It's finally arrived my first Ipcam, a Dahua IPC4421 with 3.6mm, firmware xxx.010R
I wanted to know how much difference there is from the max 2688x1520 to the classic 1920x1080 and intermediary res, 4MP and 3MP.
So I recorded with H.264H and extracted some frames and compared them.
Here the results:
https://imgur.com/a/EyCxH
The books for text comparing was at about 5m from the camera. The bigger text letters are between 7,5cm-4,5cm tall.
The Mb was the max available CBR, directToDisk in BI.
Just for fun, I uploaded also an old HP-USB (hp-4410) webcam at 1920x1080 (it seems similar lens, too): that is a great difference quality! Anyway it has its advantages: it's so tiny, you can hidden it marvellously.
To me it seems there is little increase in quality from 1920x1080 in the 3MP, but 4MP and more does seem to change nothing. BUT also in 1920x1080 you get pretty all the details you need: that could be a big CPU saving for BI!
So, at this point, why let's use 4MP res??
It's a pity that 4MP quality isn't there in major res and bandwidth... Maybe it should necessary a lot more Mbit in the higher res than 10Mb/s?
I wanted to know how much difference there is from the max 2688x1520 to the classic 1920x1080 and intermediary res, 4MP and 3MP.
So I recorded with H.264H and extracted some frames and compared them.
Here the results:
https://imgur.com/a/EyCxH
The books for text comparing was at about 5m from the camera. The bigger text letters are between 7,5cm-4,5cm tall.
The Mb was the max available CBR, directToDisk in BI.
Just for fun, I uploaded also an old HP-USB (hp-4410) webcam at 1920x1080 (it seems similar lens, too): that is a great difference quality! Anyway it has its advantages: it's so tiny, you can hidden it marvellously.
To me it seems there is little increase in quality from 1920x1080 in the 3MP, but 4MP and more does seem to change nothing. BUT also in 1920x1080 you get pretty all the details you need: that could be a big CPU saving for BI!
So, at this point, why let's use 4MP res??
It's a pity that 4MP quality isn't there in major res and bandwidth... Maybe it should necessary a lot more Mbit in the higher res than 10Mb/s?
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