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An installer needs a camera to monitor a hallway in an office complex. The hallway is 2.5 m (8 ft 2 in) wide. The customer wants to be able to identify people (80 pixels per face). What is the minimum resolution needed to meet this requirement?
Suggested Answer: B
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To identify people with 80 pixels per face in a hallway that is 2.5 meters wide, a minimum resolution of 1280x720 (720p) is needed. This resolution ensures sufficient pixel density to capture detailed facial features necessary for identification purposes. Given the width of the hallway and the required pixel density, 720p provides the necessary coverage and detail.
26 comments · newest first
AM
Ammie
10 months ago
Surprised that 1024x768 is even an option here.
SU
Suzan
10 months ago
800x600? No way, that's way too low!
ON
Oneida
10 months ago
I think 1280x720 should be enough for face recognition.
CH
Charlene
11 months ago
Definitely not, you need at least 1920x1024 for clarity.
WA
Wayne
11 months ago
I agree, 1920x1024 seems like the best choice.
CA
Carey
11 months ago
I’m pretty sure 800x600 is too low for identifying faces, but I can't recall if 1024x768 would be enough.
KA
Karan
11 months ago
I feel like 1920x1024 could be overkill, but I guess it might be necessary to ensure clear identification.
RE
Reita
12 months ago
I think we practiced a similar question where we had to determine resolution based on distance and width. I might lean towards 1280x720, but I'm not completely confident.
CL
Claribel
12 months ago
I remember something about pixel density and how it affects face recognition, but I'm not sure how to calculate the exact resolution needed.
AM
Ammie
12 months ago
This seems like a tricky one, but I think I can tackle it. I'll need to do some calculations to determine the minimum resolution that meets the customer's requirements.
SA
Salome
1 year ago
Alright, I think I've got a strategy. I'll need to figure out the pixel density required for 80 pixels per face, then calculate the minimum resolution based on the hallway width. Let's see if I can work this out.
PA
Pamela
1 year ago
I'm a bit confused on how to approach this. Do I need to calculate the pixel density or something? I'm not sure where to start.
VA
Van
1 year ago
Okay, let me think this through. The width of the hallway is 2.5 m, and we need 80 pixels per face. I wonder how that translates to the minimum resolution needed.
MA
Marci
1 year ago
Hmm, this seems straightforward. I just need to figure out the minimum resolution required to get 80 pixels per face in a 2.5 m wide hallway.
RO
Rosalind
1 year ago
I think D) 800 x 600 is too low of a resolution for identifying people, so it's not the right answer.
AL
Aliza
1 year ago
I'm not sure, but I think C) 1920x1024 might be better for even clearer images.
IS
Isaiah
1 year ago
I agree with Arlene, because 1280x720 would provide enough resolution to identify people clearly.
AR
Arlene
1 year ago
I think the answer is B) 1280x720.
SY
Sylvia
1 year ago
Ooh, this is a tricky one. I'm leaning towards C) 1920x1024, but I better double-check the calculations just to be sure.
GE
Georgene
1 year ago
Ha! I bet the installer wishes they could just use a smartphone camera. That would be so much easier than worrying about resolutions and stuff.
JO
Joanna
1 year ago
I'm not sure about this one. The hallway dimensions make me think D) 800 x 600 might be the right answer, but I could be wrong.
TH
Thurman
1 year ago
I think B) 1280x720 would work well too, providing good quality images.
LE
Lennie
1 year ago
A) 1024x768 would be the best option for clear identification.
NA
Naomi
1 year ago
Hmm, I think the answer is B) 1280x720. That should give us the required resolution to identify people with 80 pixels per face in a 2.5 m wide hallway.
DO
Dorothy
1 year ago
User 2: Yeah, that sounds right. It should work well for identifying people in the hallway.
EA
Earleen
1 year ago
User 1: I agree, B) 1280x720 should be enough for the resolution we need.