Threshold and Dynamic threshold

Threshold enables you to set what level of light or dark to look for on a page. When scanning in black and white, everything on the page is set to either white pixels or black pixels in the final image. If the text on the page is a light color, then the text may be gone in the final image as the scanner will change those light colors to white pixels. The threshold slider lets you set the level of darkness or lightness of the text on the page. Dynamic threshold attempts to evaluate the image and dynamically adjust the threshold level. These options work best for documents that contain only text such as business letters, spreadsheets, reports, etc...

Threshold—move the slider to the left or right to set the level of lightness or darkness for the scanner to leverage from.

For example, if you are scanning a document with gray text, such as hand written pencil notes, move the slider to the right. This tells the scanner that the level to look for is light, and gray pixels are converted to black pixels instead of white. If the overall tone of the original document is dark, such as a colored background that may interfere with detecting black, move the slider left. This tells the scanner that the level to look for is dark, only very dark areas such as text are converted to black pixels.

If you are scanning documents that are in good condition, with black text on a white background, the default threshold option will properly scan the item. This level only needs to be adjusted if the scanned image does not have image clarity similar to the original.

Sensitivity—move the slider left or right to adjust the sensitivity level for dynamic thresholding. This slider is only enabled when Dynamic threshold is selected in the list.

Error diffusion, Bayer, and Halftone pattern

Error diffusion, Bayer, and Halftone patterns are the intentional application of noise (dithering) in the image to help alleviate banding when scanning in binary (black and white) mode. For example, if you scan a color photo in black and white, the image file will have large blocks of black and white and the image barely recognizable. Dithering the image creates a black and white image that is recognizable.

Below is an example of a color scan, a black and white scan without dithering, and a black and white scan with dithering. When the image is scaled down, it may look like a grayscale scan. When the image is at normal size or enlarged you will be able to clearly see the dithering pattern, as shown in the close-up image.

Color scan

Black and White scan

Bayer dither scan

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Xerox 4700 manual Threshold and Dynamic threshold, Error diffusion, Bayer, and Halftone pattern

4700 specifications

The Xerox 4700 is a robust monochrome laser printer designed primarily for high-volume printing environments. This machine stands out due to its impressive speed, reliability, and quality, making it a go-to solution for businesses that need efficient document management capabilities.

One of the main features of the Xerox 4700 is its remarkable printing speed. With the capability of producing up to 120 pages per minute, it ensures that large print jobs are completed quickly without compromising quality. This high-speed performance is complemented by various media handling options, allowing users to print on a range of paper sizes, from standard letterhead to larger formats.

The Xerox 4700 employs advanced laser printing technology, which not only delivers sharp text and clear graphics but also maintains consistency across different print runs. The printer utilizes a high-capacity toner cartridge that can yield a significant number of pages, minimizing the frequency of toner changes and reducing operational costs.

In terms of connectivity, the Xerox 4700 is equipped with multiple options. Standard USB connectivity allows for straightforward direct connections, while optional network interfaces, such as Ethernet and Wi-Fi, enable seamless integration into various office setups. The printer supports various protocols, including TCP/IP, making it easy to incorporate into existing network architectures.

Additionally, the Xerox 4700 supports a suite of advanced printing solutions. Features such as Secure Print, which ensures sensitive documents are only printed when the user authenticates, enhance security in busy office environments. The printer also supports duplex printing, allowing for automatic double-sided printing, promoting paper savings and eco-friendly practices.

The user interface of the Xerox 4700 is designed for efficiency. With a clear and intuitive control panel, users can navigate through settings quickly, minimizing downtime. The printer also includes a full range of management features, providing administrators with tools to monitor usage, configure network settings, and perform maintenance tasks.

Overall, the Xerox 4700 is an ideal choice for organizations that require high-performance printing without sacrificing security or quality. Its combination of speed, efficiency, and advanced features makes it a valuable asset in any busy office environment, solidifying its reputation as a reliable workhorse in the realm of monochrome printing.