Category Archives: Glossary

Newspaper format (paper formats)

A newspaper format describes the standardized dimensions of a newspaper that has not been opened, specified in width by height (in short: W × H). The size refers to the size of the paper side. The print area, however, can vary depending on the newspaper. The width of the columns, too, can vary. Common formats are e.g. B. 45 mm (one column), 90-95 mm (two columns) or 185 mm (four columns).

Newspaper formats vary considerably around the world, not only from country to country but also within a country. In Germany alone there were around 60 different paper formats for newspaper printing in the 1970s. DIN 16604, which was laid down in 1973, was intended to “facilitate cooperation between the advertising industry and newspaper publishers and printing companies when placing advertisements and lead to a uniform usage of language with regard to dimensions.”

In some countries, certain formats are also associated with certain types of newspapers. In Great Britain, for example, a distinction is made between “tabloid” and “broadsheet”, which is also to be assessed as a reference to the quality of the newspaper content, since the tabloid press prefers the tabloid format.

In Germany, on the other hand, the most common formats differ according to their regional origin, such as the Berlin format (315 x 470 mm), the Rhenish format (350 × 510 mm) and the Nordic format (400 × 570 mm).

Due to the high format variability and the different nature of the templates, the digitization of newspapers poses great challenges for scanning systems.

Newspapers can be available as individual editions, but depending on the frequency of publication they are often bound in thick monthly, quarterly or annual volumes, which are extremely heavy and unwieldy.

In order to ensure a productive and at the same time user-friendly scanning process, scanning systems should have short scanning and exposure times as well as user-friendly, motor-driven book cradle and pressure systems that enable ergonomic work.

Related Topics

Book formats

The book format indicates how many sheets a book [...]

READ MORE
Book cradle

The book cradle is a device that facilitates the [...]

READ MORE
DIN formats (paper formats)

The standardized values for paper sizes known today as [...]

READ MORE
Mechanical book cradle 180°

In a mechanical book cradle, the necessary balancing movement [...]

READ MORE

Special formats (paper formats)

Under the unofficial name A4+ (A4 plus), there is an oversize format based on the DIN A4 format that is used in inkjet and laser printers. It is offered to end customers specifically by printer manufacturers and paper suppliers. Due to the lack of standardization of this oversize format, the formats differ somewhat. Some A4-based formats have a uniform bleed of three millimeters per side (216 × 303 mm) and sometimes corresponding tear-off edges. Some (U.S.) suppliers also specify A4+ as 9½ × 13 in (inch/inch) (241 × 330 mm), which is virtually the same as the untrimmed A4U (240 × 330 mm) sheet format from ISO 5457 for technical drawings.

In photographic and commercial printing, the likewise non-standardized oversize format A3+ (A3 plus), also known as Super A3 or Super B, exists accordingly. The dimensions are usually selected so that an A3 page can be printed borderless on a paper manufacturer’s printer.

For the class of 17″ printers (usually referred to as A2 printers), there is an oversize format A2+ (432 × 648 mm), with the 2:3 aspect ratio common for photos. This format is aimed at users who want to use the full width or flatness of their printer. In the 36″ printer class, an oversize format known as E/A0 or A0 big (917 × 1189 mm) is sometimes used, which combines the height of a DIN A0 sheet with a width of approximately 36.1 inches.

RELATED TOPICS

DIN formats (paper formats)

The standardized values for paper sizes known today as DIN formats [...]

READ MORE
Folio format (book formats)

The term folio derives from the Latin word "folium" (leaf) and [...]

READ MORE
Newspaper format (paper formats)

A newspaper format describes the standardized dimensions of a newspaper that [...]

READ MORE

UV light

UV light, also known as ultraviolet radiation or UV radiation, cannot be seen by humans, only felt. Probably the best known natural source of UV light is the sun. Artificially, UV radiation can be generated with the help of mercury vapor lamps and special light sources. UV light is divided into the three categories UV-A, UV-B and UV-C according to its wavelength. The short-wave UV-C light is largely absorbed by the ozone layer and thus does not reach our skin. The UV-B light makes it a little further, but is also rendered harmless by the cloud layers to 90%. UV-A light, on the other hand, is responsible for sunburn, eye damage, skin cancer and far more biological damage.

UV radiation can cause irreparable damage to sensitive works of art, especially works made of paper, such as prints, manuscripts or books. Depending on the duration and intensity of light, exposure starts biochemical processes that accelerate the organic aging process and lead to structural changes in paper, ink and paint. That is why we use only adjustable LED light units in our scanning systems for the most gentle illumination of the originals.

On the other hand, UV light (UV fluorescence) is used in the field of art science as an examination method, e.g. to make surface phenomena or faded inks on works of art, which cannot be perceived by the naked eye, visible by selective excitation with light of certain wavelengths. In this context, we use UV light exclusively in our multispectral system.

Related Topics

Homogeneous light

Homogeneous light, or also homogeneous illumination, refers to [...]

READ MORE
Continuous light

Continuous light is understood in artistic photography as [...]

READ MORE
Photosensitivity

High light intensity, in particular through UV radiation, [...]

READ MORE
LED

LEDs (light-emitting diodes) are energy-saving light sources (ESL). [...]

READ MORE

Megapixel

The term megapixel comes from the field of digital photography and describes the sum of the available image points (pixels) on a sensor. A megapixel stands for 1 million pixels. Basically, it can be said that a high number of megapixels also stands for a higher resolution of the images or scans. However, you have to note that several factors naturally have an influence on both the quality and the resolution. For example, appropriate lenses are necessary in order to be able to bring the quality to the sensor through the optics. It must also be taken into account that the resolution of the scan or the image always depends on the distance between the lens and the original as well as on the focal length, pixel size and the relationship between the sensor format and the original format. Commercially available consumer cameras usually have a possible resolution of 20-30 megapixels.

For our scan systems we only use our in-house developed and produced X71 camera. As the name suggests, this is a camera with a 71 million pixels sensor. In addition, the camera is equipped with a special lens and designed for the highest demands of scanning documents.

Related Topics

Bayer Matrix (Bayer Sensor)

The Bayer matrix is the spatial arrangement of the red, green [...]

READ MORE
DPI

DPI stands for "dots per inch", more precisely the print-dots per [...]

READ MORE
PPI

PPI stands for "Pixel per Inch". It describes the point or [...]

READ MORE

Focus level

We use the term “focus level” to refer to the area of a document or original that lies in the focus of the imaging unit. See also Focus.

By using area sensors in our systems, we reproduce a high depth of field. Therefore, our actual focus level is more of a three-dimensional construct, which allows for a certain degree of tolerance. So, unlike line scanners, for example, our scanners are not reduced to a fixed level.

However, it makes sense to work in the optimal focus level in order to achieve the best possible results. In order for the user to quickly recognize where this level is located, even with originals of different thicknesses or heights, LED lines indicate this area before the scan. Using the book cradle and a motorized height adjustment, the originals can be moved up or down to reduce or increase the distance to the image acquisition unit.

Related Topics

Focus

In physics, the focus describes the point in [...]

READ MORE
Depth of field

The depth of field indicates the range in [...]

READ MORE
Book cradle

The book cradle is a device that facilitates [...]

READ MORE

Book fold optimization

Some books, especially books with a thick spine, have a deep book fold when opened. When viewed from the side or front, the pages are usually very curved, making it difficult to take a true-to-scale and distortion-free image. Since our scanning systems digitize vertically from above and have a high depth of field, no information is lost despite the strong curvature. Only the text may show a slight curvature in the digital copy in such cases. This cannot be changed physically and is independent from the optics used. In order to still obtain an optimal result, our software offers the optional function “book fold optimization”. It recognizes the text and “equalizes” it so that each letter is on a straight line and the text is optimally readable. The deep book fold and the curved text are thus displayed in the best possible way.

Attention: This function is a subsequent image manipulation, which improves the optical perception, but does not match the content of the original. Basically, all our systems are designed to create a color-accurate and true digital copy of the original. Such a subsequent manipulation no longer complies with this principle.

Related Topics

EasyScan scanning software

Our Easy Scan software is the user-friendly interface [...]

READ MORE
Finger removal

Some originals cannot easily be placed open on [...]

READ MORE
OCR

OCR (Optical Character Recognition) is a character recognition [...]

READ MORE

Focus value

To set the acquisition unit to the optimum focal level, our systems offer different approaches. Depending on the original or requirement, individual focusing can thus take place. In addition to motorized autofocus or adjustment with visual support via the video mode, there is also the option of displaying a digital sharpness value.

This value is an unspecified number that becomes visible in the upper left corner of the user interface when activated. The acquisition unit or the optics can now be adjusted to find the focus. This involves a permanent measurement of the contrasts over the entire scan area. The number either increases when the image is sharpened or decreases when the image is blurred and therefore less contrast can be measured.

The goal is to find the “peak”, the point where the number is highest before it gets smaller again. If you reach this peak, you have found the optimal plane of sharpness.

The digital sharpness value is another user-friendly, supporting function for achieving an optimal scan result. It is not subject to subjective decisions, but indicates on a mathematical basis which setting is best suited for the respective original.

Related Topics

EasyScan scanning software

Our Easy Scan software is the user-friendly interface [...]

READ MORE
Focus

In physics, the focus describes the point in [...]

READ MORE
Autofocus

Autofocus is a common feature when taking photos [...]

READ MORE
Motorized focus

Our systems work with a fixed focal length [...]

READ MORE

V lambda curve

The V lambda curve is a luminous efficiency function or luminosity function describing the average spectral sensitivity of the human eye, which it perceives in daylight. The visible spectral range from 380 to 780 nanometers is perceived as light in the human eye.

RELATED TOPICS

LED

LEDs (light-emitting diodes) are energy-saving light sources (ESL). In contrast to conventional light bulbs, LEDs achieve 30-50 times the [...]

READ MORE
Continuous light

Continuous light is understood in artistic photography as an artificial light source that illuminates a motif over a longer [...]

READ MORE
Fresnel lens

This term refers to a one-dimensional lens system that performs corrections in only one dimension. In book2net book scanners, [...]

READ MORE

Motorized focus

What are the advantages of a motorized focus?

Our systems work with a fixed focal length as standard. This has the advantage that there is no permanent change in focus during scanning, as is the case with the autofocus systems of commercially available consumer cameras, for example. Thus, the constant size of the scans is guaranteed and a continuous mechanical wear movement is avoided.

We also equip some of our flexible systems additionally with a motorized focus that can be adjusted to different formats at the push of a button. This ensures that the focus is set correctly for each template without having the disadvantages of a classic autofocus.

Related Topics

Autofocus

Autofocus is a common feature when taking photos with consumer cameras from providers such as Sony, Nikon, or Canon. [...]

READ MORE
Camera slider

For institutions with different originals and especially changing format sizes in their collections, which always want to get the [...]

READ MORE
Depth of field

The depth of field indicates the range in which images are displayed sharply when photographing or scanning. For example, [...]

READ MORE

Machine vision

In addition to conventional and artistic photography, there is the large field of industrial photography, for which special machine vision cameras are designed. This segment has developed very strongly in recent years and has become the innovation engine for sensor technology.

By now, 9 billion sensors are manufactured annually, with growth rates of about 20% per year. With such volumes, competition is intense, as is innovation.

Key features

  • A wide range of different sensors in terms of the number of pixels
  • The demand for fast sensors is growing strongly.
  • The fastest ones can now process 30000 images per second.
  • Only CMOS sensors are used; power consumption and heat generation are much better. Mechanical shutters are no longer necessary.
  • Unlike in artistic photography, emphasis is placed on uniform sharpness over the entire surface.
  • Cost-intensive innovations can only be justified with the corresponding quantities, which only this market makes possible. But these are also made.
  • Machine vision cameras serve only a specific purpose and task.

 

book2net X71 digital camera

Fields of application

  • Security technology, surveillance
  • Automotive industry
  • Production monitoring
  • Scientific photography
  • Cell phones
  • Aerospace
  • Robotics
  • Gaming

Machine vision cameras are generally well-suited for tasks in the cultural sector if equipped appropriately; image quality, performance, and price are in harmony.

The innovation cycles are pleasingly short.

Related Topics

Bayer Matrix (Bayer Sensor)

The Bayer matrix is the spatial arrangement of the red, green [...]

READ MORE
Image sensor / CMOS versus CCD

There are two types of image sensors for industrial cameras on [...]

READ MORE
Megapixel

The term megapixel comes from the field of digital photography and [...]

READ MORE