ** ********** your ********* ** ******* *** *** ******* *** ****** ****** go. * *** ***** ********* **** **** ********, *** ****'* always ********.

******.

* ***** *****'* ***** ** ***** ** ******** *****. *** problem, ** ** ********* ***** ** *** ******** ****, ** that **** ** ************* *** *** ***** ***** ***'* **** the ******** (*.*., *** ******** **'* ***** ****). **** *** get **** *** **** ****** *** ****** ***** :)

**** ** *** "*" ********* ** *** *******:

"******* (*) *** **** (*)"

***** ** *** ***** *********, "*" (****, ****, *****) ****** to ****. **** **** ** ****** **** **** *********.

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