Which 8MP Dome camera & NVR to select for AcuSearch & Face Comparison?

[accurate50]

Hi Everyone,


I currently have 2pcs of DS-2CD2183G2-IU,
DS-KV6113-WPE1(B) doorbell
DS-KH6320-WTE1 screen,
with a iDS-7216HQHI-M2/XT DVR

I wish to buy ~12pcs of 8mp dome fix lens CCTV, 3pcs of 12mp fisheye CCTV & a NVR for my retail store.
I want the below functions
1. AcuSearch function. To detect where have movement, & then select a particular person & show all footage of him appearing, among different cameras.
2. Face Detection, Recognition & Comparison. I will enter names for the faces appearing in my shop, then when the customer visit again, it remind me their names.
3. Highest resolution CCTV
4. Long storage, ~6 months – 1 year, for 16pcs of 8mp camera footage, 7 hours per day, & motion detection for the rest.

Below is my selection of CCTV
Fixed lens:
DS-2CD2183G2-IU
DS-2CD2186G2-I(SU)
DS-2CD2187G3-LI(S2U)Y
Face Recognition
iDS-2CD71C6G2-IZ(H)S(Y)
Fisheye:
DS-2CD63C5G1-IVS

NVR
iDS-7732NXI-M4/16P/X
DS-9632NXI-M8/VPro

Questions:
1. Which fix lens shall I select? Can 2183 fulfill all my needs? Is the Acusense & AcuSearch accuracy same as 2187? (2183 has human detection. so it has AcuSearch?)
I know 2186 has dark fighter, Acusense. 2187 has ColorVu, But I don’t need ColorVu, or dark fighter since its indoor with good lighting.
I know that the 2183 doesn’t have Face capture. But in the setting, I saw the button enable face detection, photo of setting of 2183 as attached.
Does it mean it have face capture? What is the face recognition accuracy compared to iDS-2CD71C6G2-

For Face capture & face recognition, What is the speed, accuracy & function difference by using 7732NXI NVR with 2183 cctv, compared to using iDS-2CD71C6G2-IZ(H)S(Y) with 7732NXI or 7732NI? Since the 71C6 camera captures 7 face features, is it the 7732 NVR also doing the same thing?

Is it better that the camera has AcuSearch, Face Recognition, instead of doing in NVR since it is slower & less accurate? If so, shall I buy a NVR without these features? Eg 7732NI-M4 16P?

2. I want to buy the 7732 NVR, I tried putting a 22TB Ultrastar to the 7216 DVR, & it works. Does it mean 22TB or 24TB Ultrastar will work on 7732 NVR? With 80TB, H265+, 8mp * 16 camera, 7 hour per day, storage can be 1 year, then 4 harddisk is enough, no need 9632.

3. I cannot find & add the doorbell DS-KV6113-WPE1(B) in iDS-7216HQHI-M2/XT DVR. Is it not possible to do face detection & recognition from the doorbell & add it to iDS-7732NXI-M4/16P/X NVR? (I can find the doorbell in iVMS4200.) Can I see the face comparison results & names on hik-connect?

4. DS-2CD2186G2-I(SU) & DS-2CD2186G2H-I(SU) anyone know what’s the difference of the enhanced feature?

5. Do these cameras have 2-way audio, with build in speaker?
DS-2CD2186G2-I(SU)
DS-2CD2187G3-LI (S2U)Y
iDS-2CD71C6G2-IZ(H)S(Y)
DS-2CD63C5G1-IVS

Thank you very much for your help.

 

[accurate50]

I am not able to see the face recognition & face capture options in the VCA engine of 2183.
It only have 1 check box for face capture.
So I think is it 2183 does not support face capture, I have to go for 2186 at least? 2186 stated it support face capture in the spec list.
But then what is the face capture effect difference compared to 2CD71C6G2-IZ(H)S(Y)?