B\u1ea1n mu\u1ed1n tr\u00edch xu\u1ea5t v\u0103n b\u1ea3n t\u1eeb m\u1ed9t t\u1eadp tin \u1ea3nh hay t\u00e0i li\u1ec7u? Th\u00f4ng th\u01b0\u1eddng, ph\u1ea7n m\u1ec1m OCR (Optical Character Recognition \u2013 Nh\u1eadn d\u1ea1ng k\u00fd t\u1ef1 quang h\u1ecdc) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 sao ch\u00e9p v\u0103n b\u1ea3n t\u1eeb h\u00ecnh \u1ea3nh scan v\u00e0 r\u1ea5t h\u1eefu \u00edch, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i s\u00e1ch v\u00e0 t\u00e0i li\u1ec7u sang \u0111\u1ecbnh d\u1ea1ng k\u1ef9 thu\u1eadt s\u1ed1.<\/p>\n\n\n\n
Tuy nhi\u00ean, \u0111a s\u1ed1 ch\u00fang ch\u00fang l\u00e0 nh\u1eefng ph\u1ea7n m\u1ec1m th\u01b0\u01a1ng m\u1ea1i, b\u1ea1n ph\u1ea3i tr\u1ea3 ph\u00ed \u0111\u1ec3 s\u1eed d\u1ee5ng m\u00e0 l\u1ea1i n\u1eb7ng n\u1ec1 v\u00e0 \u00f4m \u0111\u1ed3m nhi\u1ec1u ch\u1ee9c n\u0103ng kh\u00f4ng c\u1ea7n thi\u1ebft n\u1eefa. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ed1n c\u00e1ch \u0111\u01a1n gi\u1ea3n \u0111\u1ec3 tr\u00edch xu\u1ea5t v\u0103n b\u1ea3n t\u1eeb c\u00e1c t\u1eadp tin h\u00ecnh \u1ea3nh, \u0111\u1eb7c bi\u1ec7t ho\u00e0n to\u00e0n mi\u1ec5n ph\u00ed.<\/p>\n\n\n\n
S\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m m\u00e3 ngu\u1ed3n m\u1edf:<\/p>\n\n\n\n
Ch\u00fang ta c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng 2 ph\u1ea7n m\u1ec1m sau \u0111\u00e2y \u0111\u1ec3 tr\u00edch xu\u1ea5t v\u0103n b\u1ea3n t\u1eeb h\u00ecnh \u1ea3nh:<\/p>\n\n\n\n
– Ph\u1ea7n m\u1ec1m Gttext: \u0110\u00e2y l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u00e3 ngu\u1ed3n m\u1edf mi\u1ec5n ph\u00ed cho Windows (32bit v\u00e0 64bit) c\u00f3 th\u1ec3 sao ch\u00e9p v\u0103n b\u1ea3n t\u1eeb c\u00e1c t\u1eadp tin h\u00ecnh \u1ea3nh ph\u1ed5 bi\u1ebfn (JPEG, PNG, BMP, GIF, TIFF) g\u1ea7n nh\u01b0 ch\u00ednh x\u00e1c v\u00e0 v\u0103n b\u1ea3n \u0111\u01b0\u1ee3c sao ch\u00e9p v\u00e0o clipboard \u0111\u1ec3 b\u1ea1n d\u00e1n ch\u00fang tr\u00ean b\u1ea5t k\u1ef3 tr\u00ecnh so\u1ea1n th\u1ea3o v\u0103n b\u1ea3n.<\/p>\n\n\n\n
\u0110\u1ec3 s\u1eed d\u1ee5ng Gttext, tr\u01b0\u1edbc ti\u00ean t\u1ea3i ph\u1ea7n m\u1ec1m v\u1ec1 t\u1ea1i \u0111\u1ecba ch\u1ec9 http:\/\/code.google.com\/p\/gttext\/downloads\/list<\/a> v\u00e0 c\u00e0i \u0111\u1eb7t n\u00f3. Sau \u0111\u00f3 ch\u1ea1y Gttext v\u00e0 m\u1edf m\u1ed9t t\u1eadp tin \u1ea3nh c\u00f3 v\u0103n b\u1ea3n mu\u1ed1n tr\u00edch xu\u1ea5t b\u1eb1ng c\u00e1ch nh\u1ea5p v\u00e0o t\u00f9y ch\u1ecdn Copy image text t\u1eeb tr\u00ecnh \u0111\u01a1n Tools. M\u1ed9t c\u1eeda s\u1ed5 pop-up m\u1edf ra, b\u00ean trong hi\u1ec3n th\u1ecb v\u0103n b\u1ea3n \u0111\u01b0\u1ee3c tr\u00edch xu\u1ea5t t\u1eeb h\u00ecnh \u1ea3nh. N\u1ebfu b\u1ea1n h\u00e0i l\u00f2ng, nh\u1ea5p v\u00e0o n\u00fat Continue \u0111\u1ec3 sao ch\u00e9p v\u0103n b\u1ea3n v\u00e0o clipboard. N\u1ebfu b\u1ea1n kh\u00f4ng h\u00e0i l\u00f2ng, nh\u1ea5n n\u00fat Try Again.<\/p>\n\n\n\n – Ph\u1ea7n m\u1ec1m VietOCR: \u0110\u00e2y l\u00e0 m\u1ed9t ti\u1ec7n \u00edch \u201cthu\u1ea7n Vi\u1ec7t\u201d c\u00f3 th\u1ec3 nh\u1eadn d\u1ea1ng v\u00e0 tr\u00edch xu\u1ea5t ch\u00ednh x\u00e1c \u0111\u1ebfn 80%. Ch\u01b0\u01a1ng tr\u00ecnh h\u1ed7 tr\u1ee3 2 ng\u00f4n ng\u1eef tr\u00edch xu\u1ea5t ch\u00ednh l\u00e0 ti\u1ebfng Anh v\u00e0 ti\u1ebfng Vi\u1ec7t nh\u01b0ng \u0111\u1ec3 s\u1eed d\u1ee5ng b\u1ea1n ph\u1ea3i c\u00e0i \u0111\u1eb7t th\u00eam Java Runtime Environment 6.0 ho\u1eb7c m\u1edbi h\u01a1n v\u00e0 Microsoft Visual C++ 2008 SP1.<\/p>\n\n\n\n Tr\u00ean giao di\u1ec7n ch\u01b0\u01a1ng tr\u00ecnh, b\u1ea1n m\u1edf menu File > Open > ch\u1ecdn All Image Files trong ph\u1ea7n File of types \u0111\u1ec3 l\u1ea5y file \u1ea3nh > Open. Ph\u1ea7n n\u1ed9i dung c\u1ee7a file \u1ea3nh s\u1ebd xu\u1ea5t hi\u1ec7n b\u00ean khung tr\u00e1i, b\u00e2y gi\u1edd b\u1ea1n nh\u1ea5n v\u00e0o m\u1ee5c OCR Language (g\u00f3c tr\u00ean b\u00ean ph\u1ea3i c\u1eeda s\u1ed5) \u0111\u1ec3 ch\u1ecdn ng\u00f4n ng\u1eef trong file \u1ea3nh nu\u1ed1n tr\u00edch xu\u1ea5t > nh\u1ea5n n\u00fat OCR. Th\u1eddi gian tr\u00edch xu\u1ea5t nhanh hay ch\u1eadm ph\u1ee5 thu\u1ed9c v\u00e0o s\u1ed1 l\u01b0\u1ee3ng k\u00fd t\u1ef1 trong file v\u00e0 t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd c\u1ee7a m\u00e1y t\u00ednh. N\u1ebfu ho\u00e0n th\u00e0nh, n\u1ed9i dung tr\u00edch xu\u1ea5t s\u1ebd hi\u1ec7n ra tron khung b\u00ean ph\u1ea3i v\u00e0 b\u1ea1n c\u00f3 th\u1ec3 sao ch\u00e9p ra v\u00e0 s\u1eed d\u1ee5ng.<\/p>\n\n\n\n T\u1ea3i VietOCR 3.1.5<\/a> t\u1ea1i trang ch\u1ee7. B\u1ea1n c\u00f3 th\u1ec3 xem video h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng t\u1ea1i \u0111\u1ecba ch\u1ec9 http:\/\/www.youtube.com\/watch?v=g9zezEWlds0<\/a>.<\/p>\n\n\n\n 2. S\u1eed d\u1ee5ng Microsoft OneNote<\/strong>:<\/p>\n\n\n\n M\u1ed9t trong nh\u1eefng gi\u1ea3i ph\u00e1p d\u1ec5 nh\u1ea5t v\u00e0 \u0111\u01a1n gi\u1ea3n \u0111\u1ec3 tr\u00edch xu\u1ea5t v\u0103n b\u1ea3n t\u1eeb t\u1eadp tin h\u00ecnh \u1ea3nh l\u00e0 s\u1eed d\u1ee5ng ch\u01b0\u01a1ng tr\u00ecnh Microsoft OneNote. \u0110\u00e2y l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng ghi ch\u00fa v\u00e0 l\u1eadp k\u1ebf ho\u1ea1ch tuy\u1ec7t v\u1eddi v\u00e0 th\u01b0\u1eddng \u0111i k\u00e8m v\u1edbi Microsoft Office.<\/p>\n\n\n\n \u0110\u1ec3 tr\u00edch xu\u1ea5t v\u0103n b\u1ea3n t\u1eeb h\u00ecnh \u1ea3nh b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng OneNote, \u0111\u1ea7u ti\u00ean b\u1ea1n ch\u1ea1y ch\u01b0\u01a1ng tr\u00ecnh r\u1ed3i k\u00e9o v\u00e0 th\u1ea3 m\u1ed9t t\u1eadp tin h\u00ecnh \u1ea3nh v\u00e0o ch\u01b0\u01a1ng tr\u00ecnh, nh\u1ea5p chu\u1ed9t ph\u1ea3i v\u00e0o h\u00ecnh \u1ea3nh v\u00e0 ch\u1ecdn Copy Text from Image. V\u0103n b\u1ea3n khi tr\u00edch xu\u1ea5t xong s\u1ebd l\u01b0u v\u00e0o clipboard v\u00e0 b\u1ea1n c\u00f3 th\u1ec3 d\u00e1n n\u00f3 v\u00e0o b\u1ea5t k\u1ef3 tr\u00ecnh so\u1ea1n th\u1ea3o t\u00e0i li\u1ec7u hay ch\u00ednh trong OneNote. K\u1ebft qu\u1ea3 c\u1ee7a qu\u00e1 tr\u00ecnh tr\u00edch xu\u1ea5t v\u0103n b\u1ea3n t\u1eeb OneNote l\u00e0 g\u1ea7n nh\u01b0 ch\u00ednh x\u00e1c.<\/p>\n\n\n\n 3. S\u1eed d\u1ee5ng Google Docs<\/strong>:<\/p>\n\n\n\n B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 Google Docs c\u1ee7a Google \u0111\u1ec3 tr\u00edch xu\u1ea5t v\u0103n b\u1ea3n t\u1eeb t\u00e0i li\u1ec7u ho\u1eb7c t\u1eadp tin h\u00ecnh \u1ea3nh. \u0110\u1ec3 s\u1eed d\u1ee5ng, truy c\u1eadp v\u00e0o http:\/\/docs.google.com<\/a> v\u00e0 \u0111\u0103ng nh\u1eadp v\u1edbi t\u00e0i kho\u1ea3n Google c\u1ee7a b\u1ea1n. B\u00e2y gi\u1edd, b\u1ea5m v\u00e0o n\u00fat Upload v\u00e0 ch\u1ecdn m\u1ed9t h\u00ecnh \u1ea3nh ho\u1eb7c t\u1eadp tin PDF \u0111\u1ec3 t\u1ea3i l\u00ean, \u0111\u00e1nh d\u1ea5u ki\u1ec3m tr\u01b0\u1edbc t\u00f9y ch\u1ecdn Convert text from PDF or image files to Google Docs documents v\u00e0 sau \u0111\u00f3 nh\u1ea5p v\u00e0o n\u00fat Start Upload.<\/p>\n\n\n\n Sau khi ho\u00e0n th\u00e0nh qu\u00e1 tr\u00ecnh t\u1ea3i l\u00ean, nh\u1ea5p v\u00e0o t\u1eadp tin t\u1ea3i l\u00ean. N\u00f3 s\u1ebd m\u1edf t\u1eadp tin v\u0103n b\u1ea3n c\u00f3 n\u1ed9i dung \u0111\u01b0\u1ee3c chi\u1ebft xu\u1ea5t s\u1ebd hi\u1ec3n th\u1ecb trong tr\u00ecnh so\u1ea1n th\u1ea3o Google Doc. B\u1ea1n c\u00f3 th\u1ec3 l\u01b0u ho\u1eb7c ch\u1ec9nh s\u1eeda c\u00e1c v\u0103n b\u1ea3n.<\/p>\n\n\n\n 4. S\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 tr\u00edch xu\u1ea5t chuy\u00ean d\u1ee5ng<\/strong>:<\/p>\n\n\n\n C\u00f3 m\u1ed9t s\u1ed1 d\u1ecbch v\u1ee5 tr\u1ef1c tuy\u1ebfn mi\u1ec5n ph\u00ed c\u00f3 kh\u1ea3 n\u0103ng tr\u00edch xu\u1ea5t v\u0103n b\u1ea3n t\u1eeb c\u00e1c t\u1eadp tin h\u00ecnh \u1ea3nh, ch\u1eb3ng h\u1ea1n nh\u01b0:<\/p>\n\n\n\n – OCRconvert.com<\/a>: \u0110\u00e2y l\u00e0 m\u1ed9t d\u1ecbch v\u1ee5 nh\u1eadn d\u1ea1ng k\u00fd t\u1ef1 quang h\u1ecdc (OCR) mi\u1ec5n ph\u00ed cho ph\u00e9p b\u1ea1n tr\u00edch xu\u1ea5t v\u0103n b\u1ea3n t\u1eeb PDF, v\u00e0 c\u00e1c t\u1eadp tin h\u00ecnh \u1ea3nh.\u00a0 \u0110\u1ec3 s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5, b\u1ea1n ch\u1ec9 c\u1ea7n t\u1ea3i l\u00ean t\u1eadp tin c\u1ee7a b\u1ea1n, v\u00e0 ch\u1ecdn ng\u00f4n ng\u1eef c\u1ee7a v\u0103n b\u1ea3n trong \u1ea3nh hay t\u00e0i li\u1ec7u mu\u1ed1n tr\u00edch xu\u1ea5t. Ti\u1ebfp theo, b\u1ea1n ch\u1ecdn \u0111\u1ecbnh d\u1ea1ng t\u00e0i li\u1ec7u m\u00e0 ch\u01b0\u01a1ng tr\u00ecnh s\u1ebd s\u1eed d\u1ee5ng \u0111\u1ec3 l\u01b0u v\u0103n b\u1ea3n tr\u00edch xu\u1ea5t > cu\u1ed1i c\u00f9ng nh\u1ea5n n\u00fat Process. Sau khi ho\u00e0n t\u1ea5t, b\u1ea1n c\u00f3 th\u1ec3 t\u1ea3i v\u1ec1 c\u00e1c v\u0103n b\u1ea3n tr\u00edch xu\u1ea5t ho\u1eb7c ch\u1ec9nh s\u1eeda ch\u00fang tr\u1ef1c ti\u1ebfp.<\/p>\n\n\n\n