{"id":145,"date":"2026-05-25T14:16:15","date_gmt":"2026-05-25T07:16:15","guid":{"rendered":"https:\/\/trongpham.com\/?p=145"},"modified":"2026-05-29T15:29:37","modified_gmt":"2026-05-29T08:29:37","slug":"trong-hoc-photoshop-phan-4","status":"publish","type":"post","link":"https:\/\/trongpham.com\/?p=145","title":{"rendered":"Tr\u1ecdng H\u1ecdc PHOTOSHOP Ph\u1ea7n 4"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">VIII C\u00f4ng c\u1ee5 ch\u1ecdn Selection Tool<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>M ( ch\u1ecdn h\u00ecnh vu\u00f4ng, ho\u1eb7c h\u00ecnh elip)<\/strong> &#8211; con tr\u1ecf chu\u1ed9t \u1edf b\u00ean trong h\u00ecnh th\u00ec ta c\u00f3 th\u1ec3 di chuy\u1ec3n v\u00f9ng ch\u1ecdn sang v\u1ecb tr\u00ed kh\u00e1c.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">Shift - c\u1ed9ng th\u00eam v\u00f9ng ch\u1ecdn v\u00e0o v\u00f9ng \u0111\u00e3 ch\u1ecdn. <br>Alt - C\u1eaft b\u1ecf v\u00f9ng ch\u1ecdn b\u1eb1ng v\u00f9ng ch\u1ecdn m\u1edbi v\u1ebd ra, n\u00f3 s\u1ebd lo\u1ea1i b\u1ecf v\u00f9ng giao nhau c\u1ee7a 2 v\u00f9ng ch\u1ecdn.<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Lasso Tool<\/strong>, ho\u1eb7c <strong>Slection Brush Tool<\/strong>, ch\u1ecdn v\u00f9ng ch\u1ecdn b\u1eb1ng c\u00e1ch v\u1ebd t\u1ef1 do. \u0110\u00e2y l\u00e0 c\u00f4ng c\u1ee5 d\u00f9ng kh\u00e1 nhi\u1ec1u. <br><strong>W Object Selection Tool <\/strong>ch\u1ecdn object, photoshop s\u1ebd t\u1ef1 hi\u1ec3u v\u00e0 ch\u1ecdn v\u1eadt th\u1ec3 cho b\u1ea1n, v\u00ec n\u00f3 ho\u1ea1t \u0111\u1ed9ng t\u1ef1 \u0111\u1ed9ng n\u00ean kh\u00f4ng th\u1ec3 ch\u00ednh x\u00e1c ho\u00e0n to\u00e0n, v\u00ec v\u1eady ta k\u1ebft h\u01a1p W xong r\u1ed3i <strong>Shift<\/strong> ho\u1eb7c <strong>Alt L <\/strong>\u0111\u1ec3 c\u1ed9ng tr\u1eeb v\u00f9ng thi\u1ebfu th\u1eeba.<br><strong>Ctrl D<\/strong> &#8211; b\u1ecf v\u00f9ng ch\u1ecdn \u0111ang ch\u1ecdn.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">K\u1ebft h\u1ee3p thao t\u00e1c <strong>Zoom ( Z), Space, v\u00e0 v\u1ebd<\/strong> \u0111\u1ec3 t\u1ea1o m\u1ed9t v\u00f9ng ch\u1ecdn th\u1ee7 c\u00f4ng theo \u00fd mu\u1ed1n nh\u1ea5t. Sau \u0111\u00f3 nh\u1ea5n <strong>Ctrl 0 \u0111\u1ec3 b\u1ee9c tranh thu nh\u1ecf v\u1eeba v\u1eb7n m\u00e0n h\u00ecnh.<\/strong><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Quick Mask Mode<\/strong> &#8211; <strong>Q + Brush + T\u00f4 + Q<\/strong> &#8211; V\u00f9ng t\u00f4 \u0111en s\u1ebd th\u00e0nh v\u00f9ng b\u1ecf ch\u1ecdn, v\u00f9ng t\u00f4 tr\u1eafng s\u1ebd l\u00e0 v\u00f9ng \u0111\u01b0\u1ee3c ch\u1ecdn. T\u01b0\u01a1ng \u0111\u1ed3ng v\u1edbi <strong>Slection Brush Tool<\/strong> &#8211; Nh\u01b0ng chi ti\u1ebft h\u01a1n, ch\u1ecdn v\u00f9ng ch\u1ecdn ph\u1ee9c t\u1ea1p h\u01a1n v\u00ec ch\u00fang ta c\u00f3 th\u1ec3 thay \u0111\u1ed5i c\u1ecd v\u1ebd, d\u00f9ng c\u1ee5c t\u1ea9y \u0111\u1ec3 x\u00f3a n\u1ebfu t\u00f4 b\u1ecb lem. D\u00f9ng k\u1ebft h\u1ee3p v\u1edbi <strong>Shift Ctrl I<\/strong> &#8211; \u0110\u1ea3o ng\u01b0\u1ee3c v\u00f9ng ch\u1ecdn &#8211; \u0111\u1ec3 ch\u1ecdn \u0111\u00fang v\u00f9ng ch\u1ecdn m\u00e0 ta \u0111\u00e3 t\u00f4 b\u1eb1ng Brush.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">C\u00f3 2 lo\u1ea1i c\u00f4ng c\u1ee5 ch\u1ecdn - t\u1ea1o v\u00f9ng ch\u1ecdn t\u1ef1 \u0111\u1ed9ng - t\u1ea1o v\u00f9ng ch\u1ecdn th\u1ee7 c\u00f4ng. V\u00f9ng ch\u1ecdn t\u1ef1 \u0111\u1ed9ng s\u1ebd kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng t\u1ed1t v\u1edbi nh\u1eefng b\u1ee9c tranh c\u00f3 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n th\u1ea5p gi\u1eefa v\u1eadt th\u1ec3 c\u1ea7n ch\u1ecdn v\u1edbi ph\u1ea7n c\u00f2n l\u1ea1i. V\u1edbi nh\u1eefng tr\u01b0\u1eddng h\u1ee3p n\u00e0y, ta b\u1eaft bu\u1ed9t ph\u1ea3i d\u00f9ng c\u00e1c c\u00f4ng c\u1ee5 ch\u1ecdn th\u1ee7 c\u00f4ng.\nTh\u00f4ng s\u1ed1 Feather - \u0111\u1ed9 nh\u00f2e bi\u00ean - khi ch\u1ecdn c\u00e1c v\u1eadt th\u1ec3 c\u00f3 \u0111\u1ed9 nh\u00f2e nh\u01b0 m\u00e2y, kh\u00f3i th\u00ec ta t\u0103ng Feather l\u00ean tr\u01b0\u1edbc khi v\u1ebd v\u00f9ng ch\u1ecdn \u0111\u1ec3 ranh gi\u1edbi c\u1ee7a v\u00f9ng ch\u1ecdn \u0111\u01b0\u1ee3c l\u00e0m m\u1edd v\u00e0 minh d\u1ea7n ra xung quanh. Khi ch\u1ecdn ng\u01b0\u1eddi ho\u1eb7c \u0111\u1ed3 v\u1eadt, ta \u0111\u1ec3 n\u00f3 th\u00e0nh 0px \u0111\u1ec3 t\u1ea1o bi\u00ean v\u00f9ng ch\u1ecdn s\u1eafc n\u00e9t v\u00e0 th\u1eb3ng. \nKhi v\u1ebd v\u00f9ng ch\u1ecdn c\u00f3 th\u1ec3 b\u1ecb \u1ea9n \u0111i, Ctrl H \u0111\u1ec3 \u1ea9n\/b\u1ecf \u1ea9n v\u00f9ng ch\u1ecdn.\nKhi \u0111ang \u1edf c\u00f4ng c\u1ee5 v\u00f9ng ch\u1ecdn, ta s\u1ebd di chuy\u1ec3n v\u00f9ng ch\u1ecdn \u0111\u00f3 sang v\u1ecb tr\u00ed kh\u00e1c. N\u1ebfu ta d\u00f9ng Move tool V th\u00ec v\u00f9ng ch\u1ecdn s\u1ebd c\u1eaft v\u00e0 di chuy\u1ec3n lu\u00f4n c\u1ea3 m\u1ea3ng h\u00ecnh \u1ea3nh sang v\u1ecb tr\u00ed kh\u00e1c.\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>B\u1ea3ng Select and Mask<\/strong> &#8211; Khi ch\u1ecdn nh\u1eefng v\u1eadt li\u1ec7u si\u00eau kh\u00f3 nh\u01b0 t\u00f3c x\u00f9, l\u00f4ng m\u00e8o, l\u00e1 c\u00e2y liti &#8211; c\u00e1c v\u1ec7t th\u1ec3 m\u1ec1m m\u1ea1i, ph\u1ee9c t\u1ea1p m\u00e0 c\u00e1c c\u00f4ng c\u1ee5 ch\u1ecdn th\u00f4ng th\u01b0\u1eddng b\u00f3 tay. Sau khi v\u1ebd \u0111\u01b0\u1ee3c m\u1ed9t v\u00f9ng ch\u1ecdn b\u1eaft k\u00ec, ta b\u1ea5m v\u00e0o Select and Mask tr\u00ean Option bar &#8211; m\u1ed9t kh\u00f4ng gian l\u00e0m vi\u1ec7c m\u1edbi s\u1ebd hi\u1ec7n ra v\u1edbi c\u00e1c c\u00f4ng c\u1ee5 \u0111\u1eb7c bi\u1ec7t:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Refine Edge Brush Tool &#8211; R<\/strong>:  T\u00f4 nh\u1eb9 c\u00e2y c\u1ecd l\u00ean v\u00f9ng r\u00eca t\u00f3c ho\u1eb7c l\u00f4ng th\u00fa dang b\u1ecb d\u00ednh m\u00e0u c\u1ee7a n\u1ec1n c\u0169. Photoshop s\u1ebd t\u1ef1 \u0111\u1ed9ng t\u00ednh to\u00e1n, gi\u1eef l\u1ea1i s\u1ee3i t\u00f3c m\u1ea1nh v\u00e0 l\u1ecdc b\u1ecf ho\u00e0n to\u00e0n m\u00e0u n\u1ec1n c\u0169 \u0111i.<\/li>\n\n\n\n<li><strong>Thanh tr\u01b0\u1ee3t View Mode &#8211; F<\/strong> : Thay \u0111\u1ed5i c\u00e1ch nh\u00ecn v\u00f9ng ch\u1ecdn \u0111\u1ec3 d\u1ec5 s\u1eeda l\u1ed7i.<\/li>\n\n\n\n<li><strong>Global Reefinements <\/strong>: Smooth &#8211; l\u00e0m m\u01b0\u1ee3t, Frather &#8211; l\u00e0m m\u1ec1m, contrast &#8211; l\u00e0m s\u1eaft n\u00e9t, Shidt Rdge &#8211; k\u00e9o v\u00f9ng ch\u1ecdn v\u00e0o trong ho\u1eb7c ra ngo\u00e0i 1 t\u00fd \u0111\u1ec3 gi\u1ea5u c\u00e1c \u0111\u01b0\u1eddng vi\u1ec1n lem lu\u1ed1c.<\/li>\n\n\n\n<li><strong>Decontamimate Colors &#8211; T\u1ea9y m\u00e0u \u00e1m<\/strong>: Khi c\u1eaft m\u1ed9t v\u1eadt t\u1eeb n\u1ec1n xanh l\u00e1, r\u00eca t\u00f3c r\u1ea5t d\u1ec5 \u00e1m m\u00e0y xanh. T\u00edch ch\u1ecdn \u00f4 n\u00e0y, photoshop s\u1ebd t\u1ef1 nhu\u1ed9m l\u1ea1i m\u00e0u t\u00f3c chu\u1ea9n cho c\u00e1c s\u1ee3i t\u00f3c b\u1ecb \u00e1m m\u00e0u \u0111\u00f3.<\/li>\n<\/ul>\n\n\n\n<h5 class=\"wp-block-heading\">M\u1ed9t v\u00e0i tuy\u1ec7t chi\u00eau khi l\u00e0m vi\u1ec7c v\u1edbi c\u00e1c c\u00f4ng c\u1ee5 ch\u1ecdn.<\/h5>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gi\u1eef ph\u00edm space khi v\u1ebd v\u00f9ng ch\u1ecdn h\u00ecnh vu\u00f4ng ho\u1eb7c h\u00ecnh tr\u00f2n &#8211; gi\u00fap s\u1eefa l\u1ed7i \u0111\u1eb7t l\u1ec7ch t\u00e2m khi v\u1ebd.<\/li>\n\n\n\n<li>Bi\u1ebfn v\u00f9ng ch\u1ecdn vu\u00f4ng g\u00f3c th\u00e0nh v\u00f9ng ch\u1ecdn x\u00e9o &#8211; V\u1ebd m\u1ed9t v\u00f9ng ch\u1ecdn h\u00ecnh ch\u1eef nh\u1eadt b\u1ea5t k\u00ec -> select -> transform selection.<\/li>\n\n\n\n<li>Ch\u1ecdn theo m\u00e0u : Selcect -> Color Range -> Con tr\u1ecf chu\u1ed9t bi\u1ebfn th\u00e0nh 1 h\u00fat m\u00e0u, ch\u1ecdn m\u00e0u n\u00e0o th\u00ec v\u00f9ng ch\u1ecdn s\u1ebd sinh ra theo m\u00e0u \u0111\u00f3. C\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh Fuzziness \u0111\u1ec3 t\u0103ng \u0111\u1ed9 nghi\u00eam ng\u1eb7t khi ch\u1ecdn m\u00e0u.<\/li>\n\n\n\n<li>Stroke Selection: Edit -> Stroke &#8211; l\u00e0m m\u01b0\u1ee3t n\u00e9t v\u00f9ng ch\u1ecdn.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>VIII C\u00f4ng c\u1ee5 ch\u1ecdn Selection Tool M ( ch\u1ecdn h\u00ecnh vu\u00f4ng, ho\u1eb7c h\u00ecnh elip) &#8211; con tr\u1ecf chu\u1ed9t \u1edf b\u00ean trong h\u00ecnh th\u00ec ta c\u00f3 th\u1ec3 di chuy\u1ec3n v\u00f9ng ch\u1ecdn sang v\u1ecb tr\u00ed kh\u00e1c. Shift &#8211; c\u1ed9ng th\u00eam v\u00f9ng ch\u1ecdn v\u00e0o v\u00f9ng \u0111\u00e3 ch\u1ecdn. Alt &#8211; C\u1eaft b\u1ecf v\u00f9ng ch\u1ecdn b\u1eb1ng v\u00f9ng ch\u1ecdn m\u1edbi v\u1ebd &#8230; <a title=\"Tr\u1ecdng H\u1ecdc PHOTOSHOP Ph\u1ea7n 4\" class=\"read-more\" href=\"https:\/\/trongpham.com\/?p=145\" aria-label=\"\u0110\u1ecdc th\u00eam v\u1ec1 Tr\u1ecdng H\u1ecdc PHOTOSHOP Ph\u1ea7n 4\">\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":[21,22,20],"class_list":["post-145","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ky-nang-moi","category-tu-than-van-dong","tag-digital-paiting","tag-photo-editing","tag-photoshop"],"_links":{"self":[{"href":"https:\/\/trongpham.com\/index.php?rest_route=\/wp\/v2\/posts\/145","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=145"}],"version-history":[{"count":13,"href":"https:\/\/trongpham.com\/index.php?rest_route=\/wp\/v2\/posts\/145\/revisions"}],"predecessor-version":[{"id":174,"href":"https:\/\/trongpham.com\/index.php?rest_route=\/wp\/v2\/posts\/145\/revisions\/174"}],"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=145"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/trongpham.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=145"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/trongpham.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}