DORI trong CCTV
Nam vung bon cap do DORI de thiet ke he thong CCTV dap ung muc tieu an ninh. Tu phat hien den dinh danh -- hieu nhung gi moi cap do yeu cau.
Muc luc
DORI la gi?
DORI la viet tat cua Detection (phat hien), Observation (quan sat), Recognition (nhan dien) va Identification (dinh danh) -- bon cap do tien trien cua do ro hinh anh trong he thong CCTV. Moi cap do xac dinh muc do ban co the thay chi tiet nguoi, vat the va hoat dong trong khu vuc giam sat.
Chon cap do DORI phu hop cho moi camera la rat quan trong. Qua muc chi tieu se lang phi tien; khong du se khong dat muc tieu an ninh. Hieu DORI giup ban tim su can bang.
Cap do phat hien
Phat hien la cap do co ban nhat: ban co the thay co vat the hoac nguoi hien dien, nhung khong biet them gi. Ban biet co chuyen dong, nhung khong the xac dinh do la gi.
Yeu cau phat hien:
- Kich thuoc pixel: 40+ pixel tren met
- Ban thay gi: Chuyen dong, hinh dang, su hien dien
- Ung dung dien hinh: Giam sat khu vuc rong, chu vi
- Loai camera: Camera 2MP tieu chuan
Cap do quan sat
Quan sat cung cap nhieu chi tiet hon. Ban co the xac dinh cac dac diem co ban: do la nguoi hay phuong tien? Mau sac gi? Huong di chuyen chung nao?
Yeu cau quan sat:
- Kich thuoc pixel: 20-40 pixel tren met
- Ban thay gi: Loai, mau sac, huong di
- Ung dung dien hinh: Bai dau xe, loi vao toa nha
- Loai camera: Camera 4-5MP
Cap do nhan dien
Nhan dien cho phep xac dinh nguoi hoac vat the cu the neu ban da biet ho. Ban co the nhan ra nhan vien cua minh o bai dau xe hoac xac dinh phuong tien cu the.
Yeu cau nhan dien:
- Kich thuoc pixel: 10-20 pixel tren met
- Ban thay gi: Net mat, chi tiet quan ao
- Ung dung dien hinh: Cua hang ban le, loi vao
- Loai camera: Camera 8-10MP
Cap do dinh danh
Dinh danh la cap do cao nhat. Ban co the xac dinh nguoi ma chua tung gap. Net mat du ro de dinh danh, va bien so xe doc duoc hoan toan.
Yeu cau dinh danh:
- Kich thuoc pixel: 5-10 pixel tren met
- Ban thay gi: Chi tiet khuon mat, ky tu bien so
- Ung dung dien hinh: Ghi nhan bien so, nhan dien khuon mat
- Loai camera: Camera chuyen dung 12MP+
Bang so sanh DORI
| Cap do | Do phan giai | Khoang cach dien hinh | Ung dung |
|---|---|---|---|
| Phat hien | 2MP | 40+ met | Chu vi, khu vuc rong |
| Quan sat | 4-5MP | 20-40 met | Bai dau xe, loi vao |
| Nhan dien | 8-10MP | 10-20 met | Ban le, loi vao |
| Dinh danh | 12MP+ | 5-10 met | Bien so xe, khuon mat |