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> Fotografia digitala si tehnica, tot ce tine de tehnica facutului de poze si de prelucrarea pozelor dig
kalua
post Mar 28 2008, 05:44 PM
Post #1





Musafir






M-a inspirat Ariana si m-am apucat sa citesc despre cum se fac poze. (IMG:style_emoticons/default/smile.gif)

La carte scrie ca formatul raw este pentru o mult mai flexibila prelucrare a pozelor. Mie una nu-mi prea place sa le prelucrez, ori ies bine de la mama lor, ori le arunc. Trebuie sa-mi mai bat capul cu formatul asta?
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pescarush
post Mar 28 2008, 06:32 PM
Post #2





Musafir






Ma bag si eu, pentru ca, desi nu stiu mai nimic despre asta, ma pasioneaza fotografia. Nici eu nu am prelucrat pozele pana acum, dar probabil ca voi incepe, cand voi avea un aparat mai performant. Acum, cel vechi este stricat, asa ca il astept pe cel nou. (IMG:style_emoticons/default/biggrin.gif)
Interesant ce-am citit aici la voi despre formatul raw, trebuie sa ma apuc sa mai caut despre asta.
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Master of Norule...
post Mar 28 2008, 09:13 PM
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A RAW file contains only the original, unprocessed picture data from your camera's image sensor. It's what the camera recorded without any modifications -- no fixed white balance, no sharpening, no contrast adjustment, no noise reduction. What's more, a RAW file is either uncompressed or only slightly squeezed with lossless compression, meaning that absolutely no actual picture information is thrown away. The RAW format also stores brightness data at 12 bits per color, just as the sensor recorded it, rather than JPEG's eight bits. That means it captures significantly more tonal information.

In essence, a RAW file is of intrinsically higher quality than a JPEG. It allows you to make major changes to an image after you've shot it and still retain good quality. And in working with RAW, you never modify the original file. But -- and this is a big but -- that file requires two to ten times more storage space than a JPEG.
The biggest advantage of RAW is that it gives you 12 bits of brightness data to work with, both in the RAW software itself and when you save the file to a 16-bit TIFF or PSD. Those 12 bits translate to 4,096 discrete levels of brightness -- 16 times the 256 levels available in a JPEG's limited eight-bit space. This is critical if you need to alter brightness in any significant way. The two darkest exposure zones in a 12-bit RAW file contain 384 levels of brightness; in the eight-bit JPEG, only 47 levels. If you decide to open up those shadows in a JPEG, you'll end up with abrupt jumps between the brightness levels. These appear as visible gaps in the histogram display. But an identical adjustment to the RAW file will cause no problems, because there are more than enough levels to ensure smooth transitions.



This post has been edited by misssn7: Mar 28 2008, 09:18 PM
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Cleo
post Mar 29 2008, 03:13 PM
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- Picasa a lui google este cel mai ieftin editor de fotografii pt ca e gratuit (IMG:style_emoticons/default/tongue.gif) insa dupa editare: reducerea dimensiunii, modificarea luminozitatii, contrastului etc calitatea pozei se deterioreaza in opinia mea. am senzatia ca pixelii devin vizibili

- editorul grafic Photoshop-ul este mult mai sofisticat adica joaca de-a editatul devine o placere cu rezultate grozave.
De exemplu pt a obtine un efecte `dreamy' se incepe din sectiunea Layer unde se va face un duplicat la poza originala apoi din menu Filter -> Blur -> Gaussian Blur. Valoarea aleasa pentru Radius nu este una standard, orice valoare care face imaginea destul de neclara pentru a nu mai distinge detalii, se poate apoi ajusta contrastul desi nu e obligatoriu.
Eu nu am inca photoshopul dar o sa-l achizitionez cu siguranta.

un ex de inainte si dupa, fotografiile sint pt exemplificare si sint preluate de pe internet

(IMG:http://i33.photobucket.com/albums/d90/h_2004/inainte.jpg) ;(IMG:http://i33.photobucket.com/albums/d90/h_2004/dupa.jpg)
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kalua
post Mar 29 2008, 03:22 PM
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Musafir






Eu am photoshopu'. (IMG:style_emoticons/default/nesigur.gif)
M-am enervat aseara, eu sunt cu fizica la pamant, l-am intrebat ceva pe Mr. kalua si ceea ce i se pare lui la mintea cocosului e pentru mine fizica nucleara. (IMG:style_emoticons/default/mad.gif) Si-a inceput sa butoneze la aparat, uite ce usor, bla-bla, iar eu intelegeam numai Bahnhof. Si vreau sa va spun ca el nu s-a ocupat vreodata de fotografie sau sa fi luat macar cartea aparatului la citit. Nu-i fair! (IMG:style_emoticons/default/mad.gif)
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Master of Norule...
post Mar 29 2008, 04:12 PM
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Fiecare cu talentul lui Kalua nici el poate nu stie sa faca o gramada de lucruri care tu le faci bine so nu-i un capat de tara.
Mie de ex. imi place sa citesc documentatie si o si inteleg despre diverse chestii tehnice care ma intereseaza daca ma aude cineva din outside zice poate ca sunt cu capul. Sunt inclinata spre tehnic desi sunt femeie dar sa ma pui sa scriu la liber nus daca as reusii.
Scuze de off topic.

This post has been edited by misssn7: Mar 29 2008, 04:14 PM
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Cleo
post Mar 29 2008, 04:28 PM
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kalua pai vezi la explicatiile pe care le-am scris ca de fapt nu te joci cu originalul ci cu o copie.
Cand ai chef si timp experimenteza.
Eu asa am distrus (IMG:style_emoticons/default/laugh.gif) cateva poze cu Picasa si Kodak easyshare (seamana cu Picasa dar e o idee mai complex) si-apoi m-am invatat.
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kalua
post Mar 29 2008, 04:37 PM
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Musafir






Am citit, cleo. Asta mi-e clar (ca se prelucreaza o copie).
Pe mine ma intereseaza acum facutul pozelor, prelucratul deloc (deocamdata).
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Cleo
post Mar 29 2008, 04:59 PM
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(IMG:style_emoticons/default/laugh.gif) e perfect si-asa
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Master of Norule...
post Mar 31 2008, 05:36 PM
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Pun un link tot despre raw mi-ati bagat un pitic, care acum isi face damblaua (IMG:style_emoticons/default/tongue.gif) . Cine are rabdare sa citeasca, interesant ce scrie pe acolo.
http://www.cambridgeincolour.com/tutorials...file-format.htm
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