TIFF File Format Tagged Image File Format. One of the most common graphic file formats for line-art and photographic images. Tone Compression A term used in scanning and image editing that refers to compressing the broad range of tones and colors in an image down to the narrower range available on a printing press. A term for an adjustment available in image editing software. The lower left end of the curve typically represents the dark portions of a picture and an upward bend will typically lighten the shadows.
Similar capabilities exist by working with the middle or highlight parts of the curve.
In this way it is possible to alter only certain tone ranges of an image without making un-wanted changes in other parts of the image. A command found in some image editing software to help calibrate the image files to correctly output on an imagesetter. This adjustment is typically left alone, and instead, the imagesetter itself is calibrated. See also Linearization. UCR Under Color Removal.