{"id":480545,"date":"2025-08-07T21:42:58","date_gmt":"2025-08-07T14:42:58","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=480545"},"modified":"2025-08-07T21:42:58","modified_gmt":"2025-08-07T14:42:58","slug":"megapixel-la-gi","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/megapixel-la-gi\/","title":{"rendered":"Megapixel l\u00e0 g\u00ec? V\u00ec sao quan tr\u1ecdng? Megapixel c\u00f3 quy\u1ebft \u0111\u1ecbnh ch\u1ea5t l\u01b0\u1ee3ng camera?"},"content":{"rendered":"

Megapixel l\u00e0 g\u00ec?<\/b> \u0110\u00e2y l\u00e0 c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p khi l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb c\u00f3 camera nh\u01b0 \u0111i\u1ec7n tho\u1ea1i hay m\u00e1y \u1ea3nh. Ch\u1ec9 s\u1ed1 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 chi ti\u1ebft c\u1ee7a h\u00ecnh \u1ea3nh. Tuy nhi\u00ean, megapixel c\u00f3 th\u1ef1c s\u1ef1 quy\u1ebft \u0111\u1ecbnh ch\u1ea5t l\u01b0\u1ee3ng camera hay kh\u00f4ng? V\u00e0 v\u00ec sao n\u00f3 l\u1ea1i quan tr\u1ecdng? H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u r\u00f5 h\u01a1n \u0111\u1ec3 tr\u00e1nh nh\u1eefng hi\u1ec3u l\u1ea7m ph\u1ed5 bi\u1ebfn khi ch\u1ecdn mua thi\u1ebft b\u1ecb ch\u1ee5p \u1ea3nh.<\/span><\/p>\n

Megapixel l\u00e0 g\u00ec? V\u00ec sao quan tr\u1ecdng?<\/b><\/h2>\n

Hi\u1ec3u m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, megapixel l\u00e0 \u0111\u01a1n v\u1ecb th\u1ec3 hi\u1ec7n s\u1ed1 l\u01b0\u1ee3ng \u0111i\u1ec3m \u1ea3nh (pixel) trong m\u1ed7i b\u1ee9c \u1ea3nh k\u1ef9 thu\u1eadt s\u1ed1. T\u1eeb \u201cmega\u201d mang ngh\u0129a l\u00e0 \u201cm\u1ed9t tri\u1ec7u\u201d, do \u0111\u00f3 1 megapixel t\u01b0\u01a1ng \u1ee9ng v\u1edbi 1 tri\u1ec7u \u0111i\u1ec3m \u1ea3nh. V\u00ed d\u1ee5, m\u1ed9t b\u1ee9c \u1ea3nh c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i 4000 x 3000 pixel s\u1ebd ch\u1ee9a t\u1ed5ng c\u1ed9ng 12 tri\u1ec7u \u0111i\u1ec3m \u1ea3nh, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi 12 megapixel.<\/span><\/p>\n

\"\"<\/picture><\/p>\n

S\u1ed1 l\u01b0\u1ee3ng megapixel c\u00e0ng cao th\u00ec \u1ea3nh ch\u1ee5p c\u00e0ng c\u00f3 \u0111\u1ed9 chi ti\u1ebft t\u1ed1t, cho ph\u00e9p ph\u00f3ng to ho\u1eb7c c\u1eaft c\u00fap m\u00e0 v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c ch\u1ea5t l\u01b0\u1ee3ng h\u00ecnh \u1ea3nh r\u00f5 n\u00e9t. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong nhi\u1ebfp \u1ea3nh chuy\u00ean nghi\u1ec7p, in \u1ea5n kh\u1ed5 l\u1edbn ho\u1eb7c khi c\u1ea7n x\u1eed l\u00fd h\u1eadu k\u1ef3. \u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng ph\u1ed5 th\u00f4ng, s\u1ed1 megapixel cao c\u0169ng mang l\u1ea1i l\u1ee3i th\u1ebf trong vi\u1ec7c l\u01b0u gi\u1eef kho\u1ea3nh kh\u1eafc v\u1edbi \u0111\u1ed9 s\u1eafc n\u00e9t cao, \u0111\u1eb7c bi\u1ec7t l\u00e0 khi xem l\u1ea1i tr\u00ean c\u00e1c thi\u1ebft b\u1ecb m\u00e0n h\u00ecnh l\u1edbn ho\u1eb7c zoom \u1ea3nh \u0111\u1ec3 quan s\u00e1t chi ti\u1ebft.<\/span><\/p>\n

C\u00e1ch t\u00ednh Megapixel<\/b><\/h2>\n

\u0110\u1ec3 x\u00e1c \u0111\u1ecbnh s\u1ed1 megapixel, b\u1ea1n ch\u1ec9 c\u1ea7n l\u1ea5y s\u1ed1 \u0111i\u1ec3m \u1ea3nh theo chi\u1ec1u ngang nh\u00e2n v\u1edbi s\u1ed1 \u0111i\u1ec3m \u1ea3nh theo chi\u1ec1u d\u1ecdc, sau \u0111\u00f3 chia k\u1ebft qu\u1ea3 cho m\u1ed9t tri\u1ec7u (1.000.000). \u0110\u00e2y l\u00e0 c\u00f4ng th\u1ee9c \u0111\u01a1n gi\u1ea3n nh\u01b0ng r\u1ea5t hi\u1ec7u qu\u1ea3 \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u1ed9 ph\u00e2n gi\u1ea3i \u1ea3nh.<\/span><\/p>\n

V\u00ed d\u1ee5, n\u1ebfu m\u1ed9t b\u1ee9c \u1ea3nh c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i 1000 x 1000, th\u00ec t\u1ed5ng s\u1ed1 \u0111i\u1ec3m \u1ea3nh l\u00e0 1.000.000, t\u1ee9c l\u00e0 b\u1eb1ng 1 megapixel. T\u01b0\u01a1ng t\u1ef1, \u0111\u1ed9 ph\u00e2n gi\u1ea3i 1920 x 1080 cho ra 2.073.600 \u0111i\u1ec3m \u1ea3nh, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng g\u1ea7n 2 megapixel. V\u1edbi \u0111\u1ed9 ph\u00e2n gi\u1ea3i 3840 x 2160 (th\u01b0\u1eddng g\u1ecdi l\u00e0 chu\u1ea9n 4K), t\u1ed5ng s\u1ed1 \u0111i\u1ec3m \u1ea3nh l\u00ean t\u1edbi h\u01a1n 8 tri\u1ec7u, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng tr\u00ean 8 megapixel.<\/span><\/p>\n

\"megapixel-la-gi-2\"<\/picture><\/p>\n

Nh\u01b0 v\u1eady, \u1ea3nh c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u00e0ng cao th\u00ec t\u1ed5ng s\u1ed1 \u0111i\u1ec3m \u1ea3nh c\u00e0ng l\u1edbn, k\u00e9o theo s\u1ed1 megapixel t\u0103ng theo. \u0110i\u1ec1u n\u00e0y \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c \u1ea3nh s\u1ebd ch\u1ee9a nhi\u1ec1u chi ti\u1ebft h\u01a1n, cho ph\u00e9p b\u1ea1n zoom, crop ho\u1eb7c in ra \u1edf kh\u1ed5 l\u1edbn m\u00e0 v\u1eabn \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 s\u1eafc n\u00e9t. Vi\u1ec7c hi\u1ec3u c\u00e1ch t\u00ednh n\u00e0y gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng so s\u00e1nh gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb ch\u1ee5p \u1ea3nh nh\u01b0 \u0111i\u1ec7n tho\u1ea1i, m\u00e1y \u1ea3nh k\u1ef9 thu\u1eadt s\u1ed1 ho\u1eb7c camera gi\u00e1m s\u00e1t.<\/span><\/p>\n

Ngo\u00e0i ra, vi\u1ec7c bi\u1ebft r\u00f5 ch\u1ec9 s\u1ed1 megapixel c\u0169ng h\u1ed7 tr\u1ee3 ng\u01b0\u1eddi d\u00f9ng x\u00e1c \u0111\u1ecbnh \u1ea3nh c\u00f3 ph\u00f9 h\u1ee3p v\u1edbi m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng hay kh\u00f4ng. V\u00ed d\u1ee5, n\u1ebfu ch\u1ec9 d\u00f9ng \u0111\u1ec3 \u0111\u0103ng m\u1ea1ng x\u00e3 h\u1ed9i ho\u1eb7c xem tr\u00ean \u0111i\u1ec7n tho\u1ea1i, h\u00ecnh \u1ea3nh c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i th\u1ea5p v\u1eabn c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng t\u1ed1t. Tuy nhi\u00ean, khi c\u1ea7n in poster, bi\u1ec3n qu\u1ea3ng c\u00e1o, ho\u1eb7c ph\u00f3ng \u0111\u1ea1i \u1ea3nh, ch\u1ec9 s\u1ed1 megapixel cao s\u1ebd gi\u00fap duy tr\u00ec \u0111\u1ed9 r\u00f5 n\u00e9t, tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng v\u1ee1 h\u00ecnh.<\/span><\/p>\n

Megapixel c\u00f3 quy\u1ebft \u0111\u1ecbnh ch\u1ea5t l\u01b0\u1ee3ng camera?<\/b><\/h2>\n

Khi l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb ch\u1ee5p \u1ea3nh, nhi\u1ec1u ng\u01b0\u1eddi th\u01b0\u1eddng ch\u00fa \u00fd \u0111\u1ebfn th\u00f4ng s\u1ed1 <\/span>megapixel l\u00e0 g\u00ec<\/b> v\u1edbi suy ngh\u0129 r\u1eb1ng con s\u1ed1 c\u00e0ng cao th\u00ec ch\u1ea5t l\u01b0\u1ee3ng \u1ea3nh c\u00e0ng t\u1ed1t. Tuy nhi\u00ean, \u0111i\u1ec1u n\u00e0y kh\u00f4ng ho\u00e0n to\u00e0n ch\u00ednh x\u00e1c. Megapixel ch\u1ec9 ph\u1ea3n \u00e1nh s\u1ed1 l\u01b0\u1ee3ng \u0111i\u1ec3m \u1ea3nh m\u00e0 c\u1ea3m bi\u1ebfn c\u00f3 th\u1ec3 ghi l\u1ea1i, t\u1ee9c l\u00e0 li\u00ean quan \u0111\u1ebfn \u0111\u1ed9 ph\u00e2n gi\u1ea3i, ch\u1ee9 kh\u00f4ng \u0111\u1ea1i di\u1ec7n cho to\u00e0n b\u1ed9 ch\u1ea5t l\u01b0\u1ee3ng h\u00ecnh \u1ea3nh.<\/span><\/p>\n

\"megapixel-la-gi-3\"<\/picture><\/p>\n

M\u1ed9t camera s\u1edf h\u1eefu 12 megapixel c\u00f3 th\u1ec3 t\u1ea1o ra \u1ea3nh v\u1edbi \u0111\u1ed9 ph\u00e2n gi\u1ea3i \u0111\u1ee7 l\u1edbn cho nhi\u1ec1u nhu c\u1ea7u th\u00f4ng th\u01b0\u1eddng nh\u01b0 chia s\u1ebb l\u00ean m\u1ea1ng x\u00e3 h\u1ed9i, in k\u00edch th\u01b0\u1edbc trung b\u00ecnh ho\u1eb7c ch\u1ec9nh s\u1eeda nh\u1eb9. Trong khi \u0111\u00f3, m\u1ed9t thi\u1ebft b\u1ecb c\u00f3 th\u00f4ng s\u1ed1 l\u00ean \u0111\u1ebfn 64 megapixel v\u1eabn c\u00f3 th\u1ec3 cho ra h\u00ecnh \u1ea3nh k\u00e9m s\u1eafc n\u1ebfu c\u1ea3m bi\u1ebfn nh\u1ecf, \u1ed1ng k\u00ednh ch\u1ea5t l\u01b0\u1ee3ng th\u1ea5p ho\u1eb7c ph\u1ea7n m\u1ec1m x\u1eed l\u00fd \u1ea3nh kh\u00f4ng hi\u1ec7u qu\u1ea3. Ng\u01b0\u1ee3c l\u1ea1i, camera v\u1edbi s\u1ed1 megapixel v\u1eeba ph\u1ea3i nh\u01b0ng \u0111\u01b0\u1ee3c trang b\u1ecb c\u1ea3m bi\u1ebfn l\u1edbn, kh\u1ea9u \u0111\u1ed9 r\u1ed9ng, x\u1eed l\u00fd \u00e1nh s\u00e1ng t\u1ed1t c\u00f9ng thu\u1eadt to\u00e1n t\u1ed1i \u01b0u s\u1ebd mang l\u1ea1i k\u1ebft qu\u1ea3 v\u01b0\u1ee3t tr\u1ed9i trong nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n.<\/span><\/p>\n

Ch\u1ea5t l\u01b0\u1ee3ng \u1ea3nh c\u00f2n ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1 kh\u00e1c nh\u01b0 kh\u1ea3 n\u0103ng l\u1ea5y n\u00e9t, ch\u1ed1ng rung, \u0111\u1ed9 m\u1edf \u1ed1ng k\u00ednh, k\u00edch th\u01b0\u1edbc c\u1ea3m bi\u1ebfn, thu\u1eadt to\u00e1n x\u1eed l\u00fd, d\u1ea3i t\u01b0\u01a1ng ph\u1ea3n \u0111\u1ed9ng (HDR), kh\u1ea3 n\u0103ng ch\u1ee5p thi\u1ebfu s\u00e1ng, v\u00e0 m\u00e0u s\u1eafc \u0111\u01b0\u1ee3c t\u00e1i hi\u1ec7n nh\u01b0 th\u1ebf n\u00e0o. Nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0y k\u1ebft h\u1ee3p m\u1edbi t\u1ea1o n\u00ean s\u1ef1 kh\u00e1c bi\u1ec7t r\u00f5 r\u1ec7t gi\u1eefa m\u1ed9t b\u1ee9c \u1ea3nh \u0111\u1eb9p v\u00e0 m\u1ed9t b\u1ee9c \u1ea3nh ch\u1ec9 \u1edf m\u1ee9c trung b\u00ecnh, d\u00f9 c\u00f3 c\u00f9ng \u0111\u1ed9 ph\u00e2n gi\u1ea3i.<\/span><\/p>\n

V\u00ec sao camera nhi\u1ec1u megapixel v\u1eabn ch\u1ee5p \u1ea3nh k\u00e9m?<\/b><\/h2>\n

Kh\u00f4ng \u00edt ng\u01b0\u1eddi l\u1ea7m t\u01b0\u1edfng r\u1eb1ng c\u00e0ng nhi\u1ec1u megapixel th\u00ec \u1ea3nh ch\u1ee5p s\u1ebd c\u00e0ng r\u00f5 n\u00e9t v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng. Tuy nhi\u00ean, tr\u00ean th\u1ef1c t\u1ebf, th\u00f4ng s\u1ed1<\/span> megapixel l\u00e0 g\u00ec <\/b>v\u00e0 n\u00f3 ch\u1ec9 ph\u1ea3n \u00e1nh t\u1ed5ng s\u1ed1 \u0111i\u1ec3m \u1ea3nh m\u00e0 c\u1ea3m bi\u1ebfn c\u00f3 th\u1ec3 ghi l\u1ea1i, ch\u1ee9 kh\u00f4ng tr\u1ef1c ti\u1ebfp \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng h\u00ecnh \u1ea3nh. \u0110\u1ec3 hi\u1ec3u t\u1ea1i sao camera s\u1edf h\u1eefu \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao nh\u01b0ng k\u1ebft qu\u1ea3 v\u1eabn k\u00e9m, c\u1ea7n nh\u00ecn s\u00e2u v\u00e0o c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng b\u00ean trong thi\u1ebft b\u1ecb ch\u1ee5p \u1ea3nh.<\/span><\/p>\n

M\u1ed9t b\u1ee9c \u1ea3nh k\u1ef9 thu\u1eadt s\u1ed1 \u0111\u01b0\u1ee3c t\u1ea1o ra khi \u00e1nh s\u00e1ng \u0111i qua \u1ed1ng k\u00ednh, l\u1ecdc qua c\u00e1c l\u1edbp m\u00e0u c\u01a1 b\u1ea3n nh\u01b0 \u0111\u1ecf, xanh l\u00e1 v\u00e0 xanh d\u01b0\u01a1ng, r\u1ed3i \u0111\u1ebfn b\u1ec1 m\u1eb7t c\u1ea3m bi\u1ebfn. T\u1ea1i \u0111\u00e2y, m\u1ed7i \u0111i\u1ec3m \u1ea3nh s\u1ebd ghi nh\u1eadn c\u01b0\u1eddng \u0111\u1ed9 \u00e1nh s\u00e1ng t\u1eeb t\u1eebng k\u00eanh m\u00e0u, sau \u0111\u00f3 chuy\u1ec3n th\u00e0nh d\u1eef li\u1ec7u \u0111\u1ec3 t\u00e1i hi\u1ec7n l\u1ea1i h\u00ecnh \u1ea3nh. V\u1ea5n \u0111\u1ec1 b\u1eaft \u0111\u1ea7u ph\u00e1t sinh khi nh\u00e0 s\u1ea3n xu\u1ea5t \u01b0u ti\u00ean t\u0103ng s\u1ed1 l\u01b0\u1ee3ng megapixel m\u00e0 kh\u00f4ng \u0111\u1ed3ng th\u1eddi c\u1ea3i thi\u1ec7n c\u00e1c th\u00e0nh ph\u1ea7n c\u00f2n l\u1ea1i.<\/span><\/p>\n

\"megapixel-la-gi-4\"<\/picture><\/p>\n

N\u1ebfu c\u1ea3m bi\u1ebfn qu\u00e1 nh\u1ecf, vi\u1ec7c “nh\u1ed3i” nhi\u1ec1u \u0111i\u1ec3m \u1ea3nh v\u00e0o m\u1ed9t kh\u00f4ng gian h\u1eb9p s\u1ebd khi\u1ebfn t\u1eebng pixel c\u00f3 di\u1ec7n t\u00edch ti\u1ebfp nh\u1eadn \u00e1nh s\u00e1ng r\u1ea5t h\u1ea1n ch\u1ebf. H\u1ec7 qu\u1ea3 l\u00e0 \u1ea3nh d\u1ec5 b\u1ecb nhi\u1ec5u, m\u1edd ho\u1eb7c m\u1ea5t chi ti\u1ebft, \u0111\u1eb7c bi\u1ec7t trong m\u00f4i tr\u01b0\u1eddng thi\u1ebfu s\u00e1ng. Ngo\u00e0i ra, ch\u1ea5t l\u01b0\u1ee3ng \u1ed1ng k\u00ednh c\u0169ng \u0111\u00f3ng vai tr\u00f2 c\u1ef1c k\u1ef3 quan tr\u1ecdng.\u00a0<\/span><\/p>\n

Kh\u00f4ng d\u1eebng l\u1ea1i \u1edf ph\u1ea7n c\u1ee9ng, kh\u1ea3 n\u0103ng x\u1eed l\u00fd ph\u1ea7n m\u1ec1m c\u0169ng c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3. N\u1ebfu thu\u1eadt to\u00e1n ph\u00e2n t\u00edch m\u00e0u s\u1eafc kh\u00f4ng ch\u00ednh x\u00e1c ho\u1eb7c b\u1ed9 x\u1eed l\u00fd h\u00ecnh \u1ea3nh ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng hi\u1ec7u qu\u1ea3, \u1ea3nh th\u00e0nh ph\u1ea9m c\u00f3 th\u1ec3 sai l\u1ec7ch m\u00e0u, thi\u1ebfu ch\u00e2n th\u1ef1c ho\u1eb7c m\u1ea5t \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n.<\/span><\/p>\n

M\u1ed9t s\u1ed1 l\u01b0u \u00fd khi \u0111\u00e1nh gi\u00e1 camera: \u0110\u1eebng ch\u1ec9 nh\u00ecn v\u00e0o Megapixel!<\/b><\/h2>\n

Khi \u0111\u00e3 hi\u1ec3u r\u00f5 <\/span>megapixel l\u00e0 g\u00ec<\/b>, b\u1ea1n s\u1ebd nh\u1eadn ra r\u1eb1ng con s\u1ed1 megapixel ch\u1ee7 y\u1ebfu th\u1ec3 hi\u1ec7n \u0111\u1ed9 ph\u00e2n gi\u1ea3i \u1ea3nh, kh\u00f4ng ph\u1ea3n \u00e1nh to\u00e0n di\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng camera. V\u00e0 m\u1ed9t camera \u0111\u00e1ng tin c\u1eady c\u1ea7n c\u00f3 kh\u1ea3 n\u0103ng ch\u1ee5p \u1ea3nh r\u00f5 r\u00e0ng, s\u1eafc n\u00e9t ngay c\u1ea3 khi \u00e1nh s\u00e1ng xung quanh kh\u00f4ng l\u00fd t\u01b0\u1edfng. H\u00ecnh \u1ea3nh ph\u1ea3i gi\u1eef \u0111\u01b0\u1ee3c chi ti\u1ebft, h\u1ea1n ch\u1ebf nhi\u1ec5u v\u00e0 m\u00e0u s\u1eafc kh\u00f4ng b\u1ecb sai l\u1ec7ch.\u00a0<\/span><\/p>\n

Ti\u1ebfp theo l\u00e0 ch\u1ea5t l\u01b0\u1ee3ng \u1ed1ng k\u00ednh \u2013 m\u1ed9t th\u00e0nh ph\u1ea7n c\u1ef1c k\u1ef3 quan tr\u1ecdng nh\u01b0ng l\u1ea1i hay b\u1ecb ng\u01b0\u1eddi d\u00f9ng b\u1ecf qua. M\u1ed9t h\u1ec7 th\u1ed1ng \u1ed1ng k\u00ednh t\u1ed1t s\u1ebd \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 s\u1eafc n\u00e9t \u0111\u1ed3ng \u0111\u1ec1u tr\u00ean to\u00e0n khung h\u00ecnh, kh\u00f4ng b\u1ecb nh\u00f2e \u1edf r\u00eca, kh\u00f4ng xu\u1ea5t hi\u1ec7n m\u00e9o h\u00ecnh hay quang sai m\u00e0u. C\u00e1c h\u00e3ng m\u00e1y \u1ea3nh danh ti\u1ebfng \u0111\u1ec1u \u0111\u1ea7u t\u01b0 r\u1ea5t nhi\u1ec1u v\u00e0o h\u1ec7 th\u1ed1ng quang h\u1ecdc, b\u1edfi \u0111\u00e2y l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ec3 c\u1ea3m bi\u1ebfn ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3.<\/span><\/p>\n

\"megapixel-la-gi-5\"<\/picture><\/p>\n

B\u00ean c\u1ea1nh ph\u1ea7n c\u1ee9ng, ph\u1ea7n m\u1ec1m x\u1eed l\u00fd \u1ea3nh c\u0169ng g\u00f3p ph\u1ea7n kh\u00f4ng nh\u1ecf v\u00e0o ch\u1ea5t l\u01b0\u1ee3ng \u1ea3nh \u0111\u1ea7u ra. C\u00e1c c\u00f4ng ngh\u1ec7 hi\u1ec7n \u0111\u1ea1i nh\u01b0 AI nh\u1eadn di\u1ec7n c\u1ea3nh, HDR t\u0103ng c\u01b0\u1eddng v\u00f9ng s\u00e1ng \u2013 t\u1ed1i, hay ch\u1ed1ng rung quang h\u1ecdc (OIS) gi\u00fap \u1ea3nh \u1ed5n \u0111\u1ecbnh h\u01a1n khi ch\u1ee5p tay. Nh\u1eefng t\u00ednh n\u0103ng n\u00e0y h\u1ed7 tr\u1ee3 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 \u0111\u1ed9 r\u00f5 n\u00e9t, \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n v\u00e0 m\u00e0u s\u1eafc, ngay c\u1ea3 khi ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng c\u00f3 k\u1ef9 n\u0103ng ch\u1ee5p \u1ea3nh chuy\u00ean nghi\u1ec7p.<\/span><\/p>\n

Cu\u1ed1i c\u00f9ng, \u0111\u1eebng ch\u1ec9 d\u1ef1a v\u00e0o th\u00f4ng s\u1ed1 tr\u00ean gi\u1ea5y. Vi\u1ec7c tham kh\u1ea3o \u1ea3nh ch\u1ee5p th\u1ef1c t\u1ebf, xem c\u00e1c b\u00e0i \u0111\u00e1nh gi\u00e1 t\u1eeb chuy\u00ean gia ho\u1eb7c so s\u00e1nh gi\u1eefa nhi\u1ec1u thi\u1ebft b\u1ecb s\u1ebd gi\u00fap b\u1ea1n c\u00f3 c\u00e1i nh\u00ecn ch\u00ednh x\u00e1c h\u01a1n v\u1ec1 hi\u1ec7u qu\u1ea3 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a t\u1eebng camera trong \u0111i\u1ec1u ki\u1ec7n s\u1eed d\u1ee5ng th\u1ef1c t\u1ebf.<\/span><\/p>\n

Megapixel l\u00e0 g\u00ec v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u00edch th\u01b0\u1edbc \u1ea3nh th\u1ebf n\u00e0o?<\/b><\/h2>\n

Megapixel (MP) l\u00e0 \u0111\u01a1n v\u1ecb \u0111o s\u1ed1 l\u01b0\u1ee3ng \u0111i\u1ec3m \u1ea3nh (pixel) m\u00e0 m\u1ed9t c\u1ea3m bi\u1ebfn m\u00e1y \u1ea3nh c\u00f3 th\u1ec3 ghi l\u1ea1i. T\u1eeb \u201cmega\u201d mang ngh\u0129a \u201cm\u1ed9t tri\u1ec7u\u201d, do \u0111\u00f3, m\u1ed9t camera 12 megapixel c\u00f3 th\u1ec3 t\u1ea1o ra h\u00ecnh \u1ea3nh g\u1ed3m kho\u1ea3ng 12 tri\u1ec7u \u0111i\u1ec3m \u1ea3nh.<\/span><\/p>\n

\u0110\u1ed9 ph\u00e2n gi\u1ea3i c\u1ee7a m\u1ed9t b\u1ee9c \u1ea3nh \u2013 v\u00ed d\u1ee5 4000 x 3000 \u2013 ch\u00ednh l\u00e0 s\u1ed1 \u0111i\u1ec3m \u1ea3nh theo chi\u1ec1u ngang v\u00e0 chi\u1ec1u d\u1ecdc. Khi nh\u00e2n hai con s\u1ed1 n\u00e0y, b\u1ea1n s\u1ebd c\u00f3 t\u1ed5ng s\u1ed1 pixel, sau \u0111\u00f3 chia cho m\u1ed9t tri\u1ec7u \u0111\u1ec3 ra s\u1ed1 megapixel. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, \u1ea3nh s\u1ebd c\u00f3 12 tri\u1ec7u \u0111i\u1ec3m \u1ea3nh, t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi 12MP. Nh\u01b0 v\u1eady, megapixel c\u00e0ng cao th\u00ec t\u1ed5ng s\u1ed1 \u0111i\u1ec3m \u1ea3nh trong \u1ea3nh c\u0169ng c\u00e0ng l\u1edbn, k\u00e9o theo k\u00edch th\u01b0\u1edbc t\u1ec7p \u1ea3nh t\u0103ng l\u00ean \u0111\u00e1ng k\u1ec3.<\/span><\/p>\n

\"megapixel-la-gi-6\"<\/picture><\/p>\n

K\u00edch th\u01b0\u1edbc \u1ea3nh kh\u00f4ng ch\u1ec9 n\u00f3i v\u1ec1 dung l\u01b0\u1ee3ng (t\u00ednh b\u1eb1ng MB) m\u00e0 c\u00f2n bao g\u1ed3m k\u00edch th\u01b0\u1edbc hi\u1ec3n th\u1ecb ho\u1eb7c in \u1ea5n. M\u1ed9t b\u1ee9c \u1ea3nh c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i cao s\u1ebd c\u00f3 th\u1ec3 in ra kh\u1ed5 l\u1edbn h\u01a1n m\u00e0 v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1ed9 s\u1eafc n\u00e9t, kh\u00f4ng b\u1ecb m\u1edd, v\u1ee1 h\u1ea1t. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng v\u1edbi nhi\u1ebfp \u1ea3nh gia chuy\u00ean nghi\u1ec7p, nh\u00e0 thi\u1ebft k\u1ebf ho\u1eb7c b\u1ea5t k\u1ef3 ai c\u1ea7n ph\u00f3ng to \u1ea3nh \u0111\u1ec3 tr\u00ecnh b\u00e0y, in poster, l\u00e0m banner\u2026<\/span><\/p>\n

Tuy nhi\u00ean, k\u00edch th\u01b0\u1edbc l\u1edbn kh\u00f4ng lu\u00f4n \u0111\u1ed3ng ngh\u0129a v\u1edbi ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t. M\u1ed9t b\u1ee9c \u1ea3nh 64MP nh\u01b0ng b\u1ecb m\u1edd do l\u1ea5y n\u00e9t sai, c\u1ea3m bi\u1ebfn nh\u1ecf ho\u1eb7c x\u1eed l\u00fd \u00e1nh s\u00e1ng k\u00e9m v\u1eabn kh\u00f4ng th\u1ec3 so v\u1edbi \u1ea3nh 12MP \u0111\u01b0\u1ee3c ch\u1ee5p b\u1eb1ng thi\u1ebft b\u1ecb cao c\u1ea5p, c\u1ea3m bi\u1ebfn l\u1edbn, v\u00e0 \u1ed1ng k\u00ednh ch\u1ea5t l\u01b0\u1ee3ng. Ngo\u00e0i ra, dung l\u01b0\u1ee3ng \u1ea3nh c\u00e0ng l\u1edbn s\u1ebd chi\u1ebfm nhi\u1ec1u b\u1ed9 nh\u1edb h\u01a1n, kh\u00f3 chia s\u1ebb nhanh qua m\u1ea1ng x\u00e3 h\u1ed9i ho\u1eb7c \u1ee9ng d\u1ee5ng nh\u1eafn tin.<\/span><\/p>\n

Megapixel l\u00e0 g\u00ec v\u00e0 c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn in \u1ea5n v\u00e0 ch\u1ec9nh s\u1eeda hay kh\u00f4ng?<\/b><\/h2>\n

Khi n\u00f3i \u0111\u1ebfn vi\u1ec7c in \u1ea5n ho\u1eb7c ch\u1ec9nh s\u1eeda \u1ea3nh, nhi\u1ec1u ng\u01b0\u1eddi t\u1ef1 h\u1ecfi li\u1ec7u megapixel c\u00f3 th\u1eadt s\u1ef1 quan tr\u1ecdng. C\u00e2u tr\u1ea3 l\u1eddi l\u00e0 c\u00f3, nh\u01b0ng c\u1ea7n hi\u1ec3u \u0111\u00fang vai tr\u00f2 c\u1ee7a n\u00f3 trong t\u1eebng t\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3. Megapixel th\u1ec3 hi\u1ec7n s\u1ed1 l\u01b0\u1ee3ng \u0111i\u1ec3m \u1ea3nh c\u00f3 trong m\u1ed9t b\u1ee9c h\u00ecnh k\u1ef9 thu\u1eadt s\u1ed1. S\u1ed1 \u0111i\u1ec3m \u1ea3nh c\u00e0ng cao th\u00ec \u1ea3nh c\u00e0ng c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i l\u1edbn, \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c ch\u1ee9a nhi\u1ec1u chi ti\u1ebft h\u01a1n. \u0110\u00e2y l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng khi b\u1ea1n c\u1ea7n x\u1eed l\u00fd \u1ea3nh trong c\u00e1c ph\u1ea7n m\u1ec1m \u0111\u1ed3 h\u1ecda ho\u1eb7c in ra v\u1edbi k\u00edch th\u01b0\u1edbc l\u1edbn m\u00e0 v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1ed9 n\u00e9t.<\/span><\/p>\n

\"megapixel-la-gi-7\"<\/picture><\/p>\n

V\u00ed d\u1ee5, n\u1ebfu b\u1ea1n mu\u1ed1n in \u1ea3nh \u1edf k\u00edch th\u01b0\u1edbc kh\u1ed5 l\u1edbn nh\u01b0 A2 ho\u1eb7c A1, \u1ea3nh c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i th\u1ea5p (d\u01b0\u1edbi 5MP) s\u1ebd r\u1ea5t d\u1ec5 b\u1ecb m\u1edd, v\u1ee1 h\u00ecnh, nh\u1ea5t l\u00e0 khi ng\u01b0\u1eddi xem \u0111\u1ee9ng g\u1ea7n. Trong khi \u0111\u00f3, \u1ea3nh t\u1eeb camera 20MP tr\u1edf l\u00ean s\u1ebd cung c\u1ea5p \u0111\u1ee7 s\u1ed1 \u0111i\u1ec3m \u1ea3nh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng in s\u1eafc n\u00e9t, m\u1ecbn m\u00e0ng. V\u00ec v\u1eady, \u0111\u1ed1i v\u1edbi m\u1ee5c \u0111\u00edch in poster, t\u00e0i li\u1ec7u qu\u1ea3ng c\u00e1o, tranh treo t\u01b0\u1eddng\u2026, s\u1ed1 megapixel cao l\u00e0 m\u1ed9t l\u1ee3i th\u1ebf r\u00f5 r\u1ec7t.<\/span><\/p>\n

V\u1ec1 m\u1eb7t ch\u1ec9nh s\u1eeda, \u1ea3nh c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i l\u1edbn c\u0169ng mang l\u1ea1i nhi\u1ec1u kh\u00f4ng gian s\u00e1ng t\u1ea1o h\u01a1n. Khi ch\u1ec9nh s\u1eeda tr\u00ean c\u00e1c ph\u1ea7n m\u1ec1m nh\u01b0 Photoshop ho\u1eb7c Lightroom, \u1ea3nh nhi\u1ec1u megapixel cho ph\u00e9p b\u1ea1n zoom s\u00e2u, c\u1eaft (crop), \u0111i\u1ec1u ch\u1ec9nh v\u00f9ng nh\u1ecf m\u00e0 kh\u00f4ng l\u00e0m gi\u1ea3m ch\u1ea5t l\u01b0\u1ee3ng t\u1ed5ng th\u1ec3. \u0110\u1eb7c bi\u1ec7t, trong thi\u1ebft k\u1ebf chuy\u00ean nghi\u1ec7p, khi c\u1ea7n t\u00e1ch ch\u1ee7 th\u1ec3, ch\u00e8n n\u1ec1n m\u1edbi, hay x\u1eed l\u00fd chi ti\u1ebft ph\u1ee9c t\u1ea1p, \u1ea3nh s\u1eafc n\u00e9t s\u1ebd d\u1ec5 thao t\u00e1c h\u01a1n r\u1ea5t nhi\u1ec1u.<\/span><\/p>\n

K\u1ebft lu\u1eadn<\/b><\/h2>\n

Qua nh\u1eefng ph\u00e2n t\u00edch tr\u00ean, c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng vi\u1ec7c hi\u1ec3u r\u00f5<\/span> megapixel l\u00e0 g\u00ec<\/b> \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c l\u1ef1a ch\u1ecdn v\u00e0 \u0111\u00e1nh gi\u00e1 thi\u1ebft b\u1ecb ch\u1ee5p \u1ea3nh ph\u00f9 h\u1ee3p. \u0110\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c tr\u1ea3i nghi\u1ec7m ch\u1ee5p h\u00ecnh t\u1ed1t, ng\u01b0\u1eddi d\u00f9ng c\u1ea7n c\u00e2n nh\u1eafc th\u00eam c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 c\u1ea3m bi\u1ebfn, \u1ed1ng k\u00ednh, thu\u1eadt to\u00e1n x\u1eed l\u00fd v\u00e0 \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng. Hi\u1ec3u \u0111\u00fang b\u1ea3n ch\u1ea5t c\u1ee7a th\u00f4ng s\u1ed1 n\u00e0y s\u1ebd gi\u00fap b\u1ea1n \u0111\u01b0a ra l\u1ef1a ch\u1ecdn th\u00f4ng minh h\u01a1n, thay v\u00ec ch\u1ec9 ch\u1ea1y theo con s\u1ed1 megapixel c\u00e0ng cao c\u00e0ng t\u1ed1t.<\/span><\/p>\n

Xem th\u00eam:<\/b><\/p>\n