Canon CanoScan FB 630U User Manual - Page 77
Modes: Color, High Definition Color, Grayscale, Text Enhanced, and, Low contrast, Mid-point, Mid-tone
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Glossary Top Page Glossary Contents Index Low contrast An image that has low contrast does not have many distinct differences between tones. Mid-point The midtone portion of the image scanned as Color or Grayscale. When you click on the image with the Mid-point eyedropper, all tones between the black-point and the white-point are adjusted in relation to the mid-point setting. Mid-tone Mid-tones are the middle range of tones in an image, between highlights and shadows. Midtones can be adjusted for color and grayscale images with the Gamma tool. Mode The type of scan used to scan an image, differentiated by the number of bits per pixel. ScanGear CS has the following Scan Modes: Color, High Definition Color, Grayscale, Text Enhanced, and Black and White. Moiré reduction Moiré reduction can be switched on with the Descreen button on the Scanner sheet. Moiré patterns are caused by poor dithering as a result of scanning images from published materials like newspapers, magazines, books, etc. When the Descreen feature is on, moiré reduction smooths the overall appearance of the image and enhances image quality. 77