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Forum CopilulMeu • View topic - Cum corectam pozele folosind programul Picasa

Cum corectam pozele folosind programul Picasa

Mituri si realitati! Femeile despre... barbati! Barbatii despre... femei!

Cum corectam pozele folosind programul Picasa

Postby ananda » Thu Nov 02, 2006 11:59 pm

pentru ca vad pe forum multe poze cu copii frumosi care au fatza albasta/galbena, ochii rosii, etc m-am gandit ca un mini tutorial despre cum sa corectam astfel de erori ale aparatului ar putea fi util.

am ales ca program Picasa deoarece e un program freeware si foarte usor de folosit care, in acelasi timp, poate sa faca majoritatea corectiilor de care e nevoie in mod obisnuit. nu terbuie sa "te pricepi", e un program intuitiv care da rezultate excelente in multe cazuri.

am luat o poza cu niste abtibilduri pe perete care a iesit prea intunecata (adica subexpusa) si am modificat-o, urmarind pas cu pas schimbarile.
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Postby anca1820 » Fri Nov 03, 2006 12:25 am

eu nu am programul [v]
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Postby ananda » Fri Nov 03, 2006 12:28 am

programul se poate downlowda free de la http://picasa.google.com/, unde e si un tutorial mai complet dar in engleza.


http://f7.yahoofs.com/users/I8d7AxBrWQ.D/__sr_/c09e.jpg?tkn=phk3mSFBQ2NnB11t&saveas=originalul

asta e originalul... e intunecat, un pic stramb si are in stanga o bucata de mobila care nu are ce cauta acolo.

ca sa o modific voi incepe prin a indrepta poza

daca va uitati cu atentie (poza mea e cam mica) veti vedea in stanga ecranului un meniu care se numeste "basic fixes". in acest meniu se pot modifica urmatoarele:

Crop - selectezi o portiune de imagine care te intereseaza si o "decupezi", astfel incat poza finala contine doar selectia respectiva

Straighten - indrepti o poza stramba

Redeye - corectezi ochii rosii (nu merge intotdeauna grozav dar e mai bun decat nimic)

I'm feeling lucky - modifica automat contrastul si culorile... asa cum crede el de cuviinta; uneori rezultatele sunt bune, alteori execrabile

Auto contrast si auto color - fac acelasi lucru, dar sunt butoane separate pentru contrast si culori

Fill light - e un cursor care creste luminozitatea generala a fotografiei



am inceput cu "straighten", apare o grila care ma ajuta sa vad cand e dreapta poza si un cursor pe care-l misc stanga/dreapta ca sa modific in sensul dorit

http://f7.yahoofs.com/users/I8d7AxBrWQ.D/__sr_/8b63.jpg?tkn=phoFnSFBdN2hgKZ4&saveas=Untitled-2
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Postby ananda » Fri Nov 03, 2006 12:30 am

am incercat pe urma un "I'm feeling lucky" dar rezultatul nu mi s-a parut grozav...

http://f7.yahoofs.com/users/I8d7AxBrWQ.D/__sr_/489d.jpg?tkn=phsTnSFB1aGO.oBA&saveas=I%27m+feeling+lucky
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Postby ananda » Fri Nov 03, 2006 12:42 am

asa ca am dat UNDO si am trecut la meniul urmator: "Tuning"

aici sunt mai multe cursoare:

Fill light - ca si la meniul precedent

Highlits - creste luminozitatea doar in zonele luminoase, lasand neatinse zonele intunecate

Shaddows - scade luminozitatea in zonele intunecate

de fapt cele 2 cursoare permit sa cresti contrastul

Color temperature - modifica temperatura de culoare; mai concret: daca ai o poza virata prea mult spre albastru misti cursorul spre dreapta si culoarea vireaza usor spre galben pana cand obtii ceva rezonabil; invers, in cazul pozelor virate spre galben misti cursorul spre stanga si corectezi problema


in afara de aceste cursoare mai exista si un "creionas" - Natural color picker care iti permite, daca ai o zona alba sau gri in poza sa alegi efectiv zona respectiva ca zona neutra corectand astfel temperatura de culoare. e ceva mai greu de lucrat cu el, trebuie sa ai putina experienta.


dupa toate modificarile de rigoare rezultatul arata asa:

http://f7.yahoofs.com/users/I8d7AxBrWQ.D/__sr_/3608.jpg?tkn=phsTnSFBZf2okYEe&saveas=Untitled-4

ceva mai bine, zic eu, decat cu "I'm feeling lucky"
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Postby ananda » Fri Nov 03, 2006 12:55 am

pentru ca imaginea nu mi s-a parut suficient de "sharp" (nu stiu cum sa zic asta in romana! [czid] cred ca "clar" ar fi cuvantul) am trecut la cel de-al treilea meniu. aici sunt niste casute cu "efecte speciale" [:D]

Sharpen - face ca imaginea sa fie mai clara; nu abuzati de el pentru ca modifica totusi culorile si la printarea pe hartie rezultatul poate sa arate mai rau. folosit o singura data la o poza e insa ok.

Sepia - teoretic face poze sepia, practic iese o porcarie, se poate obtine un efect mult mai reusit altfel

Black&white - face poze alb/negru

warmify - face culori mai calde, utile uneori la fetzele oamenilor, dar micsoreaza contrastul si modifica destul de mult culorile. sunt rare pozale la care o sa il puteti folosi

soft focus - permite sa ai o zona clara iar restul imaginii va fi neclara; poate fi util cand vrei sa scoti ceva in evidenta

saturation - creste sau scade saturatia culorilor (intensitatea culorilor, altfel spus)

celelalte efcte sunt mult prea particulare, nu prea are sens sa stau sa le explic, o sa vedeti daca folositi programul

cam asa arata poza dupa un sharpen:

http://f7.yahoofs.com/users/I8d7AxBrWQ.D/__sr_/1403.jpg?tkn=phwhnSFBWQJKzTJj&saveas=Untitled-5
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Postby ananda » Fri Nov 03, 2006 12:58 am

daca nu v-am plictisit prea tare si intereseaza pe cineva o sa va mai povestesc zilele urmatoare ce se mai poate face cu picasa sau cu alte programe similare.

va doresc sa faceti poze frumoase, care sa nu aiba nevoie de corectii! [foto]
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Postby MariaParvu » Fri Nov 03, 2006 7:02 am

super!!!
ca s-asha ma streseaza ca fie-mea iese cu ochii rosii dk ii bag blitz
ia sa vedem!
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Postby MariaParvu » Fri Nov 03, 2006 7:37 am

super!
m-am jucat cu culorile, pozele au iesit misto, ca aparatul meu nu e grozav, si deci am lucrat la color temperature...
da'... cosurile cum le scot? [:D]
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Postby ananda » Fri Nov 03, 2006 9:30 am

Maria, ma bucur ca ti-au fost de folos ideile! cu ochii rosii o sa incerc sa explic diseara (pana atunci nu cred sa ma lase cel mic!). cel mai bine e sa folosesti acel "anti red eye" al aparatului (daca-l are) si sa nu faci pozele chiar din fatza ci putin din lateral. de asemenea, in camera sa existe o sursa de lumina destul de puternica (cu cat e mai intuneric cu atat pupilele sunt mai dilatate si se vede mai bine retina, ceea ce da efectul de ochi rosii).

cu cosurile... se poate dar in programe mai sofisticate. si rezultatele depind mult de experienta si rabdarea celui care face prelucrarea. in Picasa poti cel mult sa desaturezi putin poza (al treilea meniu, cel cu casute --> color saturation) ca sa nu iasa in evidenta cosurile foarte rosii.
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