Scan Mode
Any one of the various methods used to reproduce image data. Scan modes are distinguished by the number of bits used to describe each pixel.
•24 bit Color: assigns 8 bits of data for each color channel (RGB) in each pixel. Each pixel is therefore assigned 24 bits.
•42/48 bitColor: While the Color mode scans at 8 bits per RGB channel, this mode scans at 14 or 16 bits per channel to achieve a particularly
•8 bit Grayscale: assigns 8 bits of data to its single color channel. Each pixel is therefore assigned 8 bits.
•14/16 bit Grayscale: While the Grayscale mode scans at 8 bits, this mode scans at 14 or 16 bits to achieve a particularly
•Black and White: assigns 1 bit of data to each pixel.
Scanning
The process of using a scanner to read image data. Scanned data is sent to the computer as image data.
Shadows
The darkest portions of an image scanned in a color or grayscale image mode.
Threshold Value
The dividing value at which a pixel is determined to be either black or white when the image is reproduced as a black and white image. The higher the threshold, the darker the image. The lower the threshold, the brighter the image.
Tone Curve
A function used to adjust image brightness. The tone curve (or gamma curve) is a graphic representation of the relationship of the input from the scanner to the output to the monitor or printer.
Unsharp Mask
A function that sharpens image outlines. Makes an image appear naturally sharper without changing the brightness, contrast or color balance.
White Eyedropper Tool
Tool used to the select the brightest portion of an image in the preview area. Used with the Histogram function to adjust image brightness. When this tool is clicked on the image, all areas that are brighter are set to pure white.
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