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Ebook c Su tm v Chnh Sa By Nguyn Ngc Li ni u: Nh cc bn bit kin thc l v hn m sc ngi th c hn v th mnh cgng bin tp li nhng g mnh hc v tch ly c bin tp thnh ebook ny phc v mc ch nghin cu v hc tp ca chnh mnh. Nu cc bn no thch th ti liu ny cc bn c th sao chp li phc v nghin cu v hc hi nhng khng c dng trong mc ch khc nh mua bn. Ni dung trong ebook ny c nhng kin thc mnh hc v su tm trn internet k c nhng th thut do mnh ngh ra. Mnh xin chn thnh cm n cc tc gi t nhiu ngun khc nhau gip mnh hon thnh ebook ny. Do khng chuyn su nn bi vit ca mnh hiu sao mnh lm vy v th khng th trnh c nhng sai xt ng tic xin cc bn thng cm. Xin chn thnh cm n!

CH : Nhng Tuyt Chiu Tch Nn Vi Photoshop M Khng Cn B Lc No Ht Nh ha vi cc bn hm nay mnh s cp n mt vn cng kh th v trong khi s dng Photoshop. l vn tch nn, mnh s a ra nhiu vn

Phap Su IT Meo BiBi Heo Dat

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Ebook c Su tm v Chnh Sa By Nguyn Ngc t c bn n phc tp. ch sau mnh s hng dn cc bn tch nn vi nhng b lc... Nhng phn mm h tr nh Mask pro.... Khng di dng mnh vo thng vn lun: 1. Nhm cng c Lasso

Nhm cng c ny rt d dng, n s gip bn to vng chn ln i tng mt cch nhanh chng. - Mnh xin ni s v cng c Lasso Tool

s dng cng c ny cc bn ch vic Kch chut ti mt im trn nh sau gi lun chut v r n vng khc to nn mt vng khp kn nh vy l bn s c c vng chn. Cc bn xem hnh sau: V d mnh s tch ci ming ca ch mo my remon ra khi nn nh sau: u tin cc bn m file nh cn tch ln.


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Ebook c Su tm v Chnh Sa By Nguyn Ngc

Sau cc bn dng cng c lasso tool kch mt im trn ng bin trn ci ming ch Mo my ng thi gi v r chut to nn vng chn quang ci ming nh hnh sau:


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Mnh nhn thy cng c ny khng ng dng nhiu cho my nn mnh ch a ra vy thi cc bn thc hin thm. Nhn xt nh v cng c: Bn c th dng n to vng chn cho nhng nh khng cn chnh xc cao, i vi nhng nh cn chnh xc cao bn khng nn dng cng c ny. - Cng c Polygonal Lasso Tool

Cng c ny s dng cng tng t nh cng c lasso tool thi, cc bn ch vic kch chut chn cng c v ko r theo bin i tng l c. Nhng cng c ny c im khc bit so vi cng c lasso l n ch chn c nhng vng chn bao gm nhng ng thng, hay on thng. Nu cc


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Ebook c Su tm v Chnh Sa By Nguyn Ngc bn mun chn nhng i tng c dng cong hay khng thng th mnh phi ko tng on rt nh vy l ok. Cc bn xem nh v d sau: y l kt qu mnh t m lm

- Cng c Magnetic Lasso

cng c ny s t ng i theo ng bin gii ca s tng phn, tng phn cao th chnh xc cng cao, Ngi ta hay ni rng cng c ny nh mt nam chm c kh nng bt dnh.


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Ebook c Su tm v Chnh Sa By Nguyn Ngc Nhn xt: Theo mnh nhn thy th trong nhm cng c lasso th 2 cng c c dng nhiu nht chnh l Polygonal Lasso Tool v Magnetic Lasso Tool.

Mt s ch :- Tm li mt cu s dng nhm cng c Lasso cc bn ch cn chn cng c v ko chut r theo ng bin nh l c - Khi thao tc vi cng c ny bn nn thao tc chm chm thi, chnh xc bn nn to im neo c nh nh, Khi im neo no lch ra khi vng chn bn ch cn bm phm Delete hay phm Backspace loi b n. - Khi c vng chn ri m rng vng chn cc bn ch cn nhn gi phm Shift v v tip ngc li nu bn mun loi b bt vng chn th bn nhn phm Alt.

- Nu to vng chn c tng phn gia ng bin v nn cao th bn nn dng cng c bt dnh Nam Chm Magnetic Lasso Tool, cn nu vng chn l nhng on thng th bn nn dng cng c Polygonal Lasso Tool 2. Dng cng c Magic Wand Tool:

Cng c ny ngi ta cn gi l cy a thn, cng c ny c s dng khi mu ca i tng cn tch v mu nn c tng phn cao Hay ni cch khc l mu ca chng khc nhau v mu nn a s l mt mu duy nht hay t mu th cng c ny s l s la chn ng gi cho bn. V d: mnh ly li ch mo my hi ny nha


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Cc bn thy rng mu nn l mt mu trng, nh vy tng phn v mu sc gia ch mo vi nn l rt cao v th ta nn dng cng c cy a thn. thc hin bn chn cng c v click vo nn mu trng pha tay phi ca ch mo, cc bn s c nh sau.


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Gi th lm sao chn tip y ta? Mun thm vng nh th mnh chn cng c v nhn gi Shift vo nhng phn trng cn li, cc bn s c nh sau:


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Mc ch chnh ca chng ta l chn ch mo my nn cc bn phi o ngc vng chn bng phm tt Shift + F7 hay vo menu Select -> Inverse.


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Kt qu cc bn s c nh hnh sau:


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chuyn nh ch mo ta va chn sang nn khc ta bm phm tt V hay dng cng c move tool (V) kch vo vng nh c chn v ko sang nn mi.


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Ebook c Su tm v Chnh Sa By Nguyn Ngc Mt cch khc chuyn nghip hn v hay hn chuyn vng chn sang layer mi cc bn vo Layer -> Duplicate layer... hay kch chut phi ln layer v chn Duplicate layer...

Lc ny mt hp thoi Duplicate hin ra nh sau:


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Ti mc Document cc bn ch nh n file nh lm nn cho ch mo vi u kin l file nh phi c m v ang nm trn giao din ca Photoshop.

3. Dng cng c Pen tool

Chc khng phi ni nhiu nghe n tn cng c l mnh ngh ngay n vic g ri? Vic g vy cc bn, ci ny phi i hi my c bn gi l c cu tr li ngay y m v mnh thy cc c y hay dng cng c ny v hoa l c cy ....hay l chng bch m hong t g g y m. Ni chi thui ch dng cng c ny m v thnh mt chng hong t nh m th mnh s bi lm s ph lun, c chng ch c nhng chuyn gia mi c kh nng thi. Cch s dng cng kh n gin, cc bn ch vic chn cng c v chn ty chn Paths cho khi sinh ra Shape layers lung tung, v xong bn nhn Ctrl+Enter chuyn thnh vng chn l c.


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Ebook c Su tm v Chnh Sa By Nguyn Ngc Cng c ny c ci hay ch l bn c th v c ng cong theo mun. Sau khi chn cng c Pen ta click vo im bt u ca vng chn. Tip theo click vo im nm trn ng cong lin tc ca vng chn . Khi click im tip theo khng th chut m gi v keo theo hng tip theo, iu chnh sao cho cm thy ng cong i ng hng m bn mun ri th ra. v tip ng tip theo bn phi chnh li vecto mi va ko bng cch gi Alt v ko im u ca vecto theo hng i tip theo ca ng cung. Mnh hay dng cng c ny cho nhng nh c mu nn v mu i tng kh phc tp v tng phn gia chng khng cao. Ni th ni vy thi nhng vi mt i tng qu phc tp m cc bn dng cng c ny th khng n t no, v d mnh mun tch c gi trong bc nh sau ra th liu c lm c khng?

Cu tr li l c nhng bn phi tn thi gian kh lu, c tch t t m ko lm mt mt si tc no th chc l hoa c mt, chng c mt .... 4. Lnh Extract. Lnh ny kh hay tch hnh khng nhng nhanh m n cn c th dng tch tc, con ngi hay lng con vt ..... hay ni chung l c th tch c


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Ebook c Su tm v Chnh Sa By Nguyn Ngc nhng i tng mnh (tc...) khi nn khng cng mt mu vi i tng hay khi i tng c mu t hay tt nht l mu c. Mnh nhn thy Lnh Extract ny cng kh hay nhng khng hiu v sao t phin bn cs4 v cs5 mnh li khng thy c lnh ny. Mo : V hng dn cc bn mnh coppy file ExtractPlus.8BF trong th mc Filters ca photoshop cs3 em qua Photoshop cs5. dng lnh ny cc bn vo Filter->Extract..

Mt hp thoi Extract s xut hin nh hnh sau:


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Bn dng cng c u tin Edge Highlighter v mt ng vin khp kn quanh i tng mnh cn tch khi nn. Bn nn nh phi khp kn nu khng l khng n u ah nha. Kt hp phm Ctrl khi r chut s gip ccoong c thng minh ... ti u hn.


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Hnh nh sau khi cc bn v mt ng vin khp kn, gi s mnh ch tch ly cy u thui.Trong qu trnh dng cng c Edge Highlighter nu bn thy khng va bn c th nhn t hp phm Ctrl + Z tr v bc trc .


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Tip theo cc bn dng cn c Fill v tr th 2.

Click vo bn trong i tng t mu cho n nh sau:


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Nhn nt Preview xem trc kt qu v bt u hiu chnh cho hon tt. Bn xem k hnh di v nhn xt xem, cc bn thy i tng c tch thng b d hay b mt mt phn no c ng khng n. V y cng l vn lun lun gp phi khi bn s dng cng lnh Extract ny.


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phc hi nhng vng nh b mt cc bn dng cng c History Brush (Y) ly li nhng vng nh b mt. Trng hp bn mun b bt i i tng nn th bn dng cng c Eraser, cng

c ny s gip bn xa i nhng vng nh cn tha li. Lu khi s dng hai cng c History Brush (Y) v Eraser th bn nn chn c mm. y l hnh nh sau khi mnh x l:


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Lu : y l mt lu kh quan trng bn phi nh k, bn mun dng tt lnhExtract th bn phi hnh nh nguyn tem... hihi tc l t khi m hnh ln bn khng c crop nh hay xoay nh... ni tm li mt cu l bn khng nn chnh hay thao tc bt c g ln hnh nh trc khi dng lnh Extract, Nu bn thao tc lung tung n s bo li v khng cho bn dng cng c History Brush.

5. Quick MaskCng c ny s gip bn to nn vng chn mt cch nhanh chng nhng theo mnh th n hay p dng cho nhng i tng khng cn chnh xc cao. Cch ny tuy n gin nhng hiu qu em li cao lm cc bn. No chng ta cng nghin cu no: u tin m tm hnh bn mun tch ra, mnh khng dng cy u na v nhn hoi chn cht khng p trai nh mnh... hihi. Hix gin t cho vui thi gi ta tr li vn no... Vng i ! M ca ra....Um ba la.... h ... Mt qu t m ra cho chc.


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u tin cc bn n phm D tr li mu mc nh Foreground l mu en v mu background l mu trng tin hnh dng lnh quick mask. Nu n vn mc nh th khng cn nhn D


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Tip theo cc bn kch vo biu tng Quick Mask hay phm tt Q khi ng Quick Mask, sau cc bn chn cng c brush vi c trn t ln i tng.

Bn tin hnh t ln i tng nh sau:


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Cc bn nhn thy rng khi t c mu , vng mu s lm vung chn. Nu l t lan ra ngoi bn bm phm X xa i, Bm li phm X ln na t tip. Hnh nh sau khi mnh to xong.


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Khi t xong cc bn bm phm q hay kch li biu tng Quick Mask tr li ch bnh thng nh sau:


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Cc bn o ngc vng chn li bng phm Shift + F7. V sao phi o ngc vng chn? Bn hy quan st xem khi mnh va lm xong th khu vc c chn khng phi l c b m l phn nn pha sau c b, v th ta phi tin hnh o ngc vng chn.


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Vy l bn to c vng chn bng Quick Mask ri . Mnh lm khng k nn vng chn mnh khng t tiu chun lm, cc bn lm t t se c kt qu tht m mn.

6. Dng nhm cng c Eraser:

Bn ng nhm tng nha, ci ty ny hay lm , ngy trc mnh tch nn ch bng duy nht bng nhm cng c ny . Hix ti mnh li qu nn .... mi vy. Mi cc bn vo xem tnh nng ca tng cng c:


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Ebook c Su tm v Chnh Sa By Nguyn Ngc Trn nhiu din n mnh ch thy cp n 2 cng c Background Eraser tool v Magic Eraser tool. Mnh s cp vi cc bn thm cng c u tin l Eraser tool. - u tin cc bn m file nh cn tch ln, mnh chn nh sau:

- Bn bm Ctrl + J nng lp hnh ln lp layer 1


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- Add mt n lp ln lp layer 1 v chn cng c Eraser tool

-

-

Gi mnh tin hnh xa i nhng vng nh khng cn thit bng cch chn vo lp mt n v tin hnh xa. xa c th bn phi Foreground l mu trng v mu background l mu en tin hnh xa. Ah Qun na bn phi tt con mt layer Background i, mnh c vy cn lm v d tip theo.


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- Cc bn chn vo lp mt n lp v tin hnh xa nh sau:

- Cc bn c xa t t, bm phm X chuyn i qua li t c kt qu ng nht.


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Ebook c Su tm v Chnh Sa By Nguyn Ngc Lu : gn ng bin gia i tng v nn, mnh hay phng to nh ra tm s khc bit v mu sc chng ta d dng ty xa v hiu chnh - Kt qu cui cng khi bn lm cn thn s nh th ny:

Cng c Background Eraser tool

Cng c ny cho php xa c layer Background kha thnh layer trong sut. Thch hp cho nh c nn mt mu chng hn nh hnh chn dung ngi c tc mai bay t tung trn nn mt mu th dng cng c ny rt l OK, m bo l khng mt mt si tc no (d nhin l mu tc v mu nn phi tng phn nhau). - Cc bn m File hnh cn chnh sa ln:Phap Su IT Meo BiBi Heo Dat Page 32


- Cc bn kch chn cng c v to cc thit t vi cc thng s sau:

Trn thanh thuc tnh chn mc Limits l Discontiguous v khng check chn vo Protect Foreground Color, tolerance : 50%.


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Hix gi th mnh tin hnh x l thi no. - Trc tin nhp chn Sampling: Continuous ri click mt ci vo vng mu nn mun loi b

- sau tr li thanh thuc tnh nhp vo Sampling: Background Swatch v Click xa t t thi kt qu s rt bt ng .


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- cc bn tin hnh ty xa nn:


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- Kt qu sau khi ty xa s nh sau, cc bn nhng du mi tn xanh mnh ch Hnh di, khi ty phm vo vng trong nh cc bn dng History Brush Tool khi phc li


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- Kt qu sau khi hon chnh :


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- Kinh nghim nh: Bn nn Spacing vi thng s nh nh vy khi ta r chut gn st bin ca i tng n s t b phm mnh vo i tng hn, phi phc hi li.

Cng C Magic Eraser tool:


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Xa vng nh c mu tng ng, c th xa c lp Background ang kha thnh mt lp trong sut. Cng c ny u im hn cng c Background Eraser tool ch cc bn c th xa trc tip lin m khngcn phi dt thng s lung tung. Mt im lu khi bn dng cng c ny bn hy ch n tr s Tolerance trn thanh thuc tnh, gi tr nh nu vng nn khp kn cn xa nh. Bn m gi tr ln qu l n xa lun i tng ca bn . Hix iu ny th khng vui u ah nha.

Cch s dng rt n gin cc bn ch cn chn cng c v sau iu chnh tr s Tolerance sao cho ph hp v sau kch vo vng nh c nu tng ng cn loi b. Cc bn quan st hnh sau:


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7. Dng Lnh Replace color...Khng phi lc no cc bn cng tch hay loi i tng ra khi nn ri sau mi ghp. Ti sao chng ta khng thy i nn mt cch trc tip lun? Lnh Replace color ny s gip cc bn thay th mu trn bc nh ca bn mt cch nhanh chng v tin li. Mnh s dng hnh sau lm bi hng dn:


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- u tin chng ta phi loi b nn xanh ca tm nh, lm c vic ny cc bn vui lng chn Menu Image -> Adjustments -> Replace Color . . .


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- Mt hp thoi Replace Color Hin ra nh sau:


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- Cc bn s c 3 biu tng cy bt ht mu trong cy bt u tin dng chn vo

mu cn thay th trn bc nh.


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Ebook c Su tm v Chnh Sa By Nguyn Ngc - Cy bt th hai Cy bt c du + dng ly thm mu thay th

- Cy bt th 3 Cy bt c du - dng loi bt mu thay th

u tin cc bn dng cy bt u tin click vo nn xanh trn tm nh nh sau:


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Ebook c Su tm v Chnh Sa By Nguyn Ngc Khi chn mu cn thay th,trn hp preview mu trng s i din cho vng mu c chn v mu en i din cho vng mu khng c chn. Tip theo cc bn iu chnh thanh trt Fuzziness tng ko thanh trt v pha tay phi hay gim ko thanh trt v pha tay trich nh hng mu sao cho ph hp. dy mnh ko sao cho vin en bn ngoi i tng c gi bin mt ht:

- Cc bn lu mt iu l khng nn ko thanh trt sang tay phi qu v nh h s nh hng dn phn tc ca c b. Sau khi chn mu xong bn thc hin nhng vic sau: - Cc Bn hy quan st khung Replacement sau


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- thay i mu Cc bn r chut trn thanh Hue thay i mu ( nh lun Kch preview bn s thy mu thay i lp tc trn file nh) - Cc bn r chut trn thanh Saturation thay i bo ha mu (khi ta ko r chut sang tri th mu sc c khuynh hng tr thnh trng en ngc li th mu sc s trng rc hn). - Cc bn r cht trn thanh Lightness thay i sng ti (r sang phi s thm mu trng, r sang tri s thm mu en). Ngoi Bn cn c th chn trc tip mu cn thay th trong hp mu ResultPhap Su IT Meo BiBi Heo Dat Page 46


- y mnh chn mt mu ging vi mu ca chic vy c b ang mc to nn mt bc nh mang tnh ngh thut hn.

Cc bn dng cng c Cy bt ht mu Eyedropper tool v chn vo mt im trn vy c b - Gi s mnh chn im sau.


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- Sau khi cc bn dng cng c Eyedropper tool kch vo mt im trn chic vy ca c b th mu nn cng s c thay i theo ng nh mu trn chic vy m mnh va chn. - Bn c th iu chnh bo ha mu hay lm tng gim sng ti mu sc bng cch tng hay gim thng s trn cc thanh trt trong khung Replacement, mnh thng s sau:


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- cc bn nhn thy phn nn pha sau c gi a c i mu rt p, gi y iu quan trng l cc bn lm sau x l vin xanh trn bao quanh may tc v vy c gi. - Kh i lp mu xanh c trn hnh cc bn phi p dng phuong php t mu... thc hin cc bn to mi mt layer Layer -> New -> Layer...


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Cc bn s c mt layer rng nh sau:

- Ti knh layer cc bn chn ch d ha trn layer l color, mc ch ca chng ta l chn layer va to v t ma cho n sao cho cc phn xanh trn bc nh c gi hon ton bin mt.


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Cc bn dng cng c cy bt ht mu v chn mt im trn nn cnh my tc c gi, Mnh c tnh chn nh th ny v nh th s to ra s ha nguyn, hay ni cch khc l s kt hp gia nn v mi tc to nn s chuyn nghip v s p hn Cc bn nhn thy mi tc c gi cng c phn no ging nn v th chn mu nn.


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- Tip n cc bn dng brush vi loi c nhe v thng s opacity nh thi cc bn tin hnh ty xa n khi phn xanh bin mt ht, vi thao tc ny cc bn nn thc hin t t kt qu s p hn. Kt qu sau khi phn xanh a c loi b:


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- cc bn x l phn mu xanh chic vy cng tng t nh phn tc nhng bn nn ht mu chic vy v nh th s to nn s chung thc ca chic vy hn. Kt qu sau khi thc hin.


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N h vy phn x l mu xanh cc bn lm xong, gi to nn mt nn ngh thut hn cc bn tin hnh nh sau: C nhiu cch to nn mt phng nn ngh thut, mnh place mt phng nn m mnh thch vo. Gi s mnh place hnh sau:


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Kt qu sau khi mnh place hnh vo:


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Mnh ko sao cho phng nn va kht vi hnh nh sau:


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- Gi th cc bn chn mt trong nhng ch ha trn layer sao cho ph hp nht, ci ny ty vo hnh m mnh chn ch ha trn layer thi. i vi hnh ny mnh chn ch ha trn l Soft Light v opacity lad 38%.


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Ebook c Su tm v Chnh Sa By Nguyn Ngc Kt qu nh hnh sau:

Cc bn nhn thy lp nn 2 nm trn lp lp Background nn ngi xem khng c t nhin lm v hnh nh c b ging nh nm sau bc phong nn v th to mt cm gic tht hn, n gin y l cc bn cho nn n xung pha di c b l ok. lm c iu ny cc bn to mt lp mt n trn nen2 v sau d dng brush t ln gng mt v tc ly li gng mt v phn tc v nhng dim nhn trn o, nh vy l phn fnn mnh x l xong. Bn lu l nn dng c nhe vi li gim thng s opacity nh vy s to nn s mm mi hn...


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- Kt qu sau khi mnh x l:

- Gi y cc bn c c mt phng nn mi rt chuyn nghip v mang tnh ngh thut cao. nng cao tnh ngh thut ca hnh nh cc bn lm mt vi thao tc sau nng cao thm tnh c o ca tm nh.


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Ebook c Su tm v Chnh Sa By Nguyn Ngc u tin cc bn to mt lp layer mi, dng cng c ht ly mu nn ca

bc nh, dung mt cng c to vng chn elip khoanh mt vng nh sau:

- Sau cc bn cho Feather vi thng s 80 100%


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C c bn tin hnh mu ln l s c kt qu nh hnh sau, lu l trc khi mu th cc bn vui lng o ngc vng chn. - o ngc vng chn Shift + F7


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- Tip theo cc bn cho feather c thng s t 80 100% - mu


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- Kt qu sau khi thc hin.


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Ebook c Su tm v Chnh Sa By Nguyn Ngc - Vy l cc bn c trong tay mt tm hnh hon ton c o v mang tnh ngh thut cao.


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Ebook c Su tm v Chnh Sa By Nguyn Ngc 8 . Dng lnh Color Range:Lnh ny rt n gin m hu dng vi nhng nh c mu nn v mu i tng phc tp nhng gia chng c tng phn cao. - thc hin cc bn vo mc Select > Color Range


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- Click chn vo mc Selection, dng cng c Eyedropper


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trong hp thoi ht mu mt im trng nht (hay en nht) trong hnh khung bn cnh hoc a ra ngoi file nh ht mu mt im sng nht (hay ti nht) ca nh. - sau dng tip cng c Add to Sample (cng trong hp thoi, ngay cnh cc Eyedropper)


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click vo nhng vng mu en (hay trng) cn li cho ti khi no cc vng y chuyn ht thnh trng (en) mi thi, khi i tng cn chn s l mt mu en (trng).


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- Nhp OK v nhn Shift+F7 vng chn bao quanh i tng. Nu c vng chn c b lem nhem trong ngoi th dng nhm cc Lasso hay Quick Mask vi cc Brush tt li cho ng l xong. V y l kt qu:


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Lu : v mnh lm ebook ny trn Phin bn Photoshop CS5 nn cnhiu ch khc vi nhng phin bn khc nhng c bn cc bc cng lm nh vy. Cn nhiu cch na nhng do kin thc mnh c hn nn mong cc bn ng gp thm cng nhau hc hi v nghin cu. Hn gp li trong ch tip theo.


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