{"id":43969,"date":"2025-08-04T05:01:18","date_gmt":"2025-08-04T05:01:18","guid":{"rendered":"https:\/\/staging.pageloot.com\/uncategorized\/how-to-improve-qr-code-readability\/"},"modified":"2026-04-22T13:14:08","modified_gmt":"2026-04-22T13:14:08","slug":"how-to-improve-qr-code-readability","status":"publish","type":"post","link":"https:\/\/pageloot.com\/vi\/blog\/how-to-improve-qr-code-readability\/","title":{"rendered":"C\u00e1ch l\u00e0m cho m\u00e3 QR d\u1ec5 qu\u00e9t h\u01a1n"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Kh\u00e1ch h\u00e0ng c\u1ee7a b\u1ea1n c\u00f3 \u0111ang g\u1eb7p kh\u00f3 kh\u0103n khi qu\u00e9t m\u00e3 QR tr\u00ean t\u00e0i li\u1ec7u ti\u1ebfp th\u1ecb c\u1ee7a b\u1ea1n kh\u00f4ng? M\u1ed9t m\u00e3 kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng d\u1eabn \u0111\u1ebfn m\u1ea5t t\u01b0\u01a1ng t\u00e1c v\u00e0 g\u00e2y kh\u00f3 ch\u1ecbu cho th\u01b0\u01a1ng hi\u1ec7u. H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u1ea3i th\u00edch c\u00e1c ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt v\u00e0 thi\u1ebft k\u1ebf c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u00e3 QR c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng ho\u00e0n h\u1ea3o m\u1ed7i khi \u0111\u01b0\u1ee3c qu\u00e9t.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u1ea1i sao \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n m\u00e0u s\u1eafc l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a kh\u1ea3 n\u0103ng qu\u00e9t<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">L\u00fd do ph\u1ed5 bi\u1ebfn nh\u1ea5t khi\u1ebfn m\u00e3 QR kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng l\u00e0 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n m\u00e0u s\u1eafc k\u00e9m. M\u00e1y qu\u00e9t ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch ph\u00e1t hi\u1ec7n s\u1ef1 kh\u00e1c bi\u1ec7t trong ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng gi\u1eefa c\u00e1c m\u00f4-\u0111un t\u1ed1i v\u00e0 n\u1ec1n s\u00e1ng. H\u00e3y h\u00ecnh dung c\u00e1c m\u00f4-\u0111un nh\u01b0 mi\u1ebfng b\u1ecdt bi\u1ec3n v\u00e0 n\u1ec1n nh\u01b0 m\u1ed9t t\u1ea5m g\u01b0\u01a1ng; m\u00e0u t\u1ed1i h\u01a1n h\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng trong khi m\u00e0u s\u00e1ng h\u01a1n ph\u1ea3n x\u1ea1 n\u00f3. N\u1ebfu m\u00e0u s\u1eafc qu\u00e1 gi\u1ed1ng nhau, m\u00e1y qu\u00e9t kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c m\u1eabu d\u1eef li\u1ec7u, khi\u1ebfn qu\u00e1 tr\u00ecnh qu\u00e9t th\u1ea5t b\u1ea1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady, h\u00e3y lu\u00f4n s\u1eed d\u1ee5ng m\u00e0u t\u1ed1i cho ti\u1ec1n c\u1ea3nh v\u00e0 m\u00e0u s\u00e1ng cho n\u1ec1n. M\u1eb7c d\u00f9 \u0111en tr\u00ean tr\u1eafng l\u00e0 ti\u00eau chu\u1ea9n c\u00f4ng nghi\u1ec7p \u0111\u1ec3 c\u00f3 kh\u1ea3 n\u0103ng hi\u1ec3n th\u1ecb t\u1ed1i \u0111a, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u00e0u s\u1eafc th\u01b0\u01a1ng hi\u1ec7u mi\u1ec5n l\u00e0 b\u1ea1n duy tr\u00ec t\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n \u00edt nh\u1ea5t 4:1. B\u1ea1n n\u00ean tr\u00e1nh s\u1eed d\u1ee5ng m\u00e0u \u0111\u1ecf ho\u1eb7c cam cho c\u00e1c m\u00f4-\u0111un v\u00ec nhi\u1ec1u m\u00e1y qu\u00e9t h\u1ed3ng ngo\u1ea1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u00f4i tr\u01b0\u1eddng b\u00e1n l\u1ebb kh\u00f4ng th\u1ec3 \u201cnh\u00ecn th\u1ea5y\u201d c\u00e1c m\u00e0u n\u00e0y tr\u00ean b\u1ec1 m\u1eb7t s\u00e1ng. \u0110\u1ec3 t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 c\u00e1ch ch\u1ecdn m\u00e0u hi\u1ec7u qu\u1ea3, b\u1ea1n c\u00f3 th\u1ec3 xem h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/pageloot.com\/vi\/blog\/qr-code-color-contrast-best-practices\/\">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>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eb7c d\u00f9 c\u00e1c thi\u1ebft k\u1ebf \u0111\u1ea3o ng\u01b0\u1ee3c \u2013 m\u00f4-\u0111un s\u00e1ng tr\u00ean n\u1ec1n t\u1ed1i \u2013 \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng v\u1ec1 m\u1eb7t th\u1ea9m m\u1ef9, nh\u01b0ng ch\u00fang th\u01b0\u1eddng k\u00e9m tin c\u1eady h\u01a1n. Nghi\u00ean c\u1ee9u cho th\u1ea5y c\u00e1c m\u00e3 \u0111\u1ea3o ng\u01b0\u1ee3c c\u00f3 th\u1ec3 ch\u1eadm h\u01a1n t\u1edbi 40% trong vi\u1ec7c nh\u1eadn di\u1ec7n, v\u00e0 m\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng camera m\u1eb7c \u0111\u1ecbnh c\u1ee7a \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u1ecdc \u0111\u01b0\u1ee3c ch\u00fang ho\u00e0n to\u00e0n. N\u1ebfu b\u1ea1n ph\u1ea3i s\u1eed d\u1ee5ng m\u1ed9t b\u1ea3ng m\u00e0u t\u00f9y ch\u1ec9nh, h\u00e3y \u01b0u ti\u00ean c\u00e1c t\u00f4ng m\u00e0u t\u1ed1i nh\u01b0 xanh navy, than ch\u00ec ho\u1eb7c \u0111\u1ecf t\u00eda tr\u00ean n\u1ec1n tr\u1eafng ho\u1eb7c be.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">H\u01b0\u1edbng d\u1eabn v\u1ec1 k\u00edch th\u01b0\u1edbc v\u00e0 c\u00f4ng th\u1ee9c kho\u1ea3ng c\u00e1ch 10:1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t m\u00e3 QR qu\u00e1 nh\u1ecf so v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u1ee7a n\u00f3 s\u1ebd kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng v\u00ec camera \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh kh\u00f4ng th\u1ec3 ph\u00e2n gi\u1ea3i c\u00e1c m\u00f4-\u0111un ri\u00eang l\u1ebb. Nh\u01b0 chuy\u00ean gia Tanner Kohler l\u01b0u \u00fd, b\u1ea1n c\u00e0ng mong \u0111\u1ee3i ng\u01b0\u1eddi d\u00f9ng \u1edf xa, b\u1ea1n c\u00e0ng n\u00ean l\u00e0m m\u00e3 l\u1edbn h\u01a1n. \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc ch\u00ednh x\u00e1c, b\u1ea1n c\u00f3 th\u1ec3 tu\u00e2n theo c\u00f4ng th\u1ee9c kho\u1ea3ng c\u00e1ch qu\u00e9t 10:1: c\u1ee9 m\u1ed7i 10 \u0111\u01a1n v\u1ecb kho\u1ea3ng c\u00e1ch gi\u1eefa m\u00e1y qu\u00e9t v\u00e0 m\u00e3, m\u00e3 QR ph\u1ea3i r\u1ed9ng \u00edt nh\u1ea5t 1 \u0111\u01a1n v\u1ecb. V\u00ed d\u1ee5, m\u1ed9t m\u00e3 tr\u00ean \u00e1p ph\u00edch d\u1ef1 \u0111\u1ecbnh \u0111\u01b0\u1ee3c qu\u00e9t t\u1eeb kho\u1ea3ng c\u00e1ch 10 feet ph\u1ea3i r\u1ed9ng \u00edt nh\u1ea5t 1 foot.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi c\u00e1c t\u01b0\u01a1ng t\u00e1c g\u1ea7n h\u01a1n, ch\u1eb3ng h\u1ea1n nh\u01b0 tr\u00ean c\u00e1c t\u00e0i li\u1ec7u c\u1ea7m tay, c\u00f3 c\u00e1c m\u1ee9c t\u1ed1i thi\u1ec3u \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp \u0111\u1ec3 ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng pixel h\u00f3a v\u00e0 l\u1ed7i qu\u00e9t. Ngay c\u1ea3 \u1edf c\u1ef1 ly g\u1ea7n, b\u1ea1n kh\u00f4ng bao gi\u1edd n\u00ean in m\u00e3 nh\u1ecf h\u01a1n 0.4 x 0.4 inch, m\u1eb7c d\u00f9 0.8 x 0.8 inch l\u00e0 m\u1ee9c t\u1ed1i thi\u1ec3u \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb \u0111\u1ec3 c\u00f3 hi\u1ec7u su\u1ea5t nh\u1ea5t qu\u00e1n tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i thi\u1ebft b\u1ecb. H\u00e3y xem x\u00e9t c\u00e1c ti\u00eau chu\u1ea9n chung n\u00e0y cho c\u00e1c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Danh thi\u1ebfp: 0.8 x 0.8 inch (2 x 2 cm)<\/li>\n<li>Bao b\u00ec s\u1ea3n ph\u1ea9m: 1.0 x 1.0 inch (2.5 x 2.5 cm)<\/li>\n<li>T\u1edd r\u01a1i v\u00e0 t\u00e0i li\u1ec7u qu\u1ea3ng c\u00e1o: 1.2 x 1.2 inch (3 x 3 cm)<\/li>\n<li>\u00c1p ph\u00edch trong nh\u00e0: 2.0 x 2.0 inch (5 x 5 cm)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 t\u00ecm k\u00edch th\u01b0\u1edbc ph\u00f9 h\u1ee3p cho c\u00e1c b\u1ec1 m\u1eb7t \u0111\u1ed9c \u0111\u00e1o nh\u01b0 v\u1ea3i ho\u1eb7c b\u00eca c\u1ee9ng, h\u00e3y tham kh\u1ea3o b\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/pageloot.com\/vi\/blog\/qr-code-sizing-for-different-print-materials\/\">k\u00edch th\u01b0\u1edbc m\u00e3 QR cho c\u00e1c v\u1eadt li\u1ec7u in kh\u00e1c nhau<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">B\u1ea3o v\u1ec7 V\u00f9ng y\u00ean t\u0129nh \u0111\u1ec3 qu\u00e9t nhanh h\u01a1n<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cV\u00f9ng y\u00ean t\u0129nh\u201d l\u00e0 \u0111\u01b0\u1eddng vi\u1ec1n tr\u1ed1ng xung quanh m\u00e3 QR, t\u00e1ch n\u00f3 kh\u1ecfi c\u00e1c y\u1ebfu t\u1ed1 thi\u1ebft k\u1ebf kh\u00e1c. Kh\u00f4ng gian n\u00e0y cho m\u00e1y qu\u00e9t bi\u1ebft m\u00e3 b\u1eaft \u0111\u1ea7u v\u00e0 k\u1ebft th\u00fac \u1edf \u0111\u00e2u. N\u1ebfu kh\u00f4ng c\u00f3 v\u00f9ng \u0111\u1ec7m n\u00e0y, v\u0103n b\u1ea3n, h\u00ecnh \u1ea3nh xung quanh ho\u1eb7c th\u1eadm ch\u00ed m\u00e9p gi\u1ea5y c\u00f3 th\u1ec3 g\u00e2y nhi\u1ec5u qu\u00e1 tr\u00ecnh qu\u00e9t, d\u1eabn \u0111\u1ebfn t\u1ef7 l\u1ec7 b\u1ecf qua cao.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Theo ti\u00eau chu\u1ea9n ISO\/IEC 18004, v\u00f9ng y\u00ean t\u0129nh ph\u1ea3i r\u1ed9ng \u00edt nh\u1ea5t b\u1ed1n m\u00f4-\u0111un \u1edf t\u1ea5t c\u1ea3 c\u00e1c c\u1ea1nh. V\u00ed d\u1ee5, n\u1ebfu c\u00e1c m\u00f4-\u0111un m\u00e3 c\u1ee7a b\u1ea1n r\u1ed9ng 2 mm, \u0111\u01b0\u1eddng vi\u1ec1n c\u1ee7a b\u1ea1n ph\u1ea3i c\u00e1ch xa \u00edt nh\u1ea5t 8 mm so v\u1edbi b\u1ea5t k\u1ef3 y\u1ebfu t\u1ed1 thi\u1ebft k\u1ebf n\u00e0o kh\u00e1c. B\u1ea1n n\u00ean coi v\u00f9ng y\u00ean t\u0129nh nh\u01b0 m\u1ed9t v\u00f9ng \u0111\u1ec7m b\u1ea3o v\u1ec7; t\u1ed1t h\u01a1n l\u00e0 gi\u1ea3m k\u00edch th\u01b0\u1edbc t\u1ed5ng th\u1ec3 c\u1ee7a m\u00e3 m\u1ed9t ch\u00fat c\u00f2n h\u01a1n l\u00e0 thu h\u1eb9p l\u1ec1 thi\u1ebft y\u1ebfu n\u00e0y.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/03\/simple-infographic-aspect-ratio-9-16-white-background-with-black-text-and-blue-7703-1ab540eba995.webp\" alt=\"\u0110\u1ed3 h\u1ecda th\u00f4ng tin qu\u00e9t QR\" \/><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>T\u1ed1i \u01b0u kh\u1ea3 n\u0103ng qu\u00e9t c\u1ee7a b\u1ea1n ngay h\u00f4m nay<\/strong>D\u00f9ng c\u1ee7a ch\u00fang t\u00f4i <a href=\"https:\/\/pageloot.com\/vi\/qr-code-generator\/\">tr\u00ecnh t\u1ea1o m\u00e3 QR<\/a> \u0111\u1ec3 t\u1ea1o ra c\u00e1c m\u00e3 c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao t\u1ef1 \u0111\u1ed9ng bao g\u1ed3m v\u00f9ng y\u00ean t\u0129nh v\u00e0 c\u00e0i \u0111\u1eb7t \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n ch\u00ednh x\u00e1c cho th\u01b0\u01a1ng hi\u1ec7u c\u1ee7a b\u1ea1n.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Gi\u1ea3m \u0111\u1ed9 ph\u1ee9c t\u1ea1p v\u1edbi m\u00e3 QR \u0111\u1ed9ng<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e0ng nhi\u1ec1u th\u00f4ng tin b\u1ea1n m\u00e3 h\u00f3a v\u00e0o m\u1ed9t m\u00e3 QR t\u0129nh, m\u1eabu m\u00f4-\u0111un c\u00e0ng tr\u1edf n\u00ean d\u00e0y \u0111\u1eb7c. M\u1eadt \u0111\u1ed9 cao n\u00e0y t\u1ea1o ra m\u1ed9t v\u1ebb ngo\u00e0i \u201c\u0111\u00f4ng \u0111\u00fac\u201d m\u00e0 c\u00e1c camera \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh c\u0169 h\u01a1n r\u1ea5t kh\u00f3 x\u1eed l\u00fd. \u0110\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 n\u00e0y, nhi\u1ec1u nh\u00e0 ti\u1ebfp th\u1ecb s\u1eed d\u1ee5ng <a href=\"https:\/\/pageloot.com\/vi\/dynamic-qr-code-generator\/\">m\u00e3 QR \u0111\u1ed9ng<\/a>. C\u00e1c m\u00e3 n\u00e0y m\u00e3 h\u00f3a m\u1ed9t URL chuy\u1ec3n h\u01b0\u1edbng ng\u1eafn thay v\u00ec m\u1ed9t chu\u1ed7i d\u1eef li\u1ec7u d\u00e0i, gi\u1eef cho m\u1eabu \u0111\u01a1n gi\u1ea3n v\u00e0 c\u00e1c m\u00f4-\u0111un l\u1edbn, \u0111\u1ea3m b\u1ea3o qu\u00e9t nhanh ngay c\u1ea3 \u1edf k\u00edch th\u01b0\u1edbc nh\u1ecf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Qu\u1ea3n l\u00fd m\u1eadt \u0111\u1ed9 d\u1eef li\u1ec7u c\u0169ng li\u00ean quan \u0111\u1ebfn c\u00e1c c\u1ea5p \u0111\u1ed9 s\u1eeda l\u1ed7i. S\u1eeda l\u1ed7i cho ph\u00e9p m\u1ed9t m\u00e3 v\u1eabn ho\u1ea1t \u0111\u1ed9ng ngay c\u1ea3 khi n\u00f3 b\u1ecb che khu\u1ea5t m\u1ed9t ph\u1ea7n ho\u1eb7c b\u1ecb h\u1ecfng. C\u00f3 b\u1ed1n c\u1ea5p \u0111\u1ed9 ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi logic Reed\u2013Solomon:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>C\u1ea5p \u0111\u1ed9 L (kh\u00f4i ph\u1ee5c 7%): T\u1ed1t nh\u1ea5t cho m\u00e0n h\u00ecnh k\u1ef9 thu\u1eadt s\u1ed1 s\u1ea1ch, \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao.<\/li>\n<li>C\u1ea5p \u0111\u1ed9 M (kh\u00f4i ph\u1ee5c 15%): Ti\u00eau chu\u1ea9n cho h\u1ea7u h\u1ebft c\u00e1c t\u00e0i li\u1ec7u ti\u1ebfp th\u1ecb.<\/li>\n<li>C\u1ea5p \u0111\u1ed9 Q (kh\u00f4i ph\u1ee5c 25%): \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c m\u00e3 c\u00f3 logo nh\u1ecf ho\u1eb7c nh\u1eefng m\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf khu v\u1ef1c c\u00f3 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp cao.<\/li>\n<li>C\u1ea5p \u0111\u1ed9 H (kh\u00f4i ph\u1ee5c 30%): T\u1ed1t nh\u1ea5t cho bi\u1ec3n b\u00e1o ngo\u00e0i tr\u1eddi, b\u1ecdc xe ho\u1eb7c m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p d\u1ec5 b\u1ecb h\u01b0 h\u1ea1i.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">B\u1ea1n c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 vi\u1ec7c t\u00ecm ki\u1ebfm s\u1ef1 c\u00e2n b\u1eb1ng ph\u00f9 h\u1ee3p gi\u1eefa d\u1eef li\u1ec7u v\u00e0 kh\u1ea3 n\u0103ng qu\u00e9t trong h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/pageloot.com\/vi\/how-to\/understand-qr-code-data-limits\/\">c\u00e1ch hi\u1ec3u gi\u1edbi h\u1ea1n d\u1eef li\u1ec7u m\u00e3 QR<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t cho thi\u1ebft k\u1ebf v\u00e0 logo c\u00f3 th\u01b0\u01a1ng hi\u1ec7u<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00eam logo c\u00f3 th\u1ec3 t\u0103ng ni\u1ec1m tin th\u01b0\u01a1ng hi\u1ec7u v\u00e0 t\u1ef7 l\u1ec7 qu\u00e9t, v\u00ec c\u00e1c m\u00e3 c\u00f3 th\u01b0\u01a1ng hi\u1ec7u c\u00f3 th\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c m\u1ee9c \u0111\u1ed9 t\u01b0\u01a1ng t\u00e1c cao h\u01a1n t\u1edbi 30% so v\u1edbi c\u00e1c m\u00e3 chung chung. Tuy nhi\u00ean, logo ho\u1ea1t \u0111\u1ed9ng nh\u01b0 \u201ch\u01b0 h\u1ea1i\u201d \u0111\u1ed1i v\u1edbi d\u1eef li\u1ec7u m\u00e3. \u0110\u1ec3 duy tr\u00ec \u0111\u1ed9 tin c\u1eady, b\u1ea1n ph\u1ea3i \u0111\u1eb7t logo \u1edf gi\u1eefa v\u00e0 \u0111\u1ea3m b\u1ea3o n\u00f3 kh\u00f4ng che qu\u00e1 20% \u0111\u1ebfn 25% t\u1ed5ng di\u1ec7n t\u00edch. \u0110i\u1ec1u quan tr\u1ecdng l\u00e0 logo kh\u00f4ng \u0111\u01b0\u1ee3c che khu\u1ea5t ba h\u00ecnh vu\u00f4ng l\u1edbn \u1edf c\u00e1c g\u00f3c, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1eabu t\u00ecm ki\u1ebfm, m\u00e0 m\u00e1y qu\u00e9t s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111\u1ecbnh h\u01b0\u1edbng h\u00ecnh \u1ea3nh.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/03\/simple-clean-illustration-aspect-ratio-1-1-white-background-with-black-text-an-681-b9ef0ee1a60e.webp\" alt=\"Thi\u1ebft k\u1ebf QR c\u00f3 th\u01b0\u01a1ng hi\u1ec7u\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Khi k\u1ebft h\u1ee3p c\u00e1c y\u1ebfu t\u1ed1 th\u01b0\u01a1ng hi\u1ec7u, b\u1ea1n n\u00ean lu\u00f4n s\u1eed d\u1ee5ng C\u1ea5p \u0111\u1ed9 s\u1eeda l\u1ed7i H \u0111\u1ec3 b\u00f9 \u0111\u1eafp cho c\u00e1c m\u00f4-\u0111un d\u1eef li\u1ec7u b\u1ecb logo che ph\u1ee7. \u0110\u1ec3 bi\u1ebft h\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc v\u1ec1 c\u00e1ch t\u1ea1o c\u00e1c thi\u1ebft k\u1ebf n\u00e0y m\u1ed9t c\u00e1ch an to\u00e0n, h\u00e3y xem h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/pageloot.com\/vi\/blog\/how-to-add-logos-to-qr-codes\/\">c\u00e1ch th\u00eam logo v\u00e0o m\u00e3 QR<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c c\u00e2n nh\u1eafc v\u1ec1 ch\u1ea5t li\u1ec7u v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng in<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1eadt li\u1ec7u b\u1ea1n ch\u1ecdn \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn c\u00e1ch \u00e1nh s\u00e1ng t\u01b0\u01a1ng t\u00e1c v\u1edbi m\u00e1y qu\u00e9t. C\u00e1c b\u1ec1 m\u1eb7t c\u00f3 \u0111\u1ed9 ph\u1ea3n chi\u1ebfu cao nh\u01b0 k\u00ednh, laminate b\u00f3ng ho\u1eb7c kim lo\u1ea1i c\u00f3 th\u1ec3 t\u1ea1o ra \u00e1nh s\u00e1ng ch\u00f3i l\u00e0m l\u00f3a camera. B\u1ea5t c\u1ee9 khi n\u00e0o c\u00f3 th\u1ec3, b\u1ea1n n\u00ean ch\u1ecdn b\u1ec1 m\u1eb7t m\u1edd \u0111\u1ec3 gi\u1ea3m ph\u1ea3n x\u1ea1. N\u1ebfu b\u1ea1n ph\u1ea3i in tr\u00ean b\u1ec1 m\u1eb7t cong, ch\u1eb3ng h\u1ea1n nh\u01b0 chai ho\u1eb7c lon, vi\u1ec7c t\u0103ng k\u00edch th\u01b0\u1edbc m\u00e3 c\u00f3 th\u1ec3 gi\u00fap b\u00f9 \u0111\u1eafp cho s\u1ef1 bi\u1ebfn d\u1ea1ng do bao b\u00ec g\u00e2y ra.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng pixel h\u00f3a v\u00e0 m\u00e3 b\u1ecb \u201cm\u1edd\u201d, b\u1ea1n n\u00ean tr\u00e1nh s\u1eed d\u1ee5ng c\u00e1c t\u1ec7p JPEG ho\u1eb7c PNG c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i th\u1ea5p cho vi\u1ec7c in \u1ea5n chuy\u00ean nghi\u1ec7p. Thay v\u00e0o \u0111\u00f3, h\u00e3y xu\u1ea5t m\u00e3 c\u1ee7a b\u1ea1n \u1edf \u0111\u1ecbnh d\u1ea1ng vector nh\u01b0 SVG, EPS ho\u1eb7c PDF. C\u00e1c t\u1ec7p vector v\u1eabn s\u1eafc n\u00e9t ho\u00e0n h\u1ea3o \u1edf m\u1ecdi k\u00edch th\u01b0\u1edbc, \u0111\u1ea3m b\u1ea3o m\u00e1y qu\u00e9t c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c c\u1ea1nh s\u1eafc n\u00e9t c\u1ee7a t\u1eebng m\u00f4-\u0111un. Tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n m\u1ed9t \u0111\u1ee3t in l\u1edbn, b\u1ea1n n\u00ean s\u1eed d\u1ee5ng m\u1ed9t <a href=\"https:\/\/pageloot.com\/vi\/blog\/qr-code-print-quality-checker\/\">c\u00f4ng c\u1ee5 ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng in m\u00e3 QR<\/a> \u0111\u1ec3 x\u00e1c minh r\u1eb1ng thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n chuy\u00ean nghi\u1ec7p.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>\u0110\u1ea3m b\u1ea3o ti\u1ebfp th\u1ecb c\u1ee7a b\u1ea1n b\u1ec1n v\u1eefng trong t\u01b0\u01a1ng lai<\/strong>V\u1edbi m\u1ed9t <a href=\"https:\/\/pageloot.com\/vi\/dynamic-qr-code-generator\/\">tr\u00ecnh t\u1ea1o m\u00e3 QR \u0111\u1ed9ng<\/a>, b\u1ea1n c\u00f3 th\u1ec3 c\u1eadp nh\u1eadt li\u00ean k\u1ebft \u0111\u00edch c\u1ee7a m\u00ecnh ngay c\u1ea3 sau khi t\u00e0i li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c in, gi\u00fap b\u1ea1n tr\u00e1nh ph\u1ea3i in l\u1ea1i t\u1ed1n k\u00e9m n\u1ebfu URL chi\u1ebfn d\u1ecbch thay \u0111\u1ed5i.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-0166ad981fbc\"><strong class=\"schema-faq-question\">K\u00edch th\u01b0\u1edbc t\u1ed1i thi\u1ec3u tuy\u1ec7t \u0111\u1ed1i cho m\u00e3 QR \u0111\u01b0\u1ee3c in l\u00e0 bao nhi\u00eau?<\/strong> <p class=\"schema-faq-answer\">M\u1eb7c d\u00f9 c\u00e1c ti\u00eau chu\u1ea9n k\u1ef9 thu\u1eadt cho ph\u00e9p k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n, nh\u01b0ng k\u00edch th\u01b0\u1edbc t\u1ed1i thi\u1ec3u th\u1ef1c t\u1ebf \u0111\u1ec3 qu\u00e9t \u0111\u00e1ng tin c\u1eady \u1edf kho\u1ea3ng c\u00e1ch m\u1ed9t s\u1ea3i tay l\u00e0 0,8 x 0,8 inch (2 x 2 cm). C\u00e1c m\u00e3 nh\u1ecf h\u01a1n k\u00edch th\u01b0\u1edbc n\u00e0y th\u01b0\u1eddng kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng tr\u00ean c\u00e1c m\u1eabu \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh c\u0169 h\u01a1n ho\u1eb7c trong m\u00f4i tr\u01b0\u1eddng \u00e1nh s\u00e1ng kh\u00f4ng t\u1ed1i \u01b0u.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-897361a0694d\"><strong class=\"schema-faq-question\">\u00c1nh s\u00e1ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t m\u00e3 QR nh\u01b0 th\u1ebf n\u00e0o?<\/strong> <p class=\"schema-faq-answer\">M\u00f4i tr\u01b0\u1eddng thi\u1ebfu s\u00e1ng y\u00eau c\u1ea7u \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n cao h\u01a1n v\u00e0 k\u00edch th\u01b0\u1edbc m\u00f4-\u0111un l\u1edbn h\u01a1n \u0111\u1ec3 c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c. N\u1ebfu b\u1ea1n mong \u0111\u1ee3i m\u00e3 c\u1ee7a m\u00ecnh \u0111\u01b0\u1ee3c qu\u00e9t v\u00e0o ban \u0111\u00eam ho\u1eb7c trong m\u1ed9t nh\u00e0 h\u00e0ng thi\u1ebfu s\u00e1ng, b\u1ea1n n\u00ean \u01b0u ti\u00ean thi\u1ebft k\u1ebf \u0111en tr\u00ean n\u1ec1n tr\u1eafng v\u00e0 s\u1eed d\u1ee5ng m\u1ee9c \u0111\u1ed9 s\u1eeda l\u1ed7i cao h\u01a1n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u00e1y qu\u00e9t c\u00f3 th\u1ec3 gi\u1ea3i quy\u1ebft d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-fc2d2bba00bc\"><strong class=\"schema-faq-question\">T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng hi\u1ec7u \u1ee9ng chuy\u1ec3n m\u00e0u ho\u1eb7c \u0111\u1ed5 b\u00f3ng trong thi\u1ebft k\u1ebf m\u00e3 QR c\u1ee7a m\u00ecnh kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">T\u1ed1t nh\u1ea5t l\u00e0 tr\u00e1nh c\u00e1c hi\u1ec7u \u1ee9ng chuy\u1ec3n m\u00e0u v\u00e0 \u0111\u1ed5 b\u00f3ng v\u00ec ch\u00fang t\u1ea1o ra c\u00e1c t\u00f4ng m\u00e0u trung gian c\u00f3 th\u1ec3 g\u00e2y nh\u1ea7m l\u1eabn cho ph\u1ea7n m\u1ec1m qu\u00e9t. M\u00e1y qu\u00e9t t\u00ecm ki\u1ebfm s\u1ef1 kh\u00e1c bi\u1ec7t nh\u1ecb ph\u00e2n gi\u1eefa s\u00e1ng v\u00e0 t\u1ed1i; hi\u1ec7u \u1ee9ng chuy\u1ec3n m\u00e0u c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c v\u00f9ng \u201cx\u00e1m\u201d khi\u1ebfn m\u00e3 kh\u00f4ng th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c. H\u00e3y s\u1eed d\u1ee5ng m\u00e0u s\u1eafc \u0111\u1ed3ng nh\u1ea5t \u0111\u1ec3 c\u00f3 k\u1ebft qu\u1ea3 t\u1ed1t nh\u1ea5t.<\/p> <\/div> <\/div>\n\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c chi\u1ebfn d\u1ecbch c\u1ee7a b\u1ea1n hi\u1ec7u qu\u1ea3, b\u1ea1n n\u00ean t\u1eadp trung v\u00e0o vi\u1ec7c duy tr\u00ec \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n cao, k\u00edch th\u01b0\u1edbc ph\u00f9 h\u1ee3p v\u00e0 xu\u1ea5t t\u1ec7p vector ch\u1ea5t l\u01b0\u1ee3ng cao. N\u1ebfu b\u1ea1n \u0111ang qu\u1ea3n l\u00fd nhi\u1ec1u t\u00e0i li\u1ec7u chi\u1ebfn d\u1ecbch, vi\u1ec7c s\u1eed d\u1ee5ng m\u1ed9t <a href=\"https:\/\/pageloot.com\/vi\/qr-code-scanner\/\">M\u00e1y qu\u00e9t m\u00e3 QR<\/a> \u0111\u1ec3 ki\u1ec3m tra c\u00e1c thi\u1ebft k\u1ebf c\u1ee7a ri\u00eang b\u1ea1n trong \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng th\u1ef1c t\u1ebf l\u00e0 c\u00e1ch t\u1ed1t nh\u1ea5t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t. H\u00e3y l\u00e0m theo c\u00e1c h\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt n\u00e0y \u0111\u1ec3 bi\u1ebfn m\u1ecdi \u0111i\u1ec3m ti\u1ebfp x\u00fac v\u1eadt l\u00fd th\u00e0nh m\u1ed9t t\u01b0\u01a1ng t\u00e1c k\u1ef9 thu\u1eadt s\u1ed1 th\u00e0nh c\u00f4ng.<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u c\u00e1ch l\u00e0m cho m\u00e3 QR d\u1ec5 qu\u00e9t h\u01a1n v\u1edbi c\u00e1c m\u1eb9o k\u1ef9 thu\u1eadt v\u1ec1 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n m\u00e0u s\u1eafc, k\u00edch th\u01b0\u1edbc v\u00e0 v\u00f9ng y\u00ean t\u0129nh. 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V\u1edbi chuy\u00ean m\u00f4n s\u00e2u s\u1eafc k\u00e9o d\u00e0i h\u01a1n 5 n\u0103m ch\u1ec9 v\u1ec1 m\u00e3 QR, Siim \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t chuy\u00ean gia v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y trong l\u0129nh v\u1ef1c n\u00e0y. Anh \u1ea5y \u0111\u00e3 c\u00f3 nh\u1eefng b\u01b0\u1edbc ti\u1ebfn \u0111\u00e1ng k\u1ec3 trong vi\u1ec7c t\u1eadn d\u1ee5ng c\u00f4ng ngh\u1ec7 QR \u0111\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a v\u00e0 t\u0103ng c\u01b0\u1eddng c\u00e1c t\u01b0\u01a1ng t\u00e1c k\u1ef9 thu\u1eadt s\u1ed1. Cu\u1ed9c h\u00e0nh tr\u00ecnh c\u1ee7a anh kh\u00f4ng ch\u1ec9 b\u1eaft \u0111\u1ea7u \u1edf \u0111\u00e2y. 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-to-improve-qr-code-readability\/#faq-question-0166ad981fbc","position":1,"url":"https:\/\/pageloot.com\/blog\/how-to-improve-qr-code-readability\/#faq-question-0166ad981fbc","name":"K\u00edch th\u01b0\u1edbc t\u1ed1i thi\u1ec3u tuy\u1ec7t \u0111\u1ed1i cho m\u00e3 QR \u0111\u01b0\u1ee3c in l\u00e0 bao nhi\u00eau?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"While technical standards allow for smaller dimensions, the practical minimum for reliable scanning at arm's length is 0.8 x 0.8 inches (2 x 2 cm). Codes smaller than this often fail on older smartphone models or in environments with suboptimal lighting.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/blog\/how-to-improve-qr-code-readability\/#faq-question-897361a0694d","position":2,"url":"https:\/\/pageloot.com\/blog\/how-to-improve-qr-code-readability\/#faq-question-897361a0694d","name":"\u00c1nh s\u00e1ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t m\u00e3 QR nh\u01b0 th\u1ebf n\u00e0o?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Low-light environments require higher contrast and larger module sizes to be readable. If you expect your code to be scanned at night or in a dim restaurant, you should prioritize a black-on-white design and use a higher error correction level to ensure the scanner can accurately resolve the data.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/blog\/how-to-improve-qr-code-readability\/#faq-question-fc2d2bba00bc","position":3,"url":"https:\/\/pageloot.com\/blog\/how-to-improve-qr-code-readability\/#faq-question-fc2d2bba00bc","name":"T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng hi\u1ec7u \u1ee9ng chuy\u1ec3n m\u00e0u ho\u1eb7c \u0111\u1ed5 b\u00f3ng trong thi\u1ebft k\u1ebf m\u00e3 QR c\u1ee7a m\u00ecnh kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"It is best to avoid gradients and shadows because they introduce mid-tones that can confuse the scanning software. Scanners look for a binary difference between light and dark; gradients may create u005cu0022grayu005cu0022 areas that make the code unreadable. Stick to solid colors for the best results.","inLanguage":"vi"},"inLanguage":"vi"}]}},"_links":{"self":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/43969","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=43969"}],"version-history":[{"count":7,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/43969\/revisions"}],"predecessor-version":[{"id":52742,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/43969\/revisions\/52742"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/media\/50735"}],"wp:attachment":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/media?parent=43969"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/categories?post=43969"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/tags?post=43969"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}