PSD, which stands for Photoshop Document, is the default format that Photoshop uses for saving data. PSD is a proprietary file that allows the user to work with the images' individual layers even after the file has been saved.
white bal·ancethe color balance on a digital camera.
his·to·grama diagram consisting of rectangles whose area is proportional to the frequency of a variable and whose width is equal to the class interval.
ap·er·turea space through which light passes in an optical or photographic instrument, especially the variable opening by which light enters a camera.
shut·ter speedthe time for which a shutter is open at a given setting.
depth of fieldthe distance between the nearest and the furthest objects that give an image judged to be in focus in a camera.
bit·mapa representation in which each item corresponds to one or more bits of information, especially the information used to control the display of a computer screen.
ex·po·surethe revelation of an identity or fact, especially one that is concealed or likely to arouse disapproval.

"she took her life for fear of exposure as a spy"

synonyms:

uncovering, revelation, disclosure, unveiling, unmasking, discovery,detection; More