Manuals / Kodak / Computer Equipment / Scanner

Kodak 9500 manual Evaluating scanned images, Source image types, Scanned images, Printed Images

Models: 9500

1 101
Download 101 pages 52.87 Kb
Page 94
Image 94

Evaluating scanned images

This section describes methods for evaluating digitally scanned

 

images. Evaluating scanned images requires an understanding of

 

how scanned images are created and the types of source

 

documents used to create these images. Image creation and

 

source image types are also discussed in this chapter, as well as

 

various evaluation criteria using a standard target as an example.

Scanned images

A scanned image is a digitized representation of a source image.

 

An image is digitized by viewing the source image and

 

determining a numeric value for each finite area (picture element

 

or pixel) of that image.

 

The size of a pixel is described in dots-per-inch (dpi). As dpi

 

increases, the ability to retain fine "spatial" detail from the source

 

document is increased.

 

The numeric value assigned to a pixel is based on the number of

 

bits-per-pixel. This value is assigned based on the tone of the

 

source document. A black pixel will have a different value than a

 

white pixel. When the number of gray shades increase, the

 

scanner’s ability to retain tonal information increases. For

 

example, 8 bits-per-pixel allows 256 shades (levels) of gray.

 

By increasing dpi and bits-per-pixel, image quality improves, but

 

the digitized image file size increases. In fact, most scanned

 

images are stored as a bi-tonal (single bit-per-pixel) images. A

 

balance must be struck between image quality and file size.

Source image types

There are many types of source documents. Three common

 

types of documents are described in this section. An individual

 

source document can contain more than one source image type.

 

For example, a printed business form may contain computer-

 

generated printing.

 

Printed Images

 

Printed images are those created by a printing press, ink-transfer

 

process. These images contain discrete levels of tone and space.

 

Discrete in tone means that there are a limited number of tone

 

levels (shades of color) in the images. Discrete in space means

 

that image elements are printed by placing ink at specific points.

 

These may be random or patterned locations. Examples of

 

printed images include business forms, newspapers and printed

 

manuals.

 

Font size and line width largely control image quality. The use of

 

halftone printing screens, which are printed using a series of

 

small dots to create lighter colors, can result in scanned image

 

degradation due to aliasing and moiré patterns. (The “Evaluation

 

criteria” section describes aliasing and moiré).

A-61122/A-61124 March 1999

E-21

Page 93 Page 95
Page 94
Image 94
Kodak 9500 manual Evaluating scanned images, Source image types, Scanned images, Printed Images
Page 93 Page 95

9500 specifications

The Kodak 9500 is a sophisticated imaging device designed to revolutionize the way professionals engage with photography and imaging technologies. This innovative product combines cutting-edge technology with user-friendly features to enhance the overall shooting experience, making it a top choice among photographers and videographers alike.

One of the standout features of the Kodak 9500 is its high-resolution sensor, which captures images in stunning detail. With a resolution of up to 50 megapixels, this camera allows photographers to produce exceptionally sharp and vibrant photos, making it an ideal choice for commercial photography, fine art, and even landscape photography. The larger pixel size ensures better performance in low-light conditions, allowing for clearer images without the noise that often plagues other cameras.

The Kodak 9500 also boasts an advanced autofocus system. This system employs phase detection technology, ensuring that subjects are locked in focus quickly and accurately, even in dynamic environments. Whether capturing fast-moving wildlife or bustling street scenes, users can rely on the camera's autofocus capabilities to deliver crisp, clear results every time.

Another key feature of the Kodak 9500 is its versatility in terms of shooting modes. The camera offers a wide range of options, including manual, aperture priority, and shutter priority modes. Additionally, the inclusion of various scene modes enables users to achieve optimal results regardless of their level of expertise. This makes the Kodak 9500 accessible to both beginners and seasoned photographers.

In terms of connectivity, the Kodak 9500 incorporates built-in Wi-Fi and Bluetooth technology, allowing for easy sharing of images and videos. Photographers can transfer their work directly to smartphones or tablets and share them on social media platforms without the need for additional software or wires. This seamless connectivity enhances the workflow for professionals who need to present their work quickly.

The build quality of the Kodak 9500 is another aspect worth mentioning. Constructed with a durable magnesium alloy body, the camera is designed to withstand the rigors of professional use. It is also weather-sealed, making it resistant to moisture and dust, allowing photographers to work confidently in various environmental conditions.

In summary, the Kodak 9500 stands out in the crowded camera market with its high-resolution capabilities, advanced autofocus system, versatile shooting modes, and robust connectivity options. Its durable construction makes it a reliable tool for professionals seeking to capture their vision with precision and clarity. Whether you are a seasoned pro or a passionate enthusiast, the Kodak 9500 is an exceptional choice that elevates the art of photography.