{"id":3374,"date":"2021-10-20T16:57:53","date_gmt":"2021-10-20T09:57:53","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=3374"},"modified":"2021-10-22T18:08:42","modified_gmt":"2021-10-22T11:08:42","slug":"pixel-megapixel-la-gi-y-nghia-pixel-trong-man-hinh-thiet-ke","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/pixel-megapixel-la-gi-y-nghia-pixel-trong-man-hinh-thiet-ke\/","title":{"rendered":"Pixel, megapixel l\u00e0 g\u00ec \u2013 \u00fd ngh\u0129a pixel trong m\u00e0n h\u00ecnh, thi\u1ebft k\u1ebf"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Khi mua laptop, smartphone b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c nh\u00e2n vi\u00ean <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">t\u01b0 v\u1ea5n<\/a> nh\u1eafc \u0111\u1ebfn \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u1ee7a camera l\u00ean \u0111\u1ebfn 8 megapixel, 12 megapixel hay m\u00e0n h\u00ecnh \u0111\u1ed9 ph\u00e2n gi\u1ea3i 1440 x 2560 pixel. V\u1edbi nh\u1eefng ng\u01b0\u1eddi \u201cngo\u1ea1i \u0111\u1ea1o\u201d th\u1eadt kh\u00f3 \u0111\u1ec3 h\u1ecd hi\u1ec3u h\u1ebft \u0111\u01b0\u1ee3c c\u00e1c kh\u00e1i ni\u1ec7m pixel l\u00e0 g\u00ec? megapixel l\u00e0 g\u00ec? c\u00e1ch quy \u0111\u1ed5i 1 pixel?\u2026V\u1eady n\u00ean, trong b\u00e0i vi\u1ebft n\u00e0y ch\u00fang t\u00f4i s\u1ebd gi\u1ea3i \u0111\u00e1p m\u1ecdi th\u1eafc m\u1eafc c\u1ee7a b\u1ea1n li\u00ean quan \u0111\u1ebfn v\u1ea5n \u0111\u1ec1 n\u00e0y, d\u01b0\u1edbi \u0111\u00e2y l\u00e0 th\u00f4ng tin chi ti\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pixel l\u00e0 g\u00ec? Megapixel l\u00e0 g\u00ec? C\u00e1c kh\u00e1i ni\u1ec7m li\u00ean quan<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pixels l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pixel la gi? v\u00e0 px l\u00e0 g\u00ec? \u0110i\u1ec3m \u1ea3nh l\u00e0 g\u00ec? th\u1ef1c ch\u1ea5t l\u00e0 3 c\u00e2u h\u1ecfi gi\u1ed1ng nhau, c\u00f9ng \u0111\u01b0\u1ee3c h\u1ecfi v\u1ec1 kh\u00e1i ni\u1ec7m c\u1ee7a pixels. Pixel l\u00e0 t\u00ean vi\u1ebft t\u1eaft c\u1ee7a t\u1eeb \u201cpicture element\u201d trong ti\u1ebfng Anh; \u0111\u00e2y l\u00e0 \u0111i\u1ec3m v\u1eadt l\u00fd trong h\u00ecnh \u1ea3nh raster, bitmap ho\u1eb7c m\u1ed9t kh\u1ed1i m\u00e0u nh\u1ecf. M\u1ed7i pixel s\u1ebd c\u00f3 th\u00f4ng s\u1ed1 m\u00e0u kh\u00e1c nhau, \u0111\u00e2y l\u00e0 \u0111\u01a1n v\u1ecb c\u01a1 b\u1ea3n nh\u1ecf nh\u1ea5t \u0111\u1ec3 t\u1ea1o n\u00ean 1 t\u1ea5m \u1ea3nh k\u1ef9 thu\u1eadt s\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pixel \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb m\u00e1y qu\u00e9t, m\u00e1y \u1ea3nh k\u1ef9 thu\u1eadt s\u1ed1 ho\u1eb7c ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng nh\u01b0 Photoshop. Trong photoshop, pixel t\u1ed3n t\u1ea1i \u1edf d\u1ea1ng h\u00ecnh ch\u1eef nh\u1eadt nh\u1ecf mang nhi\u1ec1u m\u00e0u s\u1eafc kh\u00e1c nhau. C\u00e1c pel \u0111\u01b0\u1ee3c x\u1ebfp c\u1ea1nh nhau s\u1ebd ch\u1ee9a c\u00e1c th\u00f4ng s\u1ed1 m\u00e0u nh\u1ea5t \u0111\u1ecbnh, khi gh\u00e9p l\u1ea1i b\u1ea1n s\u1ebd th\u1ea5y m\u1ed9t b\u1ee9c \u1ea3nh ho\u00e0n ch\u1ec9nh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Megapixel l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Megapixels l\u00e0 g\u00ec? l\u00e0 \u0111\u01a1n v\u1ecb \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111o \u0111\u1ed9 ph\u00e2n gi\u1ea3i \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb s\u1ed1 \u0111i\u1ec3m \u1ea3nh hi\u1ec3n th\u1ecb tr\u00ean h\u00ecnh \u1ea3nh thu nh\u1ecf c\u1ee7a camera. Gi\u00e1 tr\u1ecb c\u1ee7a megapixel \u0111\u01b0\u1ee3c t\u00ednh b\u1eb1ng c\u00e1ch l\u1ea5y \u0111\u1ed9 r\u1ed9ng nh\u00e2n v\u1edbi chi\u1ec1u cao c\u1ee7a b\u1ee9c \u1ea3nh. N\u00f3i c\u00e1ch kh\u00e1c, megapixel l\u00e0 t\u1eadp h\u1ee3p c\u1ee7a h\u00e0ng tri\u1ec7u pixel tr\u00ean m\u1ed9t b\u1ee9c \u1ea3nh.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 ph\u00e2n gi\u1ea3i megapixel l\u00e0 th\u00f4ng s\u1ed1 bi\u1ec3u th\u1ecb ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a h\u00ecnh \u1ea3nh m\u00e0 camera thu \u0111\u01b0\u1ee3c. Camera c\u00f3 \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u00e0ng cao th\u00ec b\u1ee9c \u1ea3nh c\u1ee7a b\u1ea1n s\u1ebd tr\u1edf n\u00ean n\u1eb7ng h\u01a1n, b\u1ea1n c\u00f3 th\u1ec3 zoom b\u1ee9c h\u00ecnh m\u00e0 kh\u00f4ng b\u1ecb m\u1edd hay m\u1ea5t chi ti\u1ebft.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eadt \u0111\u1ed9 \u0111i\u1ec3m \u1ea3nh l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eadt \u0111\u1ed9 \u0111i\u1ec3m \u1ea3nh l\u00e0 ph\u00e9p \u0111o m\u1eadt \u0111\u1ed9 \u0111i\u1ec3m \u1ea3nh c\u1ee7a h\u00ecnh \u1ea3nh tr\u00ean c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed nh\u01b0 m\u00e0n h\u00ecnh m\u00e1y t\u00ednh, thi\u1ebft b\u1ecb \u1ea3nh k\u1ef9 thu\u1eadt s\u1ed1. M\u1eadt \u0111\u1ed9 h\u01b0\u1edbng ngang v\u00e0 d\u1ecdc \u0111\u1ec1u gi\u1ed1ng nhau tr\u00ean h\u1ea7u h\u1ebft c\u00e1c thi\u1ebft b\u1ecb c\u00f3 \u0111i\u1ec3m \u1ea3nh vu\u00f4ng nh\u01b0ng s\u1ebd kh\u00e1c v\u1edbi c\u00e1c thi\u1ebft b\u1ecb c\u00f3 \u0111i\u1ec3m kh\u00f4ng ph\u1ea3i l\u00e0 h\u00ecnh vu\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1eadt \u0111\u1ed9 c\u1ee7a \u0111i\u1ec3m \u1ea3nh s\u1ebd kh\u00f4ng gi\u1ed1ng v\u1edbi \u0111\u1ed9 ph\u00e2n gi\u1ea3i, tr\u01b0\u1edbc \u0111\u00e2y n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng d\u00f9ng \u0111\u1ec3 m\u00f4 t\u1ea3 s\u1ed1 l\u01b0\u1ee3ng chi ti\u1ebft tr\u00ean b\u1ec1 m\u1eb7t v\u1eadt l\u00fd c\u1ee7a thi\u1ebft b\u1ecb, nh\u01b0ng sau n\u00e0y \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u00f2n m\u00f4 t\u1ea3 th\u00f4ng tin s\u1ed1 l\u01b0\u1ee3ng \u0111i\u1ec3m \u1ea3nh m\u00e0 kh\u00f4ng ph\u00e2n bi\u1ec7t quy m\u00f4 c\u1ee7a n\u00f3.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1 megapixel b\u1eb1ng bao nhi\u00eau pixel?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Megapixel th\u01b0\u1eddng \u0111\u01b0\u1ee3c quy \u0111\u1ed5i sang \u0111\u01a1n v\u1ecb l\u00e0 pixel ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i. V\u1eady 1 megapixel b\u1eb1ng bao nhi\u00eau pixel? \u0110\u00e2y l\u00e0 \u0111\u01a1n v\u1ecb ph\u00e2n gi\u1ea3i c\u1ee7a thi\u1ebft b\u1ecb quang (nh\u01b0 l\u00e0 s\u1ed1 \u0111i\u1ec3m trong \u1ea3nh) . Theo \u0111\u00f3, 1 megapixel s\u1ebd b\u1eb1ng 1.000.000 pixel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ngo\u00e0i ra, ng\u01b0\u1eddi d\u00f9ng c\u00f2n quy \u0111\u1ed5i pixel h\u1ecd th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u1ed5i sang centimet; 1 pixel =2,54 cm \/ 96 = 0.026458333 cm. Nh\u01b0ng c\u00f3 l\u1ebd c\u00e1ch quy \u0111\u1ed5i t\u1eeb megapixel sang pixel \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u h\u01a1n c\u1ea3. Gi\u1ea3 d\u1ee5, b\u1ee9c \u1ea3nh c\u00f3 1.945.600 pixel ngh\u0129a l\u00e0 n\u00f3 x\u1ea5p x\u1ec9 2 megapixel ho\u1eb7c b\u1ee9c \u1ea3nh c\u00f3 1280 pixel chi\u1ec1u r\u1ed9ng v\u00e0 1024 pixel tr\u00ean chi\u1ec1u cao th\u00ec b\u1ee9c \u1ea3nh \u0111\u00f3 c\u00f3 1.310.720 pixel hay 1.3 megapixel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u01a1n v\u1ecb pixel \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u nhi\u1ebfp \u1ea3nh gia ch\u1ecdn l\u1ef1a khi ch\u1ec9nh \u1ea3nh tr\u00ean photoshop. \u0110\u1ec3 \u0111\u1ed5i \u0111\u01a1n v\u1ecb trong photoshop, b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n theo 2 c\u00e1ch sau:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch 1: \u0110\u1ea7u ti\u00ean, b\u1ea1n m\u1edf photoshop v\u00e0 ch\u1ecdn menu View, ch\u1ecdn Rules r\u1ed3i click chu\u1ed9t ph\u1ea3i v\u00e0o thanh th\u01b0\u1edbc. Ti\u1ebfp \u0111\u1ebfn l\u1ef1a ch\u1ecdn \u0111\u01a1n v\u1ecb \u1edf \u0111\u00e2y c\u00f3 c\u00e1c l\u1ef1a ch\u1ecdn: Pixels, Inches, Centimeters(cm) Milimeters Point Picas Percent<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch 2: V\u00e0o menu Edit \u2192 ch\u1ecdn Preferences \u2192 General \u0111\u1ec3 thi\u1ebft l\u1eadp ho\u1eb7c nh\u1ea5n ch\u1ecdn t\u1ed5 h\u1ee3p ph\u00edm t\u1eaft: Ctrl + K. Sau \u0111\u00f3, ch\u1ecdn Menu Units &amp; Rules v\u00e0 \u0111i\u1ec1u ch\u1ec9nh c\u00e1c th\u00f4ng s\u1ed1 c\u1ea7n thi\u1ebft Pixels, Inches l\u00e0 \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00dd ngh\u0129a pixel trong m\u00e0n h\u00ecnh, <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">thi\u1ebft k\u1ebf<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pixels gi\u1eef vai tr\u00f2 quan trong m\u00e0n h\u00ecnh, <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">thi\u1ebft k\u1ebf<\/a> c\u0169ng nh\u01b0 in \u1ea5n, c\u1ee5 th\u1ec3:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dung l\u01b0\u1ee3ng \u1ea3nh s\u1ebd t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi pixel, l\u01b0\u1ee3ng pixel c\u00e0ng l\u1edbn th\u00ec dung l\u01b0\u1ee3ng \u1ea3nh c\u00e0ng l\u1edbn v\u00e0 ng\u01b0\u1ee3c l\u1ea1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">K\u00edch th\u01b0\u1edbc \u1ea3nh s\u1ebd hi\u1ec3n th\u1ecb tr\u00ean m\u00e0n h\u00ecnh s\u1ebd t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi pixel, l\u01b0\u1ee3ng pixel c\u00e0ng l\u1edbn th\u00ec k\u00edch th\u01b0\u1edbc hi\u1ec3n th\u1ecb tr\u00ean m\u00e0n h\u00ecnh c\u00e0ng l\u1edbn. N\u1ebfu nh\u01b0 l\u01b0\u1ee3ng pixel c\u00e0ng nh\u1ecf th\u00ec k\u00edch th\u01b0\u1edbc hi\u1ec3n th\u1ecb tr\u00ean m\u00e0n h\u00ecnh c\u00e0ng nh\u1ecf.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ch\u1ea5t l\u01b0\u1ee3ng h\u00ecnh \u1ea3nh s\u1ebd kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o dung l\u01b0\u1ee3ng pixel; \u1ea3nh c\u00f3 nhi\u1ec1u pixel kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 ch\u00fang s\u1ebd lu\u00f4n s\u1eafc n\u00e9t, ch\u1ea5t l\u01b0\u1ee3ng m\u00e0 c\u00f2n ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec1u y\u1ebfu t\u1ed1 kh\u00e1c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong l\u0129nh v\u1ef1c in \u1ea5n, ng\u01b0\u1eddi d\u00f9ng c\u1ea7n d\u1ef1a v\u00e0o l\u01b0\u1ee3ng pixel \u0111\u1ec3 l\u1ef1a ch\u1ecdn k\u00edch th\u01b0\u1edbc b\u1ea3n in ph\u00f9 h\u1ee3p \u0111\u1ec3 \u1ea3nh sau khi \u0111\u01b0\u1ee3c in kh\u00f4ng b\u1ecb m\u1edd. V\u00ed d\u1ee5 nh\u01b0 \u1ea3nh c\u00f3 k\u00edch th\u01b0\u1edbc pixel l\u1ea7n l\u01b0\u1ee3t l\u00e0 320 x 240 b\u1ea1n kh\u00f4ng th\u1ec3 in v\u1edbi k\u00edch th\u01b0\u1edbc l\u1edbn nh\u01b0 24\u2019\u2019 x 32\u2019\u2019 \u0111\u01b0\u1ee3c m\u00e0 c\u1ea7n in v\u1edbi k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1edbi nh\u1eefng th\u00f4ng tin trong b\u00e0i vi\u1ebft tr\u00ean \u0111\u00e2y Pixel, megapixel l\u00e0 g\u00ec \u2013 \u00fd ngh\u0129a pixel trong m\u00e0n h\u00ecnh, <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">thi\u1ebft k\u1ebf<\/a> mong r\u1eb1ng s\u1ebd \u0111em gi\u00fap \u00edch c\u00f3 th\u00eam nhi\u1ec1u ki\u1ebfn th\u1ee9c h\u1eefu \u00edch. M\u1ecdi \u00fd ki\u1ebfn \u0111\u00f3ng g\u00f3p \u0111\u1ec3 b\u00e0i vi\u1ebft tr\u1edf n\u00ean \u0111\u1ea7y \u0111\u1ee7 h\u01a1n qu\u00fd b\u1ea1n \u0111\u1ecdc h\u00e3y comment ph\u00eda d\u01b0\u1edbi b\u00e0i vi\u1ebft, Vietlearn.org s\u1ebd t\u1ed5ng h\u1ee3p v\u00e0 \u0111em t\u1edbi b\u1ea1n nh\u1eefng th\u00f4ng tin h\u1eefu \u0111\u1ea7y \u0111\u1ee7 nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Khi mua laptop, smartphone b\u1ea1n s\u1ebd \u0111\u01b0\u1ee3c nh\u00e2n vi\u00ean t\u01b0 v\u1ea5n nh\u1eafc \u0111\u1ebfn \u0111\u1ed9 ph\u00e2n gi\u1ea3i c\u1ee7a camera l\u00ean \u0111\u1ebfn 8 megapixel, 12 megapixel hay m\u00e0n h\u00ecnh \u0111\u1ed9 ph\u00e2n gi\u1ea3i 1440 x 2560 pixel. V\u1edbi nh\u1eefng ng\u01b0\u1eddi \u201cngo\u1ea1i \u0111\u1ea1o\u201d th\u1eadt kh\u00f3 \u0111\u1ec3 h\u1ecd hi\u1ec3u h\u1ebft \u0111\u01b0\u1ee3c c\u00e1c kh\u00e1i ni\u1ec7m [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[13],"tags":[],"class_list":["post-3374","post","type-post","status-publish","format-standard","hentry","category-tin-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/3374","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=3374"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/3374\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=3374"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=3374"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=3374"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}