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Xerox 721P87491 manual Scan resolution and scaling, Scaling and resolution example

Models: 721P87491

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POSTSCRIPT

the image relative to the PostScript default image and user coordinate systems.

Scan resolution and scaling

Just as rotation of an image is often required to produce correct output, scaling is also often required. To reduce imaging time, present the data so that scaling is not required; supply data for 300 dots per inch of output size in both dimensions.

Part of the image-to-user space transformation for any image is the scaling that takes image coordinates to physical coordinates in user space. DocuPrint splits the transformation into two parts. The scale operator is needed as part of the transformation from the unit square in user space (1 unit equals 1 point, which equals 1/72 inches) to the destination rectangle or parallelogram.

In the following example, the number of samples in each dimension is divided by the input resolution, giving the size of the image in inches, which is multiplied by 72 to obtain the size in points. The two computed values are used as scale factors to take the unit square to the size of the original image.

Figure 2-11.Scaling and resolution example

/lines 3296 def

% lines in

the image

/bpl 2528 def

% bits per

line

/res 300.0 def

% spots per inch of image resolution

.

 

 

.

 

 

.

 

 

bpl res div 72 mul lines res

div 72 mul scale

As with rotation, the image-to-user space transformation specifies the output size of the image, and internal scaling may or may not be required, depending on the data available. In the scaling and resolution example above, 300 samples per inch of output size were provided, and output scaling is not required.

Common cases of scaling are optimized to minimize the performance penalty. See “Performance measurement” in the Troubleshooting Guide. Recognition of optimized cases is dependent upon precise scale values. For this reason, you should always have the scale values calculated by the PostScript code as shown in the examples. Optimized scaling works well with optimized rotations.

The following example illustrates the requirements for embedding and printing an image in a normal scan.This example uses the default PostScript user coordinate system. The image data is already in the correct order for that coordinate system, so the use of the rotate operator is not required. DocuPrint NPS performs an internal rotation of the image data in order to align it properly with the print scan ordering. Three hundred samples per square inch of output size is provided and scaling is not required.

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XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES

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Xerox 721P87491 manual Scan resolution and scaling, Scaling and resolution example
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721P87491 specifications

The Xerox 721P87491 is a remarkable printing device that showcases advanced technology tailored for professional environments, ensuring high-quality output and efficiency. Aimed at meeting the demands of busy offices, this model is recognized for its reliability and innovative features.

At the core of the Xerox 721P87491's appeal is its robust printing capabilities. It offers an impressive resolution, enabling the production of crisp and clear documents, whether in black and white or color. This high-resolution output is particularly essential for businesses that require detailed graphics, intricate charts, or professional-grade presentations.

One of the standout features of the Xerox 721P87491 is its impressive speed. It is designed to handle high-volume printing, significantly enhancing productivity in fast-paced work environments. With a rapid print speed per minute, users can expect swift processing of print jobs, ensuring that document delivery times are minimized.

The device also boasts advanced connectivity options. It supports both wired and wireless connections, allowing for seamless integration into a variety of office networks. This flexibility facilitates printing from multiple devices, including desktop computers, laptops, and mobile devices, enhancing overall workflow and collaboration within teams.

Additionally, the Xerox 721P87491 incorporates user-friendly interface options. With an intuitive touchscreen display, navigating the printer's functions becomes simpler. Users can easily access common features, adjust settings, and manage print jobs efficiently.

Another notable characteristic is its advanced security features. Given today's emphasis on data protection, the Xerox 721P87491 is equipped with robust security protocols to safeguard sensitive documents. It includes features like secure print, which holds documents until the authorized user enters a PIN, ensuring confidentiality in high-stakes environments.

Moreover, the Xerox 721P87491 demonstrates an emphasis on environmental sustainability. It is designed to be energy efficient, reducing power consumption during both idle and active states. The printer also supports duplex printing, which helps decrease paper use, contributing to a more sustainable office practice.

In summary, the Xerox 721P87491 is a versatile printing solution that merges efficiency, quality, and advanced technology. With high-speed printing, intuitive controls, robust security features, and a commitment to sustainability, it stands out as an excellent choice for businesses aiming to boost productivity while maintaining high standards. Its capabilities make it a worthy investment for any modern office environment.