In recent years, with the continuous development of computer technology, display cards, and RAMs, the bottleneck restricting the development of scanners has been broken through. With the advent of the multimedia information era, the application fields of scanners have gradually expanded, regardless of office applications, home entertainment, etc. Scanners can be seen in multimedia production or internet applications. At present, the average ratio of global scanners to PCs is as high as 20%. The popularity of scanners in China is also growing at a geometric rate, especially in the commercial office area. Computers, printers and copiers are equipped with the most important image input tool scanners in the entire information flow, and together constitute the main body of office automation equipment. In the face of different brands of different types of nearly 100 kinds of scanners on the market, commercial users first start with their own needs, serious technical trends, can not blindly pursue high-end and high prices, causing unnecessary waste.
Understand your own needs
The demand of users for commercial scanners mainly comes from three aspects:
The first is to convert the paper carrier file into an electronic file for storage, search and modification, which is what we commonly call the OCR function (optical character recognition). In OCR applications, scanners with an optical resolution of 300 dpi are generally sufficient, but 300 dpi products are gradually withdrawing from the market. Considering future maintenance services and scanning speeds, it is clear that we should choose higher specification products.
Secondly, the graphics and image files are scanned into the computer. Due to the uneven quality of the source files, the scanner should have an automatic repair function to obtain higher quality graphic image files during the scanning process. The 1200dpi CCD scanner, which sells for around 1800-2500 RMB, is currently the mainstream product in the commercial market. It is more than enough to satisfy the above scanning requirements. Currently, the optical resolution of MICROTEK's mainstream business scanners has reached 1200dpi.
Finally, the use of scanned graphic image files for office publishing, such as the company's internal newspapers and magazines, this application requires a higher level of graphics image clarity. If users want to create their own advertising color pages in the office, in addition to 1200dpi and 42bit resolution and color bits, the dynamic density of the scanner must be taken into account to achieve the effect of printing. Sometimes, even professional pre-press high-grade scanning is required. instrument. This time, 1200dpi optical precision, 420bit color bit, dynamic density of about 3.0 scanner is relatively moderate, the product price is generally around 4000-8000 yuan, such as the MICROTEK ScanMaker 8700 and ScanMaker 4.
The vast majority of scanners can be expanded with optional accessories, such as the use of transmission adapters to add transmissive manuscript scans (MICROTEK dual-platform scanners themselves have scanning transparencies), and the addition of an ADF autofeeder allows the scanner to automatically Paper feeding improves work efficiency. When purchasing accessories, users also need to fully consider the use of the requirements, but do not add it at will. The price of the scanner's functional accessories is very expensive, and sometimes even equal to the price of the scanner itself.
Recognize technology trends
The advantages of the CCD scanning method are obvious. At present, scanners on the market can be classified into CCD (photoelectric coupling sensor) scanners and CIS (contact image scanning) scanners. The former focuses on a CCD through a lens and converts optical signals into electrical signals. Imaging, which is in close contact with the surface of the scanned document for contact scanning. The distance between the scanning manuscript and the scanning platform is called the depth of field. As the contact scanning device CIS has a smaller depth of field, the scanning effect on the original and the uneven original is poor; the CCD scanner directly focuses on the CCD through the lens, so it's The depth of field is much better than the CIS scanner. The development trend of CIS scanners and CCD scanners as predicted by individual manufacturers did not appear in 2000. MICROTEK, which has maintained "China's scanner market share for the first time" for 10 consecutive years, has even stopped the production of CIS scanners. .
The optical resolution and the highest resolution optical resolution are the key factors directly affecting the sharpness of the scanned image, and are also important indicators for judging the quality of the scanner. The unit is dpi (dots per inch). The larger the Dpi value, the larger the scanned image file, the better the scanning effect, and the higher the magnification of the original. The optical resolution is horizontal and vertical. Generally, the lateral resolution is used to determine the accuracy of the scanner because the vertical resolution can be controlled by the stepper motor of the scanner, and the lateral resolution is completely determined by the CCD accuracy of the scanner. When purchasing a scanner, users often see that in addition to the optical resolution, there is a technical indicator called "highest resolution". The highest resolution is not the pixel information actually acquired by the scanner CCD. It is the result obtained by software interpolation calculation. Usually, it only has obvious effect when scanning black and white enlarged manuscripts. Generally, it should not be used as an important reference index. The current scanner still uses the 600dpi product as the mainstream, but 1200dpi has become an inevitable trend.
42 Color Bits Future Trends Color bits are an important technical indicator for the scanner to capture color gradation information. High color bits can get a higher dynamic range, and the color performance is more vivid and realistic. Currently, scanners on the market are mostly 36-bit, but 42-bit scanners can capture 438 billion colors. The information on color gradation is more abundant. Even if a user loses image color information during a series of image processing, it will not Have a great influence on the output effect.
Only the dynamic range greater than 3.0D indicates that the dynamic range, also known as the density value, represents the ability of the scanner to allow a wide range of tonal values, that is, the range from near white to near black. Scanners with good dynamic range can correctly capture levels of various shades and output directly, so that more image details can be obtained. On the contrary, a scanner with a smaller dynamic range cannot detect a tone range with a sufficiently wide range, and cannot distinguish the dark part of the image. It can only sacrifice the details of the bright part and cannot accurately reflect the true color. The scanner's dynamic range is usually from 0.0D to 4.0D. Scanners with greater than 2.0D have better scanning results. Scanners with greater than 3.0D will have excellent scanning results. The dynamic range of the scanner is generally only greater than 3.0D. Out.
Interface Types from USB to IEEE 1394 Scanner interface standards on the market today are mainly SCSI, USB, and IEEE1394. The SCSI interface can achieve 40Mbps transmission speed, but it requires an additional SCSI card worth thousands of dollars in the computer. The cost of the scanner, and the installation is complex, is currently limited to professional users. USB interface, as an emerging industry standard in recent years, has a good performance in terms of transmission speed, ease of use, and computer compatibility. Since its launch in 1999, the market share of the USB interface scanner has reached 35.6%, currently on the market. Most of the scanner products are still based on USB, EPP "dual interface". Recently, the revolutionary IEEE 1394 interface has also entered the stage of the scanner. The IEEE 1394 transmission rate is 33 times that of the USB interface, and it can be between 100, 200, and 400 Mbps between computers and peripherals (respectively. 12.5, 25, and 50 megabytes), which moves a large amount of data, has become the standard configuration for high-end Mac machines and has become increasingly widespread. Based on the many advantages of IEEE 1394, users and markets are eager to adopt this technology scanner product. The MICROTEK ScanMaker 8700, which was recently launched in China, is the world's first scanner product using the IEEE 1394 interface. In addition to the resolution, color location, dynamic density, and interface type, the scanner has a number of additional types of technical indicators to enhance the scanner's ease of use and other features, such as the automatic pre-scan feature in some MICROTEK scanners. "GO" key design, energy-saving design, etc. Although these designs are not important to the above hardware indicators, it is with the help of these functions that the use of scanners can be more handy.
Scanner's accessories
Select scanners, some users often only pay attention to the scanner's hardware specifications, and ignore the random software considerations, in fact, scanners random software rich, practical or not is an important measure of its merits. The software provided with the scanner is provided as a reward and value return that the manufacturer provides to the user. Although their quality does not affect the quality of the scanner, good software can help the user significantly improve work efficiency.
OCR software OCR software Chinese full name is "optical character recognition", when the scanner enters the printed document into the computer, OCR software can automatically identify the printed characters in the document to generate a text file or RTF file, so widely used in text automatically Entry, can greatly reduce the intensity of data entry work, improve the speed of data entry, widely used in electronic publishing, internet resources database and the construction of digital libraries, has made great contributions to the popularity of scanners in China. At present, OCR software on the market generally has functions of Simplified Chinese, Traditional Chinese, English, and Form Recognition, and the recognition rate is mostly about 98%.
The “Book No. 6†that comes with the MICROTEK series of scanners is the only one on the market that supports the mixed recognition of printing fonts such as Song, imitation song, black, cymbal, circular body, Lishu, Liji, Weibei, Xingkai, and Variety. English form OCR software. With the development of software technology, many excellent OCR software functions abroad, such as support for color document input, automatic removal of the background of the document, automatic recognition of the original layout format, will soon appear in the OCR software attached to the scanner.
Image processing software Image processing software has always been considered a patent for the desktop publishing industry, but with the concept of “office printingâ€, the requirements for image processing in business offices are also increasing. If you only need to make daily calendars, invitations, and notices for meetings, image processing software that is easy to use and has many practical templates will be very useful, but if you make professional promotional color pages, you need to use special considerations. The professional image processing software for the effect and curve correction function also has certain requirements for the operator.
In order to meet the special needs of business office, some scanners are also accompanied by document management software and email sending and receiving software. Good document management software can help users significantly improve work efficiency and work quality; with the help of email sending and receiving software, users can share or distribute scanned documents and images to Internet sites via the Internet. Save a lot more than a fax machine.
With the continuous upgrading of computer operating systems and hardware platforms, scanners, which are peripheral products for personal computers, have also achieved non-stop technical progress. As the next development trend of the scanner technology, in a small office, the scanner will gradually get rid of the limitations of the computer to achieve self-scanning, self-printing, self-document storage and other functions. In such a situation, a small office can only meet the needs of all scans with a single scanner, and it can be connected directly to the printer for color copying. MICROTEK ImageDeck's “Sweeping†is the world’s first scanning device that does not require computer control and has both input and output. It has provided the best evidence for the above scenario. At the same time, the sharing of resources and information is particularly important for multinational companies whose offices are located across the country and even around the world. Through Internet and Intranet scanner sharing, users can obtain images (FTP) from the most remote locations in the world. Manuscripts can also be printed directly to a network printer, making scanning a more interactive work, and with the further development and popularity of IPFAX, it will also be possible to fax documents to the other party using a scanner to scan and reuse the network.
Through the above introduction, it is not difficult to see that there are many factors to consider when choosing a commercial office scanner. However, we only need to grasp a standard: to understand the product's cost-effectiveness, and to consider it from the brand to the service, we will be able to purchase a genuinely satisfactory product. Office partner.
Understand your own needs
The demand of users for commercial scanners mainly comes from three aspects:
The first is to convert the paper carrier file into an electronic file for storage, search and modification, which is what we commonly call the OCR function (optical character recognition). In OCR applications, scanners with an optical resolution of 300 dpi are generally sufficient, but 300 dpi products are gradually withdrawing from the market. Considering future maintenance services and scanning speeds, it is clear that we should choose higher specification products.
Secondly, the graphics and image files are scanned into the computer. Due to the uneven quality of the source files, the scanner should have an automatic repair function to obtain higher quality graphic image files during the scanning process. The 1200dpi CCD scanner, which sells for around 1800-2500 RMB, is currently the mainstream product in the commercial market. It is more than enough to satisfy the above scanning requirements. Currently, the optical resolution of MICROTEK's mainstream business scanners has reached 1200dpi.
Finally, the use of scanned graphic image files for office publishing, such as the company's internal newspapers and magazines, this application requires a higher level of graphics image clarity. If users want to create their own advertising color pages in the office, in addition to 1200dpi and 42bit resolution and color bits, the dynamic density of the scanner must be taken into account to achieve the effect of printing. Sometimes, even professional pre-press high-grade scanning is required. instrument. This time, 1200dpi optical precision, 420bit color bit, dynamic density of about 3.0 scanner is relatively moderate, the product price is generally around 4000-8000 yuan, such as the MICROTEK ScanMaker 8700 and ScanMaker 4.
The vast majority of scanners can be expanded with optional accessories, such as the use of transmission adapters to add transmissive manuscript scans (MICROTEK dual-platform scanners themselves have scanning transparencies), and the addition of an ADF autofeeder allows the scanner to automatically Paper feeding improves work efficiency. When purchasing accessories, users also need to fully consider the use of the requirements, but do not add it at will. The price of the scanner's functional accessories is very expensive, and sometimes even equal to the price of the scanner itself.
Recognize technology trends
The advantages of the CCD scanning method are obvious. At present, scanners on the market can be classified into CCD (photoelectric coupling sensor) scanners and CIS (contact image scanning) scanners. The former focuses on a CCD through a lens and converts optical signals into electrical signals. Imaging, which is in close contact with the surface of the scanned document for contact scanning. The distance between the scanning manuscript and the scanning platform is called the depth of field. As the contact scanning device CIS has a smaller depth of field, the scanning effect on the original and the uneven original is poor; the CCD scanner directly focuses on the CCD through the lens, so it's The depth of field is much better than the CIS scanner. The development trend of CIS scanners and CCD scanners as predicted by individual manufacturers did not appear in 2000. MICROTEK, which has maintained "China's scanner market share for the first time" for 10 consecutive years, has even stopped the production of CIS scanners. .
The optical resolution and the highest resolution optical resolution are the key factors directly affecting the sharpness of the scanned image, and are also important indicators for judging the quality of the scanner. The unit is dpi (dots per inch). The larger the Dpi value, the larger the scanned image file, the better the scanning effect, and the higher the magnification of the original. The optical resolution is horizontal and vertical. Generally, the lateral resolution is used to determine the accuracy of the scanner because the vertical resolution can be controlled by the stepper motor of the scanner, and the lateral resolution is completely determined by the CCD accuracy of the scanner. When purchasing a scanner, users often see that in addition to the optical resolution, there is a technical indicator called "highest resolution". The highest resolution is not the pixel information actually acquired by the scanner CCD. It is the result obtained by software interpolation calculation. Usually, it only has obvious effect when scanning black and white enlarged manuscripts. Generally, it should not be used as an important reference index. The current scanner still uses the 600dpi product as the mainstream, but 1200dpi has become an inevitable trend.
42 Color Bits Future Trends Color bits are an important technical indicator for the scanner to capture color gradation information. High color bits can get a higher dynamic range, and the color performance is more vivid and realistic. Currently, scanners on the market are mostly 36-bit, but 42-bit scanners can capture 438 billion colors. The information on color gradation is more abundant. Even if a user loses image color information during a series of image processing, it will not Have a great influence on the output effect.
Only the dynamic range greater than 3.0D indicates that the dynamic range, also known as the density value, represents the ability of the scanner to allow a wide range of tonal values, that is, the range from near white to near black. Scanners with good dynamic range can correctly capture levels of various shades and output directly, so that more image details can be obtained. On the contrary, a scanner with a smaller dynamic range cannot detect a tone range with a sufficiently wide range, and cannot distinguish the dark part of the image. It can only sacrifice the details of the bright part and cannot accurately reflect the true color. The scanner's dynamic range is usually from 0.0D to 4.0D. Scanners with greater than 2.0D have better scanning results. Scanners with greater than 3.0D will have excellent scanning results. The dynamic range of the scanner is generally only greater than 3.0D. Out.
Interface Types from USB to IEEE 1394 Scanner interface standards on the market today are mainly SCSI, USB, and IEEE1394. The SCSI interface can achieve 40Mbps transmission speed, but it requires an additional SCSI card worth thousands of dollars in the computer. The cost of the scanner, and the installation is complex, is currently limited to professional users. USB interface, as an emerging industry standard in recent years, has a good performance in terms of transmission speed, ease of use, and computer compatibility. Since its launch in 1999, the market share of the USB interface scanner has reached 35.6%, currently on the market. Most of the scanner products are still based on USB, EPP "dual interface". Recently, the revolutionary IEEE 1394 interface has also entered the stage of the scanner. The IEEE 1394 transmission rate is 33 times that of the USB interface, and it can be between 100, 200, and 400 Mbps between computers and peripherals (respectively. 12.5, 25, and 50 megabytes), which moves a large amount of data, has become the standard configuration for high-end Mac machines and has become increasingly widespread. Based on the many advantages of IEEE 1394, users and markets are eager to adopt this technology scanner product. The MICROTEK ScanMaker 8700, which was recently launched in China, is the world's first scanner product using the IEEE 1394 interface. In addition to the resolution, color location, dynamic density, and interface type, the scanner has a number of additional types of technical indicators to enhance the scanner's ease of use and other features, such as the automatic pre-scan feature in some MICROTEK scanners. "GO" key design, energy-saving design, etc. Although these designs are not important to the above hardware indicators, it is with the help of these functions that the use of scanners can be more handy.
Scanner's accessories
Select scanners, some users often only pay attention to the scanner's hardware specifications, and ignore the random software considerations, in fact, scanners random software rich, practical or not is an important measure of its merits. The software provided with the scanner is provided as a reward and value return that the manufacturer provides to the user. Although their quality does not affect the quality of the scanner, good software can help the user significantly improve work efficiency.
OCR software OCR software Chinese full name is "optical character recognition", when the scanner enters the printed document into the computer, OCR software can automatically identify the printed characters in the document to generate a text file or RTF file, so widely used in text automatically Entry, can greatly reduce the intensity of data entry work, improve the speed of data entry, widely used in electronic publishing, internet resources database and the construction of digital libraries, has made great contributions to the popularity of scanners in China. At present, OCR software on the market generally has functions of Simplified Chinese, Traditional Chinese, English, and Form Recognition, and the recognition rate is mostly about 98%.
The “Book No. 6†that comes with the MICROTEK series of scanners is the only one on the market that supports the mixed recognition of printing fonts such as Song, imitation song, black, cymbal, circular body, Lishu, Liji, Weibei, Xingkai, and Variety. English form OCR software. With the development of software technology, many excellent OCR software functions abroad, such as support for color document input, automatic removal of the background of the document, automatic recognition of the original layout format, will soon appear in the OCR software attached to the scanner.
Image processing software Image processing software has always been considered a patent for the desktop publishing industry, but with the concept of “office printingâ€, the requirements for image processing in business offices are also increasing. If you only need to make daily calendars, invitations, and notices for meetings, image processing software that is easy to use and has many practical templates will be very useful, but if you make professional promotional color pages, you need to use special considerations. The professional image processing software for the effect and curve correction function also has certain requirements for the operator.
In order to meet the special needs of business office, some scanners are also accompanied by document management software and email sending and receiving software. Good document management software can help users significantly improve work efficiency and work quality; with the help of email sending and receiving software, users can share or distribute scanned documents and images to Internet sites via the Internet. Save a lot more than a fax machine.
With the continuous upgrading of computer operating systems and hardware platforms, scanners, which are peripheral products for personal computers, have also achieved non-stop technical progress. As the next development trend of the scanner technology, in a small office, the scanner will gradually get rid of the limitations of the computer to achieve self-scanning, self-printing, self-document storage and other functions. In such a situation, a small office can only meet the needs of all scans with a single scanner, and it can be connected directly to the printer for color copying. MICROTEK ImageDeck's “Sweeping†is the world’s first scanning device that does not require computer control and has both input and output. It has provided the best evidence for the above scenario. At the same time, the sharing of resources and information is particularly important for multinational companies whose offices are located across the country and even around the world. Through Internet and Intranet scanner sharing, users can obtain images (FTP) from the most remote locations in the world. Manuscripts can also be printed directly to a network printer, making scanning a more interactive work, and with the further development and popularity of IPFAX, it will also be possible to fax documents to the other party using a scanner to scan and reuse the network.
Through the above introduction, it is not difficult to see that there are many factors to consider when choosing a commercial office scanner. However, we only need to grasp a standard: to understand the product's cost-effectiveness, and to consider it from the brand to the service, we will be able to purchase a genuinely satisfactory product. Office partner.
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