Gamma, Choosing gamma values | Xerox 4760 manual

Black background scanners:

Some scanners have a black background plate. A black background results in more precise cropping results and skew detection. However, when scanning thin paper, such as carbon copy paper or ruled writing paper, which are less than 18lb paper weight, the background may “bleed” through into the final image and make the image darker than it should be. In that case, try adjusting the brightness level between 40% and 60%, then adjust the contrast level between 60% and 80%.

Gamma

Gamma is the tone curve and starting point for image enhancement. Move the slider left or right to darken or lighten the image. As you raise or lower the Gamma value, the values at which Brightness and Contrast affect the image are changed. It is recommended that you keep the default gamma value, or adjust this setting before adjusting the other options.

Choosing gamma values

As the gamma value is adjusted lower, the tone curve begins to straighten and the shadows of the image are expanded, darkening the shadows without overall darkening the image with gray as seen with lowering the brightness level. This way, the highlights and shadows in the image are maintained by saturating the pixels with darker levels of the same color rather than adding gray to all colors.

As the gamma value is adjusted higher, the tone curve bends and the highlights of the image are expanded, lightening the highlights without overall lightening the image with white as seen with raising the brightness level. This way, the highlights and shadows in the image are maintained by saturating the pixels with lighter levels of the same color rather than just adding white.

Adjusting the gamma level is based on how you want the image to appear and there is no standard to adhere to.

Color image gamma examples

The examples below show the original image at the default setting of 1.8 gamma level, then 1.0 gamma and 2.6 gamma. Adjusting the gamma level does not make the image completely black nor completely white.

Gamma: 1.0

Gamma: 1.8

Gamma: 2.6

Technical note:

Most monitors have a gamma setting that is user adjustable. When viewing scanned images on-screen, versus printing the image, the gamma setting of the monitor may affect how light or dark the scanned image looks when compared to the original. If the scanned image is too different from the original image, or if adjusting the scanned gamma level does not modify the image how you want, try adjusting the monitor's gamma level. Refer to the monitor's user guide for adjusting the gamma level and see if the manufacturer has any recommended settings.

Xerox® DocuMate® 4760	165
User’s Guide

4760 specifications

The Xerox 4760 is a versatile and powerful multifunction printer designed for high-volume environments, offering a robust set of features that cater to the demands of busy offices. This device not only provides superior printing capabilities but also incorporates advanced scanning, copying, and faxing functionalities.

One of the standout features of the Xerox 4760 is its impressive print speed, reaching up to 60 pages per minute (ppm). This efficiency ensures that large print jobs can be completed quickly, allowing businesses to maintain productivity without unnecessary delays. Additionally, the printer offers a maximum paper capacity of up to 8,500 sheets, accommodating various paper sizes and types, which minimizes downtime for paper loading.

The Xerox 4760 utilizes advanced printing technology, including a high-quality LED print engine, which provides sharp, clear text and vibrant images. The resolution can reach up to 1200 x 1200 dpi, ensuring that documents are produced with exceptional detail and clarity. This high-quality output is vital for professional presentations, marketing materials, and other business documents.

In terms of connectivity, the Xerox 4760 supports multiple options, including USB, Ethernet, and Wi-Fi, allowing for seamless integration into any office network. The printer is compatible with various operating systems, making it easy to connect multiple users to the device. Furthermore, it supports mobile printing solutions, enabling employees to print from their smartphones or tablets, thus enhancing convenience and flexibility.

The Xerox 4760 also emphasizes security, with features designed to protect sensitive data. It includes secure print functionality and various user authentication options, ensuring that confidential documents are only accessible to authorized personnel. This is crucial for businesses that need to safeguard proprietary information or comply with regulatory standards.

Additionally, the Xerox 4760 is designed with energy efficiency in mind. It operates with low power consumption, which not only reduces operational costs but also minimizes the environmental impact. The printer meets ENERGY STAR certification standards, demonstrating its commitment to energy-efficient practices.

In summary, the Xerox 4760 is a robust multifunction printer ideal for high-volume printing needs. Its blend of speed, quality, connectivity, security features, and energy efficiency makes it a valuable asset for any business looking to streamline operations and enhance productivity. With the ability to handle large print jobs effectively, the Xerox 4760 remains a top choice in the competitive arena of multifunction printing devices.

Xerox 4760 manual Gamma, Choosing gamma values, Color image gamma examples

Models: 4760