digi photo midterm
Terms in this set (25)
materials and tools used to create a work of art
in photography, the circular hole in the front of the camera lens which controls the amount of light allowed to pass on to the film from the lens. On all but very inexpensive cameras the size of the aperture is variable. The degree of variability is indicated by "f" numbers (f/stop)
Depth of Field
in photography, the distance between the nearest point and the farthest point in the subject which is perceived as acceptably in focus along a common image plane
practicing describing, analyzing, interpreting, and evaluating art overall.
an electronic device used to capture and store photographs electronically instead of using photographic film like conventional cameras.
Used to refer to the standard they developed for still-image compression. Excellent file format for photographs used as Web graphics. Photoshop allows them to be saved at various quality settings — lower settings requiring less memory, permitting speedier downloading.
a single point in a graphic image. Short for picture element.
allows you to see the external objects while holding the camera away from you. Sometimes this can show a more accurate reading of how the image will be cropped or the depth of field.
(MP) is one million pixels, and is a term used not only for the number of pixels in an image, but to express the number of image sensor elements of digital cameras or the number of display elements of digital displays.
a device which holds the digital information to construct an image. They offer high re-recordability, power-free storage, small form factor, and rugged environmental specifications.
In digital imaging, the number of pixels, in both height and width, making up an image. The higher the resolution of an image, the greater its clarity and definition. The resolution for Web graphics is typically 72 dpi, way too low for print purposes.
A series of convex- and concave-shaped glass elements used to produce undistorted image on film plane or charged coupled device (digital camera).
The window on the back of a camera that allows the photographer to see external objects to be photographed.
This triggers automatically in low light conditions when set to auto mode. It is a device that produces an instantaneous flash of light (1/1000 of a second) at a color temperature to help illuminate a scene. Usually, this is when a scene does not have enough available light to adequately expose the photography.
uses the electronic devices to record the image as binary data. This facilitates storage and editing of the images on personal computers, and also the ability to show and delete unsuccessful images immediately on the camera itself.
The CCD is an array (grid) of light-sensitive diodes. When light strikes the diodes, an electrical charge is generated. This charge is converted to digital value (each digital value corresponds to a color). Digital data is then compressed and stored on a memory card. The CCD is then reset for the next photo to be taken.
Shutter Release Button
A mechanism that, when pushed down, causes the focal plane shutter to open & expose the film or the CCD.
a method of decreasing (narrowing) the apparent angle of view of a digital photographic or video image.
a portable three-legged frame, used as a platform for supporting the weight and maintaining the stability of some other object. The word comes from the Greek tripous, meaning "three feet". A tripod provides stability against downward forces, horizontal forces and moments about the vertical axis.
the clear and sharply defined condition of an image; the position of a viewed object or the adjustment of an optical device necessary to produce a clear image: in focus; out of focus.
One is likely to hear a photographer say something like, "Open up that aperture" or "Bring it down one stop." These phrases refer to the same thing: the f-stop. The f-stop is a term for a measurable expression of how much light is entering a camera lens - the aperture.
data storage that comes in the form of computer chips, and the word storage is used for memory that exists on disks or cards.
The undesirable effect in flash photography of people appearing to have red eyes, caused by a reflection from the retina when the flashgun is too near the camera lens.
A unit of computer memory or data storage capacity equal to one million bytes.
a printed picture produced from a photographic negative or digital image.
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