\u1ea2nh Raw b\u1ea3n ch\u1ea5t kh\u00f4ng c\u00f3 m\u00e0u s\u1eafc – \u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e1ch n\u00f3i \u1ea9n d\u1ee5 m\u00e0 n\u00f3 l\u00e0 m\u1ed9t s\u1ef1 th\u1eadt v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt<\/p>\n\n\n\n
C\u1ea3m bi\u1ebfn m\u00e1y \u1ea3nh n\u00f3 ” m\u00f9 m\u00e0u”. Sensor \u0111\u01b0\u1ee3c c\u1ea7u t\u1ea1o t\u1eeb h\u00e0ng tri\u1ec7u t\u1ebf b\u00e0o quang \u0111i\u1ec7n nh\u1ecf x\u00edu. C\u00e1c t\u1ebf b\u00e0o quang \u0111i\u1ec7n n\u00e0y ch\u1ec9 c\u00f3 nhi\u1ec7m v\u1ee5 \u0111o c\u01b0\u1eddng \u0111\u1ed9 \u00e1nh s\u00e1ng (\u0111\u1ed9 s\u00e1ng\/t\u1ed1i). ch\u1ee9 ch\u00fang ho\u00e0n to\u00e0n kh\u00f4ng nh\u1eadn bi\u1ebft hay ghi l\u1ea1i \u0111\u01b0\u1ee3c m\u00e0u s\u1eafc. V\u1ec1 m\u1eb7t b\u1ea3n ch\u1ea5t khi ch\u1ee5p, m\u00e1y \u1ea3nh ch\u1ec9 ghi l\u1ea1i s\u1ef1 ch\u00eanh l\u1ec7ch m\u00e0u s\u1eafc c\u1ee7a c\u00e1c \u0111i\u1ec3m trong kh\u00f4ng gian.
Ch\u00fang ta nh\u00ecn th\u1ea5y m\u00e0u s\u1eafc l\u00e0 do c\u00e1c k\u1ef9 s\u01b0 \u0111\u00e3 ph\u1ee7 l\u00ean tr\u00ean b\u1ec1 m\u1eb7t c\u1ea3m bi\u1ebfn m\u1ed9t t\u1ea5m l\u01b0\u1edbi l\u1ecdc m\u00e0u k\u1ef9 thu\u1eadt s\u1ed1, ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 Bayer Filter. T\u1ea5m l\u01b0\u1edbi n\u00e0y chia c\u00e1c pixel th\u00e0nh c\u00e1c \u00f4 m\u00e0u c\u01a1 b\u1ea3n : Red, Green, Blue theo t\u1ec9 l\u1ec7 1 \u0111\u1ecf : 2 xanh l\u00e1: 1 xanh d\u01b0\u01a1ng ( v\u00ec m\u1eaft ng\u01b0\u1edd nh\u1ea1y c\u1ea3m v\u1edbi m\u00e0u xanh l\u00e1 nh\u1ea5t. Khi \u00e1nh s\u00e1ng \u0111i qua t\u1ea5m l\u01b0\u1edbi n\u00e0y pixel n\u1eb1m d\u01b0\u1edbi \u1ed5 \u0111\u1ecf chi \u0111o xem c\u00f3 bao nhi\u00eau l\u01b0\u1ee3ng \u00e1nh s\u00e1ng \u0111\u00f3 l\u1ecdt v\u00e0o, t\u01b0\u01a1ng t\u1ef1 v\u1edbi \u00f4 xanh l\u00e1 v\u00e0 xanh d\u01b0\u01a1ng.
V\u1eady d\u1eef li\u1ec7u trong file Raw l\u00e0 g\u00ec? N\u00f3 ch\u1ec9 l\u00e0 m\u1ed9t file v\u0103n b\u1ea3n kh\u1ed5ng l\u1ed3 ch\u1ee7a c\u00e1c con s\u1ed1 ki\u1ec3u nh\u01b0 : pixel t\u1ecda \u0111\u1ed9 A c\u00f3 m\u1ee9c \u0111\u1ed9 s\u00e1ng l\u00e0 50 d\u01b0\u1edbi l\u01b0\u1edbi l\u1ecdc \u0111\u1ecf, pixel t\u1ecda \u0111\u1ed9 B c\u00f3 m\u1ee9c \u0111\u1ed9 s\u00e1ng l\u00e0 80 d\u01b0\u1edbi l\u01b0\u1edbi l\u1ecdc xanh l\u00e1. N\u00f3 ho\u00e0n to\u00e0n kh\u00f4ng c\u00f3 m\u1ed9t \u0111i\u1ec3m m\u00e0u (RGB pixel) th\u1ef1c s\u1ef1 n\u00e0o c\u1ea3. N\u00f3 ch\u1ec9 l\u00e0 m\u1ed9t ma tr\u1eadm d\u1eef li\u1ec7u th\u00f4 v\u1ec1 c\u01b0\u1eddng \u0111\u1ed9 \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c g\u00e1n nh\u00e3n m\u00e0u.<\/p>\n\n\n\n
<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u1ea2nh Raw b\u1ea3n ch\u1ea5t kh\u00f4ng c\u00f3 m\u00e0u s\u1eafc – \u0110\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e1ch n\u00f3i \u1ea9n d\u1ee5 m\u00e0 n\u00f3 l\u00e0 m\u1ed9t s\u1ef1 th\u1eadt v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt C\u1ea3m bi\u1ebfn m\u00e1y \u1ea3nh n\u00f3 ” m\u00f9 m\u00e0u”. Sensor \u0111\u01b0\u1ee3c c\u1ea7u t\u1ea1o t\u1eeb h\u00e0ng tri\u1ec7u t\u1ebf b\u00e0o quang \u0111i\u1ec7n nh\u1ecf x\u00edu. C\u00e1c t\u1ebf b\u00e0o quang \u0111i\u1ec7n n\u00e0y ch\u1ec9 … \u0110\u1ecdc ti\u1ebfp<\/a><\/p>\n","protected":false},"author":1,"featured_media":22,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,9],"tags":[23,22,25],"class_list":["post-261","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ky-nang-moi","category-tu-than-van-dong","tag-lightroom","tag-photo-editing","tag-tuthanvandong"],"_links":{"self":[{"href":"https:\/\/trongpham.com\/index.php?rest_route=\/wp\/v2\/posts\/261","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/trongpham.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/trongpham.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/trongpham.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/trongpham.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=261"}],"version-history":[{"count":2,"href":"https:\/\/trongpham.com\/index.php?rest_route=\/wp\/v2\/posts\/261\/revisions"}],"predecessor-version":[{"id":264,"href":"https:\/\/trongpham.com\/index.php?rest_route=\/wp\/v2\/posts\/261\/revisions\/264"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/trongpham.com\/index.php?rest_route=\/wp\/v2\/media\/22"}],"wp:attachment":[{"href":"https:\/\/trongpham.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=261"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/trongpham.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=261"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/trongpham.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}