Epson ES-300C User Manual - Page 40
Halftoning Mode, your output device can reproduce only 1 to 2 bits/pixel/color image
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Using the Scanner Functions Monochrome mode (standard) Use this mode when you want to scan a black and white image. If you scan a color image in monochrome, you may need to specify a dropout color to recover or delete detail. See Dropout color below. Standard monochrome scanning uses all three lamps so that the original image is scanned with white light, thus minimizing the dropout color. Dropout color (monochrome scanning only) Use this mode when you scan a color image in monochrome and you need to recover detail, eliminate background color, or eliminate unwanted detail. Dropout color is the color that is not recognized by the scanner. You can choose either green, red, or blue, depending on the colors on the original images. Halftoning Mode Halftoning is a digital process which simulates continuous gray tones or continuous colors. Some printers, however, cannot print these continuous tones. Halftoning is suitable for original images, such as photographs, that have continuous tones. Use halftoning if your output device can reproduce only 1 to 2 bits/pixel/color image data. Note: Avoid changing the size of a halftoning processed image with your application software. Use the scanner's zoom function instead to select the desired image size. You can enable or disable the halftoning process itself, and select from the three halftoning modes, A, B, or C. Using the Scanner 2-15