GLOSSARY
BRIGHTNESS | The lightness or darkness of the image. |
CHANNEL | The component of an image. Your scanned image |
| has three channels: red, green, and blue (RGB). |
CONTRAST | The gradation of shades in an image. A high |
| contrast image has very dark areas and bright areas |
| without many middle shades. A low contrast image |
| has many tones that are close to the same |
| brightness. Low contrast images are often described |
| as looking ‘flat’. |
CROP | To trim and delete the unwanted edges of the |
| image. |
DPI | Dots (pixels) per inch. |
EMULSION SIDE | The side of the film coated with the photographic |
| material. |
GAMMA | The contrast of only the middle tones. |
HIGHLIGHTS | The lighter areas of the image. |
HISTOGRAM | A graph showing the amount of each level of the |
| 256 brightness levels. |
INTERPOLATION | A form of adding new pixels in an image when |
| resampling up. |
JPEG | The JPEG (Joint Photographic Experts Group) |
| compression standard is capable of producing a |
| high compression ratio while maintaining image |
| quality. JPEG is a widely supported image file |
| format. |
MIDTONE | The middle shades of an image, in between light |
| and dark. |
NEUTRAL | Having no color cast, such as black, white, or gray. |
PICT | (Macintosh operating system only) The PICT graphic |
| file format uses a lossless compression scheme and |
| is compatible with many Macintosh applications. |
PIXEL | Abbreviation for picture element. The dots that make |
| up an electronic image. |
Dimâge Scan Dual II | 99 |
