![\"C\u00e1c](\"https:\/\/vtcnetviet.com\/wp-content\/uploads\/2023\/03\/OCR-la-gi-1.png\" "\\"C\u00e1c")
<\/figure><\/div>\r\n\r\n\r\nC\u00e1c m\u00f4 h\u00ecnh nh\u1eadn d\u1ea1ng OCR th\u01b0\u1eddng th\u1ea5y<\/em><\/p>\r\n\r\n\r\n\r\n<\/span>So kh\u1edbp m\u1eabu<\/strong><\/span><\/h4>\r\n\r\n\r\n\r\nSo kh\u1edbp m\u1eabu l\u00e0 t\u00e1ch bi\u1ec7t m\u1ed9t h\u00ecnh \u1ea3nh k\u00fd t\u1ef1 (h\u00ecnh d\u1ea1ng ch\u1eef) v\u00e0 so s\u00e1nh v\u1edbi h\u00ecnh d\u1ea1ng ch\u1eef \u0111\u00e3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u01b0\u1edbc \u0111\u00f3. T\u00ednh n\u0103ng n\u00e0y ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 khi h\u00ecnh d\u1ea1ng ch\u1eef trong kho l\u01b0u tr\u1eef c\u00f3 ph\u00f4ng ch\u1eef v\u00e0 t\u1ef7 l\u1ec7 t\u01b0\u01a1ng t\u1ef1 v\u1edbi h\u00ecnh d\u1ea1ng ch\u1eef \u0111\u1ea7u v\u00e0o. Ph\u01b0\u01a1ng th\u1ee9c nh\u1eadn d\u1ea1ng v\u0103n b\u1ea3n n\u00e0y ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 \u0111\u1ed1i v\u1edbi h\u00ecnh \u1ea3nh qu\u00e9t t\u1eeb t\u00e0i li\u1ec7u \u0111\u00e1nh m\u00e1y b\u1eb1ng ph\u00f4ng ch\u1eef \u0111\u00e3 bi\u1ebft.<\/p>\r\n\r\n\r\n\r\n
<\/span>Tr\u00edch xu\u1ea5t \u0111\u1eb7c \u0111i\u1ec3m<\/strong><\/span><\/h4>\r\n\r\n\r\n\r\nNh\u1eadn d\u1ea1ng v\u0103n b\u1ea3n b\u1eb1ng tr\u00edch xu\u1ea5t \u0111\u1eb7c \u0111i\u1ec3m ngh\u0129a l\u00e0 chia nh\u1ecf ho\u1eb7c ph\u00e2n t\u00e1ch h\u00ecnh d\u1ea1ng ch\u1eef th\u00e0nh c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m v\u00ed d\u1ee5 nh\u01b0 n\u00e9t th\u1eb3ng, n\u00e9t v\u00f2ng kh\u00e9p k\u00edn, h\u01b0\u1edbng n\u00e9t v\u00e0 giao \u0111i\u1ec3m n\u00e9t. T\u1eeb \u0111\u00f3, h\u1ec7 th\u1ed1ng OCR s\u1ebd s\u1eed d\u1ee5ng c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m n\u00e0y \u0111\u1ec3 t\u00ecm k\u1ebft qu\u1ea3 g\u1ea7n \u0111\u00fang nh\u1ea5t ho\u1eb7c ph\u00f9 h\u1ee3p nh\u1ea5t trong s\u1ed1 c\u00e1c h\u00ecnh d\u1ea1ng ch\u1eef kh\u00e1c nhau \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef.<\/p>\r\n\r\n\r\n\r\n
<\/span>H\u1eadu x\u1eed l\u00fd<\/strong><\/span><\/h3>\r\n\r\n\r\n\r\nSau qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch, ph\u1ea7n m\u1ec1m s\u1ebd chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u v\u0103n b\u1ea3n \u0111\u00e3 tr\u00edch xu\u1ea5t th\u00e0nh t\u1ec7p tr\u00ean m\u00e1y t\u00ednh. M\u1ed9t s\u1ed1 h\u1ec7 th\u1ed1ng OCR c\u00f3 th\u1ec3 t\u1ea1o c\u00e1c t\u1ec7p PDF bao g\u1ed3m c\u1ea3 phi\u00ean b\u1ea3n tr\u01b0\u1edbc v\u00e0 sau c\u1ee7a t\u00e0i li\u1ec7u \u0111\u01b0\u1ee3c qu\u00e9t.<\/p>\r\n\r\n\r\n\r\n
<\/span>OCR c\u00f3 nh\u1eefng lo\u1ea1i n\u00e0o?<\/strong><\/span><\/h2>\r\n\r\n\r\n\r\nNh\u1eefng c\u00f4ng ngh\u1ec7 OCR kh\u00e1c nhau \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 khoa h\u1ecdc d\u1eef li\u1ec7u ph\u00e2n lo\u1ea1i d\u1ef1a tr\u00ean m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang.<\/p>\r\n\r\n\r\n
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![\"C\u00f4ng](\"https:\/\/vtcnetviet.com\/wp-content\/uploads\/2023\/03\/OCR-la-gi-4.jpg\" "\\"C\u00f4ng")
<\/figure><\/div>\r\n\r\n\r\nC\u00f4ng ngh\u1ec7 OCR \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i d\u1ef1a tr\u00ean m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng<\/em><\/p>\r\n\r\n\r\n\r\n<\/span>Ph\u1ea7n m\u1ec1m nh\u1eadn d\u1ea1ng k\u00fd t\u1ef1 quang h\u1ecdc \u0111\u01a1n gi\u1ea3n<\/strong><\/span><\/h3>\r\n\r\n\r\n\r\nNhi\u1ec1u h\u00ecnh \u1ea3nh v\u0103n b\u1ea3n v\u00e0 ph\u00f4ng ch\u1eef kh\u00e1c nhau d\u01b0\u1edbi d\u1ea1ng m\u1eabu \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong m\u1ed9t c\u00f4ng c\u1ee5 OCR \u0111\u01a1n gi\u1ea3n. Ph\u1ea7n m\u1ec1m OCR so s\u00e1nh c\u00e1c h\u00ecnh \u1ea3nh v\u0103n b\u1ea3n, theo t\u1eebng k\u00fd t\u1ef1 m\u1ed9t, v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u n\u1ed9i b\u1ed9 b\u1eb1ng thu\u1eadt to\u00e1n so kh\u1edbp m\u1eabu. Tr\u01b0\u1eddng h\u1ee3p so kh\u1edbp v\u0103n b\u1ea3n theo t\u1eebng t\u1eeb m\u1ed9t \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 nh\u1eadn d\u1ea1ng t\u1eeb quang h\u1ecdc. Gi\u1ea3i ph\u00e1p n\u00e0y h\u1ea1n ch\u1ebf v\u00ec s\u1ed1 l\u01b0\u1ee3ng ph\u00f4ng ch\u1eef v\u00e0 ki\u1ec3u ch\u1eef vi\u1ebft tay g\u1ea7n nh\u01b0 v\u00f4 h\u1ea1n, kh\u00f4ng th\u1ec3 ghi l\u1ea1i hay l\u01b0u tr\u1eef t\u1ea5t c\u1ea3 c\u00e1c ki\u1ec3u lo\u1ea1i trong c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/p>\r\n\r\n\r\n\r\n
<\/span>Ph\u1ea7n m\u1ec1m nh\u1eadn d\u1ea1ng k\u00fd t\u1ef1 th\u00f4ng minh<\/strong><\/span><\/h3>\r\n\r\n\r\n\r\nC\u00e1c ph\u1ea7n m\u1ec1m OCR hi\u1ec7n \u0111\u1ea1i s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 nh\u1eadn d\u1ea1ng k\u00fd t\u1ef1 th\u00f4ng minh (ICR) \u0111\u1ec3 \u0111\u1ecdc v\u0103n b\u1ea3n gi\u1ed1ng nh\u01b0 c\u00e1ch con ng\u01b0\u1eddi \u0111\u1ecdc. Nh\u1eefng h\u1ec7 th\u1ed1ng n\u00e0y s\u1eed d\u1ee5ng nhi\u1ec1u ph\u01b0\u01a1ng th\u1ee9c n\u00e2ng cao \u0111\u1ec3 \u0111\u00e0o t\u1ea1o m\u00e1y h\u1ecdc (machine learning). H\u1ec7 th\u1ed1ng m\u00e1y h\u1ecdc \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ea1ng n\u01a1-ron ph\u00e2n t\u00edch v\u0103n b\u1ea3n qua nhi\u1ec1u c\u1ea5p \u0111\u1ed9, x\u1eed l\u00fd h\u00ecnh \u1ea3nh l\u1eb7p \u0111i l\u1eb7p l\u1ea1i. Nhi\u1ec7m v\u1ee5 c\u1ee7a ch\u00fang l\u00e0 t\u00ecm ki\u1ebfm c\u00e1c thu\u1ed9c t\u00ednh h\u00ecnh \u1ea3nh kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 n\u00e9t cong, n\u00e9t th\u1eb3ng, n\u00e9t giao nhau v\u00e0 n\u00e9t v\u00f2ng, sau \u0111\u00f3 k\u1ebft h\u1ee3p k\u1ebft qu\u1ea3 c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c c\u1ea5p \u0111\u1ed9 ph\u00e2n t\u00edch kh\u00e1c nhau n\u00e0y \u0111\u1ec3 cho ra k\u1ebft qu\u1ea3 cu\u1ed1i c\u00f9ng. D\u00f9 ICR th\u01b0\u1eddng x\u1eed l\u00fd h\u00ecnh \u1ea3nh theo t\u1eebng k\u00fd t\u1ef1 nh\u01b0ng qu\u00e1 tr\u00ecnh n\u00e0y v\u1eabn di\u1ec5n ra nhanh ch\u00f3ng v\u00e0 k\u1ebft qu\u1ea3 thu \u0111\u01b0\u1ee3c ch\u1ec9 trong v\u00e0i gi\u00e2y.<\/p>\r\n\r\n\r\n\r\n