Kodak 861 2459 User Guide - Page 61
Contrast, Manual, Threshold, Lighten, Normal, Darken, threshold. Lighten = 72
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Contrast % sets the image contrast by adjusting the difference between black-and-white, thereby making an image sharper or softer. Contrast is only available for binary images. In a low contrast setting, the difference between black-and-white is small, so the image is softer. In a high contrast setting, the difference between black-and-white is large, so the image is clearer. Select a contrast value from 1 to 100. The default is 50. Contrast 1 Contrast 60 Contrast 100 Manual is always selected for binary images. Adjust the Contrast setting by dragging the Contrast sliding bar to the left or right to achieve the desired Contrast setting. Scan the document to check the contrast. Threshold thresholding is used to convert a grayscale image into a binary (1 bit/pixel) image. The thresholding value ranges from 0 to 255. The default is 90. A low threshold value will produce a lighter image, and can be used to subdue backgrounds and subtle, unneeded information. A high threshold value will produce a darker image, and can be used to help pick up faint images. Adjust the Threshold setting by dragging the Threshold sliding bar to the left or right to achieve the desired Threshold setting. Scan the document to check the threshold. 200 dpi; 80 Threshold; 20 Contrast 200 dpi; 80 Threshold; 100 Contrast Lighten, Normal and Darken are used as quick sets to adjust the threshold. Lighten = 72, Normal = 90 and Darken = 128. 58 A-61512 May 2006