White Balance and color temperature

White balance is the process of removing unrealistic color casts, so that objects which appear white in person are rendered white in your photo. Proper camera white balance has to take into account the "color temperature" of a light source, which refers to the relative warmth or coolness of white light.
http://www.cambridgeincolour.com/tutorials/white-balance.htm


incorrect white balance


correct white balance

Color temperature describes the spectrum of light which is radiated from a "blackbody" with that surface temperature. A blackbody is an object which absorbs all incident light-- neither reflecting it nor allowing it to pass through. A rough analogue of blackbody radiation in our day to day experience might be in heating a metal or stone: these are said to become "red hot" when they attain one temperature, and then "white hot" for even higher temperatures. Similarly, blackbodies at different temperatures also have varying color temperatures of "white light." Despite its name, light which may appear white does not necessarily contain an even distribution of colors across the visible spectrum:

http://www.cambridgeincolour.com/tutorials/white-balance.htm

Environmental portrait and others

An environmental portrait is a picture with a person in their normal environment, like at their home or workplace, and typically illuminates the subject's life and surroundings.


http://www.myphototricks.com/uploaded_images/eric-733309.jpg


OTHER PORTRAITS!!!!

Some other types of portraits are candid, posed, formal, couple, sporting, children, and groups.

CANDID
The subject is aware of you and your camera or a travel shot but may also include street or cafe photography.



POSED
Posed means that the photograph has communicated with the subject by word or body language that they desire a change of body position or expression. Its also means that whatever the photographer gets the subject to do in front of the camera.



FORMAL
A formal portrait is planned out. It might be a birthday, school portrait,dance photos or wedding pictures.




COUPLE
Its a portrait with more than one person as the main focus.



GROUP
A picture with anywhere from 3 to several hundred people. These pictures tend to be sports, wedding, family, business portraits.



SPORTING
Its shows the subject with their uniform, equipment in their sporting environment. The important part is to let the equipment and location tell part of the story.


http://www.npg.org.uk/live/images/sportcon.jpg

CHILDREN
The portraits normally fit into the categories of posed or candid aware.




All information provided by http://www.wildheart.com.au/public_panel/learn_photography_
now_page_files/portrait_photography/page8_types_of_portraits.php