{"id":46057,"date":"2025-09-11T03:54:40","date_gmt":"2025-09-11T03:54:40","guid":{"rendered":"https:\/\/staging.pageloot.com\/uncategorized\/how-qr-code-size-impacts-visibility\/"},"modified":"2026-04-22T13:14:07","modified_gmt":"2026-04-22T13:14:07","slug":"how-qr-code-size-impacts-visibility","status":"publish","type":"post","link":"https:\/\/pageloot.com\/vi\/blog\/how-qr-code-size-impacts-visibility\/","title":{"rendered":"K\u00edch th\u01b0\u1edbc m\u00e3 QR \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng qu\u00e9t v\u00e0 kh\u1ea3 n\u0103ng hi\u1ec3n th\u1ecb nh\u01b0 th\u1ebf n\u00e0o"},"content":{"rendered":"

B\u1ea1n \u0111\u00e3 bao gi\u1edd in m\u00e3 QR m\u00e0 sau \u0111\u00f3 ph\u00e1t hi\u1ec7n ra n\u00f3 kh\u00f4ng th\u1ec3 qu\u00e9t \u0111\u01b0\u1ee3c tr\u00ean \u0111i\u1ec7n tho\u1ea1i c\u1ee7a kh\u00e1ch h\u00e0ng ch\u01b0a? Sai s\u00f3t n\u00e0y d\u1eabn \u0111\u1ebfn l\u00e3ng ph\u00ed chi ph\u00ed in \u1ea5n v\u00e0 b\u1ecf l\u1ee1 c\u01a1 h\u1ed9i t\u01b0\u01a1ng t\u00e1c. H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u1ea3i th\u00edch c\u00e1ch t\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc ph\u00f9 h\u1ee3p \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u00e3 QR c\u1ee7a b\u1ea1n v\u1eabn c\u00f3 th\u1ec3 qu\u00e9t \u0111\u01b0\u1ee3c \u1edf m\u1ecdi kho\u1ea3ng c\u00e1ch ho\u1eb7c ch\u1ea5t li\u1ec7u.<\/p>\n\n\n\n

Khoa h\u1ecdc v\u1ec1 c\u00e1c m\u00f4-\u0111un m\u00e3 QR v\u00e0 kh\u1ea3 n\u0103ng \u0111\u1ecdc<\/h2>\n\n\n\n

M\u00e3 QR l\u00e0 m\u1ed9t l\u01b0\u1edbi ph\u1ee9c t\u1ea1p g\u1ed3m c\u00e1c \u00f4 vu\u00f4ng ri\u00eang l\u1ebb \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u00f4-\u0111un. \u0110\u1ec3 camera \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh gi\u1ea3i m\u00e3 th\u00f4ng tin th\u00e0nh c\u00f4ng, c\u1ea3m bi\u1ebfn c\u1ee7a n\u00f3 ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng ph\u00e2n bi\u1ec7t r\u00f5 r\u00e0ng t\u1eebng m\u00f4-\u0111un. N\u1ebfu m\u00e3 \u0111\u01b0\u1ee3c in qu\u00e1 nh\u1ecf, c\u00e1c m\u00f4-\u0111un n\u00e0y s\u1ebd b\u1ecb m\u1edd \u0111i, t\u1ea1o ra m\u1ed9t \u201ckh\u1ed1i\u201d m\u00e0 m\u00e1y qu\u00e9t kh\u00f4ng th\u1ec3 gi\u1ea3i th\u00edch. Y\u00eau c\u1ea7u c\u01a1 b\u1ea3n n\u00e0y l\u00e0 l\u00fd do t\u1ea1i sao c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t \u0111\u1ec3 \u0111\u1ecdc m\u00e3 QR<\/a> t\u1eadp trung r\u1ea5t nhi\u1ec1u v\u00e0o \u0111\u1ed9 r\u00f5 n\u00e9t v\u1eadt l\u00fd.<\/p>\n\n\n\n

C\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng nh\u01b0 \u00e1nh s\u00e1ng y\u1ebfu ho\u1eb7c tay run c\u00e0ng l\u00e0m ph\u1ee9c t\u1ea1p th\u00eam qu\u00e1 tr\u00ecnh n\u00e0y. M\u1ed9t m\u00e3 c\u00f3 th\u1ec3 qu\u00e9t d\u1ec5 d\u00e0ng trong v\u0103n ph\u00f2ng s\u00e1ng s\u1ee7a c\u00f3 th\u1ec3 kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng trong nh\u00e0 h\u00e0ng thi\u1ebfu s\u00e1ng ho\u1eb7c tr\u00ean xe bu\u00fdt \u0111ang di chuy\u1ec3n. B\u1eb1ng c\u00e1ch t\u1ed1i \u01b0u h\u00f3a k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd c\u1ee7a m\u00e3 trong giai \u0111o\u1ea1n thi\u1ebft k\u1ebf, b\u1ea1n cung c\u1ea5p m\u1ed9t \u201cv\u00f9ng \u0111\u1ec7m\u201d cho ph\u00e9p m\u00e1y qu\u00e9t ho\u1ea1t \u0111\u1ed9ng ngay c\u1ea3 trong \u0111i\u1ec1u ki\u1ec7n kh\u00f4ng l\u00fd t\u01b0\u1edfng.<\/p>\n\n\n\n

T\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc v\u1edbi quy t\u1eafc qu\u00e9t 10:1<\/h2>\n\n\n\n

C\u00e1ch \u0111\u00e1ng tin c\u1eady nh\u1ea5t \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc m\u00e3 QR c\u1ee7a b\u1ea1n l\u00e0 \u00e1p d\u1ee5ng t\u1ef7 l\u1ec7 qu\u00e9t 10:1. C\u00f4ng th\u1ee9c n\u00e0y g\u1ee3i \u00fd r\u1eb1ng k\u00edch th\u01b0\u1edbc c\u1ee7a m\u00e3 QR ph\u1ea3i x\u1ea5p x\u1ec9 m\u1ed9t ph\u1ea7n m\u01b0\u1eddi kho\u1ea3ng c\u00e1ch m\u00e0 ng\u01b0\u1eddi d\u00f9ng s\u1ebd qu\u00e9t n\u00f3. V\u00ed d\u1ee5, n\u1ebfu b\u1ea1n mong \u0111\u1ee3i kh\u00e1ch h\u00e0ng qu\u00e9t m\u00e3 t\u1eeb kho\u1ea3ng c\u00e1ch 1 m\u00e9t (kho\u1ea3ng 3 feet), b\u1ea3n th\u00e2n m\u00e3 \u0111\u00f3 ph\u1ea3i r\u1ed9ng \u00edt nh\u1ea5t 10 cm (kho\u1ea3ng 4 inch).<\/p>\n\n\n\n

Vi\u1ec7c tu\u00e2n th\u1ee7 \u0111i\u1ec1u n\u00e0y h\u01b0\u1edbng d\u1eabn k\u00edch th\u01b0\u1edbc m\u00e3 QR c\u1ee7a ch\u00fang t\u00f4i<\/a> ng\u0103n ch\u1eb7n l\u1ed7i ph\u1ed5 bi\u1ebfn l\u00e0 in m\u00e3 qu\u00e1 nh\u1ecf tr\u00ean c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n th\u00f4ng kh\u1ed5 l\u1edbn. \u1ede kho\u1ea3ng c\u00e1ch 10 feet, m\u1ed9t m\u00e3 c\u1ea7n r\u1ed9ng \u00edt nh\u1ea5t 12 inch \u0111\u1ec3 v\u1eabn d\u1ec5 \u0111\u1ecdc \u0111\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c camera \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh. \u0110\u1ed1i v\u1edbi c\u00e1c m\u00e0n h\u00ecnh l\u1edbn nh\u01b0 bi\u1ec3n qu\u1ea3ng c\u00e1o \u0111\u01b0\u1ee3c xem t\u1eeb kho\u1ea3ng c\u00e1ch 50 feet, k\u00edch th\u01b0\u1edbc c\u00f3 th\u1ec3 c\u1ea7n \u0111\u1ea1t 5 feet tr\u1edf l\u00ean \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c m\u00f4-\u0111un \u0111\u1ee7 l\u1edbn \u0111\u1ec3 \u1ed1ng k\u00ednh m\u00e1y \u1ea3nh l\u1ea5y n\u00e9t ch\u00ednh x\u00e1c.<\/p>\n\n\n\n

\"\u0110\u1ed3<\/figure>\n\n\n\n

K\u00edch th\u01b0\u1edbc \u0111\u1ec1 xu\u1ea5t cho c\u00e1c \u0111\u1ecbnh d\u1ea1ng in ph\u1ed5 bi\u1ebfn<\/h2>\n\n\n\n

M\u1eb7c d\u00f9 quy t\u1eafc 10:1 cung c\u1ea5p m\u1ed9t c\u01a1 s\u1edf k\u1ef9 thu\u1eadt, nh\u01b0ng c\u00e1c t\u00e0i li\u1ec7u ti\u1ebfp th\u1ecb ti\u00eau chu\u1ea9n th\u01b0\u1eddng c\u00f3 kho\u1ea3ng c\u00e1ch xem c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c. Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u00fang k\u00edch th\u01b0\u1edbc m\u00e3 QR cho c\u00e1c v\u1eadt li\u1ec7u in kh\u00e1c nhau<\/a> li\u00ean quan \u0111\u1ebfn vi\u1ec7c c\u00e2n b\u1eb1ng kh\u00f4ng gian thi\u1ebft k\u1ebf c\u00f3 s\u1eb5n v\u1edbi c\u00e1c y\u00eau c\u1ea7u ch\u1ee9c n\u0103ng n\u00e0y.<\/p>\n\n\n\n

\n\n\n\n\n\n\n\n\n\n
\u0110\u1ecbnh d\u1ea1ng in<\/th>\nKho\u1ea3ng c\u00e1ch xem \u0111i\u1ec3n h\u00ecnh<\/th>\nK\u00edch th\u01b0\u1edbc t\u1ed1i thi\u1ec3u \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t<\/th>\n<\/tr>\n<\/thead>\n
Danh thi\u1ebfp<\/strong><\/td>\n6\u201312 inch<\/td>\n0.8 x 0.8 inch (2 x 2 cm)<\/td>\n<\/tr>\n
Bao b\u00ec s\u1ea3n ph\u1ea9m<\/strong><\/td>\n1\u20132 feet<\/td>\n1 x 1 in (2.5 x 2.5 cm)<\/td>\n<\/tr>\n
T\u1edd r\u01a1i & T\u00e0i li\u1ec7u qu\u1ea3ng c\u00e1o<\/strong><\/td>\n2\u20133 feet<\/td>\n1.2 x 1.2 in (3 x 3 cm)<\/td>\n<\/tr>\n
\u00c1p ph\u00edch (A3\/A2)<\/strong><\/td>\n3\u20135 feet<\/td>\n2 x 2 in (5 x 5 cm)<\/td>\n<\/tr>\n
Bi\u1ec3u ng\u1eef & B\u1ea3ng hi\u1ec7u<\/strong><\/td>\n10+ feet<\/td>\n10 x 10 in (25 x 25 cm)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n\n\n\n

Khi b\u1ea1n thi\u1ebft k\u1ebf m\u00e3 QR tr\u00ean bao b\u00ec s\u1ea3n ph\u1ea9m<\/a>, b\u1ea1n c\u0169ng ph\u1ea3i t\u00ednh \u0111\u1ebfn k\u1ebft c\u1ea5u b\u1ec1 m\u1eb7t. C\u00e1c v\u1eadt li\u1ec7u nh\u01b0 b\u00eca c\u1ee9ng s\u00f3ng ho\u1eb7c v\u1ea3i c\u00f3 k\u1ebft c\u1ea5u c\u00f3 th\u1ec3 l\u00e0m bi\u1ebfn d\u1ea1ng c\u00e1c m\u00f4-\u0111un ho\u1eb7c t\u1ea1o ra b\u00f3ng l\u00e0m c\u1ea3n tr\u1edf qu\u00e1 tr\u00ecnh qu\u00e9t. Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0y, th\u01b0\u1eddng c\u1ea7n t\u0103ng k\u00edch th\u01b0\u1edbc m\u00e3 l\u00ean 25% \u0111\u1ebfn 50% \u0111\u1ec3 b\u00f9 \u0111\u1eafp cho n\u1ec1n kh\u00f4ng \u0111\u1ec1u.<\/p>\n\n\n\n

\"V\u00ed<\/figure>\n\n\n\n

M\u1eadt \u0111\u1ed9 d\u1eef li\u1ec7u \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n\n\n\n

M\u1eadt \u0111\u1ed9 c\u1ee7a m\u00e3 QR \u0111\u1ec1 c\u1eadp \u0111\u1ebfn s\u1ed1 l\u01b0\u1ee3ng m\u00f4-\u0111un \u0111\u01b0\u1ee3c \u0111\u00f3ng g\u00f3i v\u00e0o l\u01b0\u1edbi. M\u1ed9t m\u00e3 ch\u1ee9a URL d\u00e0i, ph\u1ee9c t\u1ea1p v\u1edbi c\u00e1c tham s\u1ed1 theo d\u00f5i s\u1ebd c\u00f3 m\u1ed9t m\u1eabu d\u00e0y \u0111\u1eb7c h\u01a1n nhi\u1ec1u so v\u1edbi m\u1ed9t m\u00e3 \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi m\u1ed9t \u0111\u1ecba ch\u1ec9 trang web ng\u1eafn. Khi m\u1eabu tr\u1edf n\u00ean d\u00e0y \u0111\u1eb7c h\u01a1n, c\u00e1c m\u00f4-\u0111un ri\u00eang l\u1ebb tr\u1edf n\u00ean nh\u1ecf h\u01a1n, khi\u1ebfn m\u00e3 kh\u00f3 qu\u00e9t h\u01a1n \u0111\u00e1ng k\u1ec3 n\u1ebfu k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd t\u1ed5ng th\u1ec3 kh\u00f4ng \u0111\u01b0\u1ee3c t\u0103ng l\u00ean.<\/p>\n\n\n\n

\u0110\u1ec3 duy tr\u00ec k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd nh\u1ecf tr\u00ean c\u00e1c v\u1eadt ph\u1ea9m nh\u01b0 thi\u1ebft k\u1ebf danh thi\u1ebfp<\/a>, b\u1ea1n n\u00ean gi\u1ea3m thi\u1ec3u d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong m\u00e3. S\u1eed d\u1ee5ng m\u00e3 QR \u0111\u1ed9ng<\/a> l\u00e0 gi\u1ea3i ph\u00e1p hi\u1ec7u qu\u1ea3 nh\u1ea5t cho v\u1ea5n \u0111\u1ec1 n\u00e0y. B\u1edfi v\u00ec m\u00e3 \u0111\u1ed9ng s\u1eed d\u1ee5ng URL chuy\u1ec3n h\u01b0\u1edbng ng\u1eafn, m\u1eabu m\u00f4-\u0111un v\u1eabn \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 qu\u00e9t b\u1ea5t k\u1ec3 c\u00f3 bao nhi\u00eau th\u00f4ng tin cu\u1ed1i c\u00f9ng \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn ng\u01b0\u1eddi d\u00f9ng.<\/p>\n\n\n\n

Y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt: V\u00f9ng y\u00ean t\u0129nh v\u00e0 \u0110\u1ed9 t\u01b0\u01a1ng ph\u1ea3n<\/h2>\n\n\n\n

Ngo\u00e0i chi\u1ec1u cao v\u00e0 chi\u1ec1u r\u1ed9ng c\u1ee7a m\u00e3, hai y\u1ebfu t\u1ed1 k\u1ef9 thu\u1eadt \u2013 \u201cV\u00f9ng y\u00ean t\u0129nh\u201d v\u00e0 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n m\u00e0u s\u1eafc \u2013 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi kh\u1ea3 n\u0103ng hi\u1ec3n th\u1ecb. V\u00f9ng y\u00ean t\u0129nh l\u00e0 \u0111\u01b0\u1eddng vi\u1ec1n tr\u1eafng b\u1eaft bu\u1ed9c bao quanh m\u00e3 QR. Theo ti\u00eau chu\u1ea9n ISO\/IEC 18004, \u0111\u01b0\u1eddng vi\u1ec1n n\u00e0y ph\u1ea3i r\u1ed9ng \u00edt nh\u1ea5t b\u1ed1n m\u00f4-\u0111un \u1edf t\u1ea5t c\u1ea3 c\u00e1c c\u1ea1nh. Kho\u1ea3ng tr\u1ed1ng r\u00f5 r\u00e0ng n\u00e0y ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t v\u00f9ng \u0111\u1ec7m b\u1ea3o v\u1ec7, b\u00e1o hi\u1ec7u cho m\u00e1y qu\u00e9t ch\u00ednh x\u00e1c n\u01a1i m\u00e3 b\u1eaft \u0111\u1ea7u v\u00e0 k\u1ebft th\u00fac.<\/p>\n\n\n\n

\u0110\u1ed9 t\u01b0\u01a1ng ph\u1ea3n c\u0169ng quan tr\u1ecdng kh\u00f4ng k\u00e9m v\u00ec m\u00e1y qu\u00e9t x\u00e1c \u0111\u1ecbnh c\u00e1c m\u00f4-\u0111un d\u1ef1a tr\u00ean s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 \u0111\u1ed9 ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng gi\u1eefa c\u00e1c \u00f4 vu\u00f4ng t\u1ed1i v\u00e0 n\u1ec1n s\u00e1ng. M\u1eb7c d\u00f9 c\u00f3 th\u1ec3 t\u00f9y ch\u1ec9nh th\u01b0\u01a1ng hi\u1ec7u, b\u1ea1n n\u00ean lu\u00f4n tu\u00e2n th\u1ee7 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t v\u1ec1 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n m\u00e0u c\u1ee7a m\u00e3 QR<\/a> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ti\u1ec1n c\u1ea3nh t\u1ed1i h\u01a1n \u0111\u00e1ng k\u1ec3 so v\u1edbi h\u1eadu c\u1ea3nh. V\u00ed d\u1ee5, m\u00e3 \u0111en tr\u00ean n\u1ec1n tr\u1eafng cung c\u1ea5p t\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n 21:1, \u0111\u00e2y l\u00e0 ti\u00eau chu\u1ea9n v\u00e0ng v\u1ec1 \u0111\u1ed9 tin c\u1eady tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb.<\/p>\n\n\n\n

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B\u1eaft \u0111\u1ea7u qu\u00e9t ngay h\u00f4m nay<\/strong>: T\u1ea1o m\u00e3 c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao, s\u1eb5n s\u00e0ng in v\u1edbi tr\u00ecnh t\u1ea1o m\u00e3 QR<\/a> \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o chi\u1ebfn d\u1ecbch c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c qu\u00e9t ho\u00e0n h\u1ea3o m\u1ecdi l\u00fac.<\/p>\n<\/blockquote>\n\n\n\n

X\u00e1c minh v\u00e0 Ki\u1ec3m so\u00e1t ch\u1ea5t l\u01b0\u1ee3ng<\/h2>\n\n\n\n

Tr\u01b0\u1edbc khi ho\u00e0n t\u1ea5t b\u1ea5t k\u1ef3 l\u1ea7n in n\u00e0o, \u0111i\u1ec1u c\u1ea7n thi\u1ebft l\u00e0 ph\u1ea3i x\u00e1c th\u1ef1c thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00f4ng c\u1ee5 ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng in m\u00e3 QR<\/a>. C\u00f4ng c\u1ee5 n\u00e0y c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh xem \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u1ee7a b\u1ea1n qu\u00e1 th\u1ea5p (in ti\u00eau chu\u1ea9n y\u00eau c\u1ea7u \u00edt nh\u1ea5t 300 DPI) hay k\u00edch th\u01b0\u1edbc c\u1ee7a b\u1ea1n kh\u00f4ng \u0111\u1ee7 cho tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng d\u1ef1 ki\u1ebfn. Th\u1eed nghi\u1ec7m m\u00e3 trong \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf \u2013 ch\u1eb3ng h\u1ea1n nh\u01b0 \u00e1nh s\u00e1ng kh\u00e1c nhau ho\u1eb7c v\u1edbi c\u00e1c m\u1eabu \u0111i\u1ec7n tho\u1ea1i c\u0169 h\u01a1n \u2013 cung c\u1ea5p x\u00e1c nh\u1eadn cu\u1ed1i c\u00f9ng r\u1eb1ng thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n \u0111\u00e3 s\u1eb5n s\u00e0ng \u0111\u1ec3 t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00f4ng ch\u00fang.<\/p>\n\n\n\n

N\u1ebfu b\u1ea1n \u0111\u00e3 in ho\u1eb7c thi\u1ebft k\u1ebf m\u1ed9t m\u00e3 v\u00e0 mu\u1ed1n ki\u1ec3m tra hi\u1ec7u su\u1ea5t c\u1ee7a n\u00f3, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u1ed9t m\u00e1y qu\u00e9t m\u00e3 QR tr\u1ef1c tuy\u1ebfn<\/a> \u0111\u1ec3 x\u00e1c minh r\u1eb1ng c\u00e1c m\u00f4-\u0111un c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c. C\u00e1ch ti\u1ebfp c\u1eadn ch\u1ee7 \u0111\u1ed9ng n\u00e0y gi\u00fap ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 t\u00e0i nguy\u00ean b\u1eb1ng c\u00e1ch ph\u00e1t hi\u1ec7n c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 kh\u1ea3 n\u0103ng qu\u00e9t tr\u01b0\u1edbc khi ch\u00fang \u0111\u1ebfn tay kh\u00e1ch h\u00e0ng.<\/p>\n\n\n\n

C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n
K\u00edch th\u01b0\u1edbc nh\u1ecf nh\u1ea5t tuy\u1ec7t \u0111\u1ed1i cho m\u00e3 QR \u0111\u01b0\u1ee3c in l\u00e0 bao nhi\u00eau?<\/strong>

K\u00edch th\u01b0\u1edbc t\u1ed1i thi\u1ec3u tuy\u1ec7t \u0111\u1ed1i \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb \u0111\u1ec3 qu\u00e9t \u0111\u00e1ng tin c\u1eady cho ng\u01b0\u1eddi ti\u00eau d\u00f9ng l\u00e0 2 x 2 cm (0.8 x 0.8 inch). M\u1eb7c d\u00f9 m\u1ed9t s\u1ed1 m\u00e1y qu\u00e9t ti\u00ean ti\u1ebfn c\u00f3 th\u1ec3 \u0111\u1ecdc m\u00e3 nh\u1ecf t\u1edbi 1 cm, nh\u01b0ng camera \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh ti\u00eau chu\u1ea9n th\u01b0\u1eddng g\u1eb7p kh\u00f3 kh\u0103n khi l\u1ea5y n\u00e9t \u1edf k\u00edch th\u01b0\u1edbc \u0111\u00f3, d\u1eabn \u0111\u1ebfn t\u1ef7 l\u1ec7 l\u1ed7i cao.<\/p> <\/div>

Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c m\u00e0u kh\u00e1c nhau c\u00f3 l\u00e0m thay \u0111\u1ed5i y\u00eau c\u1ea7u v\u1ec1 k\u00edch th\u01b0\u1edbc kh\u00f4ng?<\/strong>

C\u00f3, m\u1ed9t c\u00e1ch gi\u00e1n ti\u1ebfp. N\u1ebfu b\u1ea1n ch\u1ecdn m\u1ed9t c\u1eb7p m\u00e0u c\u00f3 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n th\u1ea5p h\u01a1n, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u00e0u xanh \u0111\u1eadm tr\u00ean n\u1ec1n x\u00e1m nh\u1ea1t, b\u1ea1n n\u00ean t\u0103ng k\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd c\u1ee7a m\u00e3 QR. K\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n gi\u00fap c\u1ea3m bi\u1ebfn camera ph\u00e2n bi\u1ec7t c\u00e1c m\u00f4-\u0111un t\u1ed1t h\u01a1n khi s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 m\u00e0u s\u1eafc kh\u00f4ng s\u1eafc n\u00e9t nh\u01b0 \u0111en tr\u00ean tr\u1eafng.<\/p> <\/div>

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00f4i \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc m\u00e3 QR cho m\u1ed9t bi\u1ec3n qu\u1ea3ng c\u00e1o ngo\u00e0i tr\u1eddi?<\/strong>

B\u1ea1n n\u00ean \u00e1p d\u1ee5ng quy t\u1eafc 10:1 d\u1ef1a tr\u00ean kho\u1ea3ng c\u00e1ch c\u1ee7a nh\u1eefng ng\u01b0\u1eddi xem g\u1ea7n nh\u1ea5t. N\u1ebfu m\u1ecdi ng\u01b0\u1eddi \u0111ang qu\u00e9t t\u1eeb kho\u1ea3ng c\u00e1ch 50 feet, m\u00e3 ph\u1ea3i r\u1ed9ng \u00edt nh\u1ea5t 5 feet. Ngo\u00e0i ra, h\u00e3y \u0111\u1ea3m b\u1ea3o m\u00e3 \u0111\u01b0\u1ee3c \u0111\u1eb7t c\u00e1ch xa c\u00e1c c\u1ea1nh n\u01a1i \u00e1nh s\u00e1ng ch\u00f3i ho\u1eb7c b\u00f3ng t\u1ed1i c\u00f3 th\u1ec3 che khu\u1ea5t v\u00f9ng y\u00ean t\u0129nh.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"

H\u1ecdc c\u00e1ch t\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc m\u00e3 QR ch\u00ednh x\u00e1c b\u1eb1ng quy t\u1eafc qu\u00e9t 10:1. \u0110\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng qu\u00e9t tr\u00ean danh thi\u1ebfp, \u00e1p ph\u00edch v\u00e0 bi\u1ec3n qu\u1ea3ng c\u00e1o v\u1edbi h\u01b0\u1edbng d\u1eabn n\u00e0y.<\/p>","protected":false},"author":17,"featured_media":50396,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[2635],"tags":[],"class_list":["post-46057","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nHow QR Code Size Impacts Scannability and Visibility<\/title>\n<meta name=\"description\" content=\"Learn how to calculate the correct QR code size using the 10:1 scanning rule. 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While some advanced scanners can read codes as small as 1 cm, standard smartphone cameras often struggle to focus at that scale, leading to high failure rates.\",\"inLanguage\":\"vi\"},\"inLanguage\":\"vi\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/pageloot.com\\\/blog\\\/how-qr-code-size-impacts-visibility\\\/#faq-question-7165f4d1034e\",\"position\":2,\"url\":\"https:\\\/\\\/pageloot.com\\\/blog\\\/how-qr-code-size-impacts-visibility\\\/#faq-question-7165f4d1034e\",\"name\":\"Does using different colors change the size requirements?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, indirectly. If you choose a lower-contrast color pairing, such as dark blue on a light gray background, you should increase the physical size of the QR code. 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Siim c\u00f3 n\u1ec1n t\u1ea3ng k\u1ef9 thu\u1eadt s\u1ed1 s\u00e2u r\u1ed9ng v\u1edbi h\u01a1n 10 n\u0103m kinh nghi\u1ec7m v\u1eefng ch\u1eafc trong l\u0129nh v\u1ef1c Ph\u1ea7n m\u1ec1m d\u01b0\u1edbi d\u1ea1ng d\u1ecbch v\u1ee5 (SaaS), m\u1ed9t minh ch\u1ee9ng cho ki\u1ebfn th\u1ee9c s\u00e2u r\u1ed9ng c\u1ee7a \u00f4ng v\u1ec1 c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt s\u1ed1.","sameAs":["https:\/\/www.linkedin.com\/in\/siim-tiigimagi\/"]},{"@type":"Question","@id":"https:\/\/pageloot.com\/blog\/how-qr-code-size-impacts-visibility\/#faq-question-0811c0027ebe","position":1,"url":"https:\/\/pageloot.com\/blog\/how-qr-code-size-impacts-visibility\/#faq-question-0811c0027ebe","name":"K\u00edch th\u01b0\u1edbc nh\u1ecf nh\u1ea5t tuy\u1ec7t \u0111\u1ed1i cho m\u00e3 QR \u0111\u01b0\u1ee3c in l\u00e0 bao nhi\u00eau?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The recommended absolute minimum for reliable consumer scanning is 2 x 2 cm (0.8 x 0.8 inches). While some advanced scanners can read codes as small as 1 cm, standard smartphone cameras often struggle to focus at that scale, leading to high failure rates.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/blog\/how-qr-code-size-impacts-visibility\/#faq-question-7165f4d1034e","position":2,"url":"https:\/\/pageloot.com\/blog\/how-qr-code-size-impacts-visibility\/#faq-question-7165f4d1034e","name":"Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c m\u00e0u kh\u00e1c nhau c\u00f3 l\u00e0m thay \u0111\u1ed5i y\u00eau c\u1ea7u v\u1ec1 k\u00edch th\u01b0\u1edbc kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes, indirectly. If you choose a lower-contrast color pairing, such as dark blue on a light gray background, you should increase the physical size of the QR code. A larger size helps the camera sensor better distinguish the modules when the color difference is not as sharp as black-on-white.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/blog\/how-qr-code-size-impacts-visibility\/#faq-question-095655be1ac2","position":3,"url":"https:\/\/pageloot.com\/blog\/how-qr-code-size-impacts-visibility\/#faq-question-095655be1ac2","name":"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00f4i \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc m\u00e3 QR cho m\u1ed9t bi\u1ec3n qu\u1ea3ng c\u00e1o ngo\u00e0i tr\u1eddi?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"You should apply the 10:1 rule based on the distance of the closest viewers. If people are scanning from 50 feet away, the code should be at least 5 feet wide. Additionally, ensure the code is placed away from edges where glare or shadows might obscure the quiet zone.","inLanguage":"vi"},"inLanguage":"vi"}]}},"_links":{"self":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/46057","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/comments?post=46057"}],"version-history":[{"count":5,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/46057\/revisions"}],"predecessor-version":[{"id":52735,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/46057\/revisions\/52735"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/media\/50396"}],"wp:attachment":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/media?parent=46057"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/categories?post=46057"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/tags?post=46057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}