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| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question. |
| dynamic range | |
| —n | |
| the range of signal amplitudes over which an electronic communications channel can operate within acceptable limits of distortion. The range is determined by system noise at the lower end and by the onset of overload at the upper end | |
| Main Entry: | dynamic range1 |
| Part of Speech: | n |
| Definition: | the ratio of a specified maximum possible level of a parameter to the minimum detectable or acceptable value of that parameter, such as the range of an audio signal from its lowest to its highest level |
| Main Entry: | dynamic range2 |
| Part of Speech: | n |
| Definition: | in a digital system or device, the ratio of maximum and minimum signal levels required to maintain a bit error ratio (number of erroneous bits divided by total bits processed) |
| Main Entry: | dynamic range3 |
| Part of Speech: | n |
| Definition: | in a digital image, the number of possible colors or shades of gray that can be included in a particular image |