{"id":3004,"date":"2026-07-21T14:18:53","date_gmt":"2026-07-21T06:18:53","guid":{"rendered":"https:\/\/midradar.com\/?post_type=news&p=3004"},"modified":"2026-07-28T08:49:33","modified_gmt":"2026-07-28T00:49:33","slug":"how-to-calculate-eo-ir-detection-recognition-and-identification-range","status":"publish","type":"news","link":"https:\/\/midradar.com\/vi\/news\/how-to-calculate-eo-ir-detection-recognition-and-identification-range\/","title":{"rendered":"C\u00e1ch t\u00ednh ph\u1ea1m vi EO\/IR, Detection, Recognition v\u00e0 Identification"},"content":{"rendered":"

M\u00e1y \u1ea3nh t\u1ea7m xa<\/a> b\u1ea3ng d\u1eef li\u1ec7u th\u01b0\u1eddng tr\u00ecnh b\u00e0y m\u1ed9t kho\u1ea3ng c\u00e1ch ti\u00eau \u0111\u1ec1: ph\u00e1t hi\u1ec7n l\u00ean \u0111\u1ebfn m\u1ed9t s\u1ed1 km nh\u1ea5t \u0111\u1ecbnh, nh\u1eadn d\u1ea1ng \u1edf kho\u1ea3ng c\u00e1ch ng\u1eafn h\u01a1n v\u00e0 nh\u1eadn d\u1ea1ng \u1edf kho\u1ea3ng c\u00e1ch kh\u00e1c. Nh\u1eefng s\u1ed1 li\u1ec7u \u0111\u00f3 tr\u00f4ng c\u00f3 v\u1ebb d\u1ec5 so s\u00e1nh nh\u01b0ng ch\u00fang c\u00f3 th\u1ec3 g\u00e2y hi\u1ec3u nh\u1ea7m tr\u1eeb khi m\u1ecdi nh\u00e0 cung c\u1ea5p s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t m\u1ee5c ti\u00eau, b\u1ea7u kh\u00f4ng kh\u00ed, ti\u00eau ch\u00ed x\u00e1c su\u1ea5t v\u00e0 m\u00f4 h\u00ecnh ch\u1ea5t l\u01b0\u1ee3ng h\u00ecnh \u1ea3nh.<\/p>\n

D\u1ea3i EO\/IR kh\u00f4ng ph\u1ea3i l\u00e0 thu\u1ed9c t\u00ednh ri\u00eang c\u1ee7a \u1ed1ng k\u00ednh. N\u00f3 l\u00e0 k\u1ebft qu\u1ea3 c\u1ee7a m\u1ed9t chu\u1ed7i h\u00ecnh \u1ea3nh bao g\u1ed3m k\u00edch th\u01b0\u1edbc m\u1ee5c ti\u00eau, ti\u00eau c\u1ef1, kho\u1ea3ng c\u00e1ch c\u1ea3m bi\u1ebfn, \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u1ea3m bi\u1ebfn, truy\u1ec1n \u00e1nh s\u00e1ng quang h\u1ecdc, suy gi\u1ea3m kh\u00ed quy\u1ec3n, \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n gi\u1eefa m\u1ee5c ti\u00eau v\u00e0 n\u1ec1n, \u1ed5n \u0111\u1ecbnh, x\u1eed l\u00fd h\u00ecnh \u1ea3nh, \u0111i\u1ec1u ki\u1ec7n hi\u1ec3n th\u1ecb v\u00e0 ng\u01b0\u1eddi quan s\u00e1t ho\u1eb7c thu\u1eadt to\u00e1n ph\u00e2n lo\u1ea1i.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y cung c\u1ea5p m\u1ed9t c\u00e1ch minh b\u1ea1ch \u0111\u1ec3 ki\u1ec3m tra c\u00e1c c\u1ea5u h\u00ecnh camera v\u00e0, quan tr\u1ecdng h\u01a1n, gi\u1ea3i th\u00edch nh\u1eefng g\u00ec ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c minh trong qu\u00e1 tr\u00ecnh mua s\u1eafm v\u00e0 ki\u1ec3m tra nghi\u1ec7m thu.<\/p>\n

\"H\u1ec7

C\u00e1ch t\u00ednh ph\u1ea1m vi EO\/IR, Detection, Recognition v\u00e0 Identification<\/p><\/div>\n

 <\/p>\n

1. Detection, Recognition v\u00e0 Identification l\u00e0 c\u00e1c nhi\u1ec7m v\u1ee5 kh\u00e1c nhau<\/b><\/strong><\/h2>\n\n\n\n\n\n\n
c\u1ea5p \u0111\u1ed9 DRI<\/strong><\/td>\nC\u00e2u h\u1ecfi v\u1ec1 ho\u1ea1t \u0111\u1ed9ng<\/strong><\/td>\nV\u00ed d\u1ee5<\/strong><\/td>\n<\/tr>\n
Ph\u00e1t hi\u1ec7n<\/td>\nC\u00f3 m\u1ed9t v\u1eadt li\u00ean quan n\u00e0o c\u00f3 m\u1eb7t kh\u00f4ng?<\/td>\nM\u1ed9t v\u1eadt th\u1ec3 \u1ea5m \u00e1p c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y tr\u00ean n\u1ec1n.<\/td>\n<\/tr>\n
Recognition<\/td>\nN\u00f3 thu\u1ed9c lo\u1ea1i chung n\u00e0o?<\/td>\nNg\u01b0\u1eddi \u0111i\u1ec1u h\u00e0nh c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t m\u1ed9t ng\u01b0\u1eddi v\u1edbi m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n.<\/td>\n<\/tr>\n
Identification<\/td>\n\u0110\u00f3 l\u00e0 th\u00e0nh vi\u00ean hay lo\u1ea1i ph\u1ee5 n\u00e0o?<\/td>\nNg\u01b0\u1eddi v\u1eadn h\u00e0nh c\u00f3 th\u1ec3 nh\u1eadn d\u1ea1ng m\u1ed9t xe b\u00e1n t\u1ea3i thay v\u00ec m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n chung, t\u00f9y thu\u1ed9c v\u00e0o \u0111\u1ecbnh ngh\u0129a nhi\u1ec7m v\u1ee5 \u0111\u00e3 th\u1ecfa thu\u1eadn.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Nh\u1eefng \u0111\u1ecbnh ngh\u0129a n\u00e0y ph\u1ea3i \u0111\u01b0\u1ee3c vi\u1ebft v\u00e0o y\u00eau c\u1ea7u. \u201cNh\u1eadn d\u1ea1ng\u201d c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u \u00fd ngh\u0129a kh\u00e1c nhau \u0111\u1ed1i v\u1edbi c\u01a1 quan \u0111i\u1ec1u h\u00e0nh bi\u00ean gi\u1edbi, ch\u00ednh quy\u1ec1n c\u1ea3ng, s\u00e2n bay ho\u1eb7c \u0111\u1ed9i an ninh c\u00f4ng nghi\u1ec7p. Nh\u1eadn d\u1ea1ng khu\u00f4n m\u1eb7t, ph\u00e2n lo\u1ea1i lo\u1ea1i ph\u01b0\u01a1ng ti\u1ec7n v\u00e0 x\u00e1c nh\u1eadn r\u1eb1ng m\u1ee5c ti\u00eau \u0111ang mang v\u1eadt th\u1ec3 \u0111\u00f2i h\u1ecfi \u0111\u1ed9 chi ti\u1ebft h\u00ecnh \u1ea3nh r\u1ea5t kh\u00e1c nhau.<\/p>\n

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C\u00e1ch t\u00ednh ph\u1ea1m vi EO\/IR, Detection, Recognition v\u00e0 Identification<\/p><\/div>\n

2. B\u1eaft \u0111\u1ea7u v\u1edbi L\u1ea5y m\u1eabu G\u00f3c: IFOV<\/b><\/strong><\/h2>\n

Tr\u01b0\u1eddng nh\u00ecn t\u1ee9c th\u1eddi (IFOV) l\u00e0 g\u00f3c \u0111\u01b0\u1ee3c \u0111\u1ea1i di\u1ec7n b\u1edfi m\u1ed9t \u0111i\u1ec3m \u1ea3nh c\u1ea3m bi\u1ebfn. Trong ph\u00e9p x\u1ea5p x\u1ec9 g\u00f3c nh\u1ecf:<\/p>\n\n\n\n
IFOV (radian tr\u00ean m\u1ed7i pixel) \u2248 Kho\u1ea3ng c\u00e1ch \u0111i\u1ec3m \u1ea3nh \u00f7 Ti\u00eau c\u1ef1<\/strong>
\n<\/strong>K\u00edch th\u01b0\u1edbc m\u1eabu m\u1eb7t \u0111\u1ea5t tr\u00ean m\u1ed7i pixel \u2248 Kho\u1ea3ng c\u00e1ch \u00d7 IFOV<\/strong>
\n<\/strong>S\u1ed1 pixel tr\u00ean M\u1ee5c ti\u00eau \u2248 K\u00edch th\u01b0\u1edbc M\u1ee5c ti\u00eau \u00f7 (Kho\u1ea3ng c\u00e1ch \u00d7 IFOV)<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u1ea5t c\u1ea3 k\u00edch th\u01b0\u1edbc ph\u1ea3i s\u1eed d\u1ee5ng \u0111\u01a1n v\u1ecb nh\u1ea5t qu\u00e1n. V\u00ed d\u1ee5, b\u01b0\u1edbc \u0111i\u1ec3m \u1ea3nh 12 \u00b5m t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 12 \u00d7 10\u207b\u2076 m. Ti\u00eau c\u1ef1 300 mm t\u01b0\u01a1ng \u0111\u01b0\u01a1ng 0.300 m.<\/p>\n

Ph\u00e9p t\u00ednh n\u00e0y \u01b0\u1edbc l\u01b0\u1ee3ng vi\u1ec7c l\u1ea5y m\u1eabu h\u00ecnh h\u1ecdc. N\u00f3 ch\u01b0a bao g\u1ed3m m\u1edd, truy\u1ec1n ch\u1ee9c n\u0103ng quang h\u1ecdc, kh\u00ed quy\u1ec3n, nhi\u1ec5u, \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n, \u1ed5n \u0111\u1ecbnh ho\u1eb7c x\u1eed l\u00fd h\u00ecnh \u1ea3nh.<\/p>\n

 <\/p>\n

3. V\u00ed d\u1ee5 B\u1eadc Nh\u1ea5t \u0111\u00e3 Th\u1ef1c hi\u1ec7n<\/b><\/strong><\/h2>\n

Gi\u1ea3 s\u1eed m\u1ed9t camera nhi\u1ec7t kh\u00f4ng l\u00e0m m\u00e1t v\u1edbi:<\/p>\n