Pixel Requirements For Text Legibility?

I met with a client this week that has some specific requirements for a cashiering function. They would like the cameras mounted above the cashiers to capture text on certain documents, not just bill denomination. They specifically asked for the ability to forensically read 9pt font.

Outside of managing expectations around privacy concerns and who would have access to the recorded...

, ***, ***; **** ****** ** * **** ***** *** me ** ********* ****** ***** ** -What ****** ** ****** ******* *** **** ******* ** **** ********** *** * ******* **** ****? How exactly do we define legibility (based on assumed 20/20 vision of the human looking at the image of course)?

* ***'* *** **** *** ************ ** *** ****** ***** surface *** ******** **** *** ******* ** ***** *** **** project, *** *** *** **** ** ************ * ********; ***'* say **** *** ***** ******* **** ** *' * *' 6", *** *** ******** **** *** ****** ** *** ****** surface ** *' *".

**** ********** *** **** ** ******** ** ******* ********** ** 9pt **** ** **** ******** ****** *** ****** ****** ****? What ***** ** ** **** ****? *** ****** *********** ** can *** ** ***** ** ** **** ***** ** * different ****** **** *** ****** ********?

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

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*****, **** *********** ********! ** *** ***** ** ** * test ** **** **** ** *** **** **** *** ******* full *******.

*** ******** / ******* - *** ***, "*** *** **** of ************ * ********; ***'* *** **** *** ***** ******* area ** *' * *' *"

*** *** ** **** *** *** ***** **** **** ******* most ****** **** **** ***** ******** *****? *** *** ***** to *** ***+*** **** * ** ****** ** **** **** which * *** **** ** **** ******.

**** * ****, ** *** ***** ** **** *** *** how **** ** *** ** *** ***** *** *** ****.

****'* *****! * ****** **** ******* ** ****** *** *******.

*'* ********** **** **** ********** *** *** *** * **** - * **** ******** ****'* ***** * ***** ** **** to ** ** ******* ***** ***** ***. *** *** * provided *** ** ******* ** **** * ******* *** ** the "***********" **** (***** ******/****/********* ***** ** ******) ** *** surface ** * ******* **** ****** ******* (*** **** ** station *** ** ******* *******), *** * **** **** * typical **** ** *********** ***** ******** ** ****** ** * retail ***** ***********. ** ***** ** ***** ** ** ***** get * ****** *** ******* ****** ** ***** ** *** resolution ************.

*'* ****** **** ***** ** *** ****, ** *** **** a *** ***** ** ***** *** *** ** ** **** and ***** **** **** ********** ** ****** ** *** *** legibility *********** *** ******* ***** ** ****.

* **** ****** ** **** ***** ***** * ********** **** in ********** ** ****? ******* ********* **** *** **** ****.

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

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*** *********, * ***** ** */** ** ** ****. **'* not ******** ** *** ********** ********* *** ***** ********* ****, so *** ***** ********** ****** ** ** **** ** ******* a ********* ** ** (***) ******. * * ***** **** is */*" ****, ** **** ***** ** * * *****, 8x6 ********* ***** ** */** ** ** ****. ** **** is ******** ***** *** * */* **** ****, **** ******** that **** ****** ****** ** ********. ***** *** * **** axis, **** ****** ****** ** ********.

**** ***** ** ****** ** ** ********** ** ***, **** a ***** ** **** ** ***** ** * ***** ** video. *** ***** ******* **** ***** ****** ***** *** ******* 50% ****** **** *** **** ****** ***** ******* ** ** 2x ******* ********** ** *******. ** **** ** *** ****, still, *** ***** ****** **** * ** ** ****** ****** be ********.

*************, ******** ******** *** ********* *** ******** ******** ** *** dpi, ***** ***** ******* *,*** ****** ****** * */* ****: not ********** ********** **** *****'* ********** *******. * ***'* ****** the **** ********** **** ******** **** ******, *** * ********* to *** *********** ****** **** ******** **** **** ** **** signs *** ******* ** ********. * *** ********* ** ******** that ******** *** ******** **** ** ***** ******* *** ***** Finereader ***** *** ******* **** **** * ********* *****, **** though ****** *** ** ********** ***** **. ** **** * do *** **** **** *** **** *** ******** ** ********** garbage **** *** **** ** *** ***** (**** *** **** I *** ******** ** ********). ******* * **** **** ***** was ** ********* ** *** ******' **** ************ ******** ** the ********* *** ****. **** ********* ** * ***** ****. It ***** **** ******** *** ******** ******* **** **** ******** with *** ***********, ** * ***** ****** ********* *** ** be * ****** *** *** *** **** ***********.

*** ********* **** *** ******** ****** **** ** ********, ******** motion, ** **** ***** **** ******* ************ ** ******* ******** to *** ******, ***** ***** ******* ********* ***** ***** ***** and ********** ******** *** ******** ***********.

***********, ** **** *** ******* ******** ** ************* ** *** camera, ***** ********* ****** *** ******* ******* ****, * ***** want ** ***** **** ** ** (******* ** ** **** dimension) ** ******* *** **** ******* ****** ** ***** ******. I ***** ****** **** ********* *** **** ****** ****** ********** accessible ****** ***********, **** ** ********** *********** ** **** ********* were *******.

** **** ** *********** ** *** *** ****'* ********** ****-***** testing ****** **** ***** ***********.

**** ******** *****. *** ** * ***** *** ****** **** just ***** ******* ** * *****, ****** * ******. * think *** ** ** ****** **** ******* **** ******* **** the *****. ** ****** **** *** **** ****** ** ** exception *****. **** *** ********* ***** ******** ******* * ****** limited ********** ** **** ***** **** ** ******. ** *** the ***** ****** ***** *'* ********* *** ***** **** *** could **** *** ** *** ***, **** ******* ** *** video *** ***** *** ******** ****** ** *** **** ******** at ****** ******* **** *** *** **** *** ****** **, as **** *** **** **** *** ******* ** ***** ****** not ** ****.

******, ***** ******** ******. *** ** ******* ******; ** **** particular *********** *'* *** ** **** ********* ***** ******** *********** of *** **** ** * ** ***** * ***** ***** able ** ****** ******** ***** *** **** *** *** ***** or ******* ** * ******** ****** *** ****** **** **** a ****** **** ****** ** ********. *** **** **** ****** a *********, ******, ** ****** *** ***** ***** **** ** legibility, *** * ****** **** ** ****** ***** **** *** requirements *** ** ***** ***** *** ** **** *****...

******* *********** ****** ********** ** * ******** ***** *********** *** basic ********** ** **** **** **** *** ***** ***. **** that ********, * ***** ** ****** ** **** ** ******* forensic ********** (****** *** *** ********** * ****** ** *** orginial ****) **** * *** ****** ** *** ************ ** 1000 ***.

** *** *** ** *** *** ****** - * **** no **** ******* * **** ***** ****! ********** ******* ******* to ****** **** *******.

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