Camera Video Display Problems Tested

Author: Ethan Ace, Published on Mar 18, 2016

In the old days, displaying video was simple. Both cameras are monitors were generally the same aspect ratio, so it was fairly simple to display video without any problems.

Now, though, with various aspect ratios (16:9 monitors, 4:3 cameras, 16:9 cameras, fisheye streams, multi-imagers, etc.), this is becoming much more difficult.

Indeed, many VMS clients are now defaulting to cropping or warping video by default.

In this report, we look at this problem and share examples of how Axis, Dahua and Hikvision do this.

** *** *** ****, ********** ***** *** ******. **** ******* are ******** **** ********* *** **** ****** *****, ** ** was ****** ****** ** ******* ***** ******* *** ********.

***, ******, **** ******* ****** ****** (**:* ********, *:* *******, 16:9 *******, ******* *******, *****-*******, ***.), **** ** ******** **** more *********.

******, **** *** ******* *** *** ********** ** ******** ** warping ***** ** *******.

** **** ******, ** **** ** **** ******* *** ***** examples ** *** ****, ***** *** ********* ** ****.

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

Cropping *******

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

******* *** *** ****** *****, ****** *** **** ** '*****' the ****, *** *** *** ****** *** *******:

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

Stretching *******

******* *** *** ****** *****, *** ******** *** ** * 16:9 ****** ***** ****** *** *** *** ******** ** ***** / *********:

 

** *** ********** *****, *** *** *** *** *** *** is **********:

*********

********* *** ****** ****** *** ****** ****** *****. ** *******, ********* cameras, ****/****, *******-**** ****** ******* ***** ** *** ******, ********** ** ****** *****. *** entire ***** ** ******* (****** ****, *****, ***** ***** ***** of *** *****), *** ********* ** **** *****.

**** *** ** ******* ** ******* ****** *****, *** *** option ** ****** ** ******** (**** > ****** ************* > Image > **** ***** > ******** **********). *** ***** ***** ***** the **** ******* ** *****, *** **:*, ** ***** ****** aspect.

Axis ****** *******

** ******* ****** ******* * ****, ******* *** *** ** "****" *** **** ** *******. This *********** ***** **** *** ********** ***** ** *** ***** ** fit ** *** ***** ** *** ******* ****. *******, ***** at *** *** *** ****** ** *** *** *** *** off.

**** *** ** ******* ** ************* ** *** *** **** image ** *** ****, ***** ******** *** **** ***, *** results ** ******* ****** ** ***** ***** ** ****** ****, seen *****. *******, ***** **** ******, ** ***** *** **** FOV ** ******* *** ****** ***** ** *********. 

 

*****

** ***** *** **********, ****** ***** ** *** *********, ******** client ******** ******** ** "******** ****** *****", **** ******* ** stretch ** ****. **** *** ****** ** ******* ********** ********* on *** ****** ****** ***** *** ****.

*** *******, *** ********** ***** *** ***** **** *** *** interface ** ****** ** *****. ********** ** *** ****** ******, ***** ** ***** ********* to **** *** ***** ** *******, ********* ** ******** ** stretched *****. ***** *** ******** ** **** ***** ** *** original ******, *** **** *** *** **** ******* *** *** users *** *** ******* **** *** **** *****.

The ********

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

  1. Monitors *** **:*, *** **** ******* *** ***: Though many would like to proclaim HD and 16:9 formats as the way to go, 4:3 models are still commonly used (and arguably provide more useful images), including 3 MP, 5 MP, and now 12 MP resolutions. It will be years before 4:3 is no longer available.
  2. UI ******** **** ** *****: Toolbars, Windows and Mac task bars, event lists, and other UI elements take up screen space, meaning even if the VMS client is run full screen on a 16:9 monitor with 16:9 cameras in a split view, these controls may take up space and skew the aspect ratio of viewing windows.

****** ***, *** ******** ** ** **** ********** ****** ****** ratio. ****** **** *** ******** **** ******* ******* "********", **** ultimately ******* **** ****** ********* *** ** *** ****** *****. Blank ***** ******* ***** ** * ****** ******** **** ******* distorted *****.

Comments (7)

****** **** *** ******** **** ******* ******* "********", **** ********** detract **** ****** ********* *** ** *** ****** *****. ***** space ******* ***** ** * ****** ******** **** ******* ********* video.

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

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

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

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

** *** ***** ** **** *** ******* ** ** *** way, ***** * **** *** **** ****** *****.

** *** ***** ****, *** **********/********** ** *** ***** ******* by **** ******* ** *** **** ***/*****, ** ********* **** could ********** ****** ** *************. ** *** ***** ***** ***** distortion?

***** * ****?

"** *** ****** ******* ** *** ******* **** ************?"

* *** ********** *** ********* *** ********* ** ******* *** the ******. * ** ***** *** ******* ****** ***** **** improve ************** ** **** ******. *** ******* ** ******* *******'* "build", ** ****** ** *** ****** ***** ** *******.

* **** ** **** ******* *** ********* *** *********. **'* difficult ** ******** ****** **** ***** *** ***** ********. ** is *** ** ** *** ****** **** *****'* *** ********* for ** **** ** *** **** **** ***. *** ***** thing * ***** ** *** "********" ******* ** "********" ****** ratio.

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

**********. *** ** **** ** ********* ******* **** **** * user *******?

*** ******** ***** * ***** **" **** ** **** ** a ***** ****, ***** *** *** ******* ********* ******* ****** from ****** *** **** ****?

****:

**

****** **** "** ******* ** *** *** ** *** ****?" are ****** ** **** *** ******* ***** *** **** ****** displaying ****. *** **** **** *** ****** *** ****** ****** than **** ****** ** *********** ****.

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

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

* **** * ********* **** ************* *** ********** *** ***** feed ** *** *** ****** **** *** *** ****** ** security ********** (** ** **** ***** ******* ***** ******). ** someone ** ******** *** ***** **** ** ******** (*** *** time), ***** ***** **** ****** **** **** ***. ** **** aren't ******** ******** (*** *** ****), **** **** ******** ******** is *** **** ********* *** *** ******. ** * **** incident ******** *********, ************ *** ****** ***** ** ********** ** in **** ** ****** ******* *** ************.

** *** ****, ******** ** ********* *** ***** ** *** two. ********** *********** ** ***** **** ************ *********** (***** ** no **** ** *********** **** *** ******* *** ***** ** fit *** ****** - *** *** ********* ** ****).

* ***** ** ******* ** *** ** ********. * ******** professional ***** ** **** *** **** ****** ** *** ***** and *** ****** *****.

* ******* "*** ****" *** **** **** **** ***** **** are ***. **** ** *** *** *** ** ** *** and ******* **** *** *:* ** **** * *** **:* expensive ****. **** ***'* **** ** *** "****** *****" ** their *** *******. **** ** *** ******* *** ****** ********** - *** ** * **, **** **** ******** **. * think **** ** ***** ********* *** *** ****, *** ********** giving **** *** ****** ** *** ********, ** **** ** the **** ***** ** ***** ********* ** ********...

** ******, *** ****** *** ** ***** ****** ******, *** there *** ***** ***** ****. *** **** ** ***** *** stretched ** ********* ******* **** *** ****** ***.

*********** *****! * ***** ************ ***** **** **** * ***, so * ***** ***** *** ** ** ***** ******. **********, I ***'* **** ******** ** ***, *** *'* ********* **** ACS **** **. ** ** ****** ** **** ******* *******' Web **********, ******... ** **** ** *** ***** ***' ******* (Genetec, *********, *****...) **** ***?

***** *** ******* *** ******* ** *******, * ******** *** tendency ** ** *** ********, *** ******, ******* ***** ******** since ***** **** ******** ** **** ** **** **** ****, so ************* **** ** ********* ** **** *** ******* *** disappoint ****... ** *** **** ** *** ********* ****** ** this ******, **** *** ** *** **** *******?

****** *** *** *******!

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