HP s300 HP s300 Digital Camera - User Manual - Page 7

Photography Terms and Definitions Terms Auto Exposure Bracketing (AEB) Auto Focus (AF) Album Analog to Digital Converter (A/D or ADC) Aspect Ratio Auto White Balance (AWB) Compression Digital Print Order Format (DPOF) Digital Still Camera (DSC) Dynamic Range Exif/JPEG Exposure Index ISO Speed JPEG OSD Protocol Definitions A simple technique professional photographers use to ensure they properly expose their pictures, especially in challenging lighting situations. When AEB is selected, the camera automatically takes three or more shots with a different exposure for each frame. Auto focus refers to a camera's ability to adjust its configuration in order to focus properly on a subject regardless of whether it is near or far from the camera. Auto focus lenses generally provide vastly superior image quality than do their fixed focus cousins since they do not have to rely on their depth of field. Also known as: "AF", "auto-focus". An end-user created object that is used to logically group data objects according to some user-defined criteria. An album may or may not be a physical folder in a file system. A circuit that converts an analog signal, having a continuously varying amplitude, to a digitally quantized representation using binary output signals. The aspect ratio of a camera is the ratio of the length of the length and width of the display or images. With auto white balance, the camera attempts to determine the color temperature of the light and automatically adjust for that color temperature. Many people just leave the camera set to auto white balance all the time. The process of encoding information using fewer bits cf. image compression, sound file compression. A standardized ASCII file created in a digital camera and stored on removable media along with the image files that indicate how many copies of which images should be printed. It also allows index prints, cropping, and text overlays to be specified. A camera incorporating an image sensor which outputs a digital signal representing a still picture, or records a digital signal representing a still picture on a removable medium, such as a memory card or magnetic disk. Dynamic range in photography describes the ratio between the maximum and minimum measurable light intensities (white and black, respectively). A compressed file format for digital cameras in which the images are compressed using the baseline JPEG standard, described in ISO 12234-2, and metadata and thumbnail images are stored using TIFF tags within an application segment at the beginning of the JPEG file. A numerical value that is inversely proportional to the exposure provided to an image sensor to obtain an image. Images obtained from a camera using a range of exposure index values will normally provide a range of image quality levels. A numerical value calculated from the exposure provided at the focal plane of an electronic camera to produce specified camera output signal characteristics using the methods described in the referenced standard. The ISO speed should correlate with the highest exposure index value that provides peak image quality for normal scenes. Joint Photographic Experts Group. An image compression method defined in ISO/IEC 10918-1. The display on the LCD screen is called the On Screen Display or OSD. Defined mechanisms for exchanging data between devices. 3