The flatbed scanner can only scan one by one (open cover-put file-put cover-scan-open cover-take file-put file).
The paper-feeding scanner can put a document, scan it automatically and save it automatically (it can be saved as PDF or JPG).
Flat scanner is used for small batch, and paper scanner is used for large batch.
Mainly from these two points, other details can refer to your office partner's information channels, many problem-solving methods and small methods to buy!
How to Choose a Scanner —— Skills of Choosing a Scanner
How to Choose a Scanner —— Skills of Choosing a Scanner
The scanner can input graphics files such as pictures, manuscripts, photos, films and drawings. Enter the computer and copy and send faxes with the printer and modem. As the popularity of scanners has dropped to less than 1,000 yuan, scanners have gradually become indispensable computer equipment for office, engineering design, art design and home users. What performance, grade and brand scanner do you need? Below, I will share the skills of choosing a scanner for you, hoping to help you!
I. Brand
Second, the performance parameters
There are many parameters that describe the performance of the scanner. The following are the technical indicators that ordinary users need to consider when purchasing.
1. scan format
Scanning formats are usually A4, A4 extension, A3, A 1, A0 and other specifications. Large format scanner is expensive, so it is recommended that ordinary family and office users choose A4 format scanner. According to needs, office users can also consider buying scanners with A3 format or even larger format.
Step 2 solve
Resolution reflects the clarity of the scanned image. The higher the resolution of the scanner, the clearer the scanned image. The resolution of the scanner is expressed in dots per inch (dpi). General office users suggest buying a scanner with a resolution of 600× 1200 (horizontal resolution× vertical resolution). The horizontal resolution is determined by the real resolution of the scanner optical system, and the vertical resolution is determined by the accuracy of the scanner transmission mechanism. The horizontal resolution is mainly considered when purchasing.
3. Color numbers
The number of color bits reflects the ability to distinguish the colors of scanned images. The more color bits, the richer the color of the scanned image. The number of color digits is represented by binary digits. For example, an image of 1 bit, each pixel can carry binary information of 1 bit, and only two colors can be produced: black or white. An 8-bit image can give each pixel 8 bits of binary information, which can produce 256 colors. Common scanners have common standards such as 24-bit, 30-bit, 36-bit and 42-bit color bits. It is recommended to buy a scanner with 30-bit color or 36-bit color. 30-bit scanners have become obsolete products, and it is recommended not to buy them.
4. Photosensitive element
The photosensitive element is the eye of the scanner, and the scanning quality is related to the cutting between the scanner and the photosensitive element. The useful photosensitive elements of ordinary scanners are CCD (Charge Coupled Device) and CIS (Contact Imaging Sensor). The scanning technology of CCD photosensitive element has matured.
It is matched with an imaging system consisting of a light source, several mirrors and an optical lens to image on the sensor surface, which has a certain depth of field and can scan uneven objects. CIS is a kind of photosensitive element widely used in fax machines. Its ultimate resolution is about 600DPI, which is far from CCD technology. CIS is only used for low-grade flat-panel scanners.
Third, support software.
The function of scanner must be realized by corresponding software. In addition to the driver and scanning interface, almost every scanner will give away some image editing software, OCR text recognition software and so on.
Different scanning distribution software has different performance and operation methods. For users who are not familiar with graphic processing, it is recommended to choose a scanner with simple operation and convenient use.
Fourth, the interface
Interface refers to the connection mode between the scanner and the computer, such as SCSI interface, EPP interface and USB interface.
The SCSI interface scanner is connected to the computer through the SCSI interface card, and the data transmission speed is fast. Disadvantages are complicated installation, need for expansion slots and limited computer resources (interrupt number and address). If you often scan a large number of drawings, you should choose SISC interface scanner, which can save a lot of time.
EPP interface (printer parallel port) can connect scanners, printers and computers with cables, and the installation is simple. You can connect a laptop. However, its data transmission speed is slightly slower than that of SCSI interface scanner, so it is recommended that users who do not require high scanning speed, do not scan much, and do not often use scanners buy EPP interface scanners.
USB interface scanner is fast, supports plug and play, and is very convenient to connect with computer. However, your computer is required to support USB interface, and it is recommended that qualified users buy USB.
What kind of scanner is good?
Which scanner is better?
With the price reduction of scanners, in addition to printers, scanners have gradually entered offices and homes, becoming indispensable computer peripherals for users. At present, there are many brands of scanners, but I think the really good brands should be Canon, Zhongjing, Ziguang, Epson and BenQ BenQ, all of which are the top ten scanner brands bought on the top ten brand portals. If you buy them, you can rest assured.
What brand of scanner is good?
Well-known brands prefer Epson, followed by Canon. There are also the old brands of domestic MICROSCOPE and scanners, which are themselves producing optical instruments, so the scanning quality is not lost to Japanese brands at all.
In terms of price, in fact, everything around 300 yuan is ok. Because no matter how high-end, you need high-end scanning products of more than 1000 yuan. Generally, in the low-end products, there is little difference between the scanners of 500~600 yuan and 300 yuan. The scanner of 500~600 yuan is just a little more functional, and it's all chicken ribs that you may never use. For example, scanning one copy, sending one email after another, just this boring function, and then adding unnecessary prices to you.
More importantly, the technology of scanner products has long been fully mature, and there is not much technical difference between the same grade, different prices and different brands. So there is no need to spend more money for some external factors. For a scanner, good results are king, and the rest are just clouds.
Therefore, it is more important to buy one with good effect than one with many functions.
In terms of types, it is best to buy a scanner using CCD photosensitive components. CCD scanner is thicker and slightly larger, but it must have a good scanning effect, especially a fuller color.
Now it is generally recommended that you buy a CIS or LED scanner. The only advantage of this scanner is that it is relatively small and can be made very thin. But the scanning effect is not good.
Which brand of scanner is the best?
Canon Canon (world brand, leading brand, market share first, Japan 1937)
Zhongjing (domestic scanner flag inkstone brand, top ten scanner brands)
Ziguang (1988 Beijing, national key high-tech enterprise, top ten scanner brands)
Epson Epson (Nagano, Japan, global leader in digital imaging, 1942)
BenQ BenQ( 1984 was founded in Taiwan Province province, a world brand and one of the top ten scanner brands).
HP HP( 1939 California, USA, world brand, top ten scanner brands)
Hanwang Hardware (Beijing in 1998, national high-tech enterprise, top ten scanner brands)
Which type of scanner is more suitable for home use?
There are only a few hundred small household scanners on the market now. If you want to buy a cost-effective scanner to basically meet the demand, I bought a flat-panel scanner in Zhongjing.
What is the best scanner at present?
It is recommended that Ziguang or Canon brand stay longer, and the after-sales service is guaranteed. You can find it online in Shang Ya.
Which is better for purple scanner?
The well-known scanners on the market are all Canon HP Fujitsu Hong Guang Founder, which are all good, depending on the configuration.
What kind of high-end scanner is good?
Hello: Do you need a scanner in A4 format or A3 format? Can you say it briefly?
What scanning element is better for scanner?
I found this for you. I hope I can help you. Not really!
At present, all HP scanners sold in China adopt CCD(ChargedCoupledDevice) technology.
Usually, when people mention the scanner, they will pay more attention to its scan resolution, but they may not care about the photosensitive elements it uses. Many users will be confused whether to choose CCD scanner or CIS scanner. Which scanner is more suitable?
Simply put, the difference between the two scanners is the photosensitive device. CCD scanners use electronic coupling devices, while CIS scanners use contact image sensing devices. The working principles of these two photosensitive devices are completely different: CCD element itself is the core of the whole scanner imaging, but the light emitted by the light source must be reflected and focused by the lens, and the addition of these optical devices increases the cost of the whole scanner; The CIS scanner uses the light emitted by a tiny light source to be reflected by the scanned manuscript and then directly received by the photosensitive device. CIS photosensitive device itself is enough to complete the imaging task, without the participation of lens and lens, so the assembly of the product is very easy and the cost is very low. Because CIS scanner relies on directly receiving reflected light for imaging, its technical content is relatively low and its scanning depth of field performance is poor. Except for the difference in the photosensitive part, the working principles of other parts of the two scanners are basically the same, and they all convert optical signals into digital information.
Comparing the two scanner products, CCD scanner has obvious advantages, but CIS scanner is not without its merits.
The disadvantage of CCD scanner is that it needs a whole set of optical system, including illumination cold light source, polygon mirror and optical lens, to image on the surface of CCD sensor through complex optical path. Its components are complex, the cost is relatively high, and the processing of scanned image data is relatively complicated. Generally, the cold cathode tube is used as the light source, and it needs to be preheated for about 1 minute to stably emit light. CCD scanner needs to image through a series of lenses and mirrors, so it will produce color difference and optical aberration, and generally it needs color correction through scanning software.
The advantage of CIS scanner is modular design, which integrates scanning light source, sensor and amplifier, and its structure, principle and optical path are extremely simple. Theoretically, the image directly obtained by the sensor from the original surface will not produce color shift and aberration, and the image effect closest to the original can be obtained. The design and manufacturing costs can be reduced, the volume of the product can be designed thinner and smaller, and the CIS scanner has no obvious waiting time.
The disadvantage of CIS scanner is that it can't use the lens, but can only scan close to the original, and the scanning accuracy is low. In addition, its light source can only use LED, which has poor color and uniformity, narrower color gamut than CCD, less rich color and shorter service life.
In addition, because the traditional CCD scanner uses an optical lens to image on the CCD plane, it has a certain depth of field, and can get a clear scanning effect on the raised spine and even the object. CIS scanning head uses sensors to acquire images from the surface of the scanned object. The depth of field is short, and the scanning level is somewhat insufficient. It seems that it is impossible to scan uneven manuscripts and pictures. The object to be scanned must be placed on the scanner smoothly. The depth of field of CCD is at least 10 times that of CIS, which means that the CCD scanner scans 3D objects clearly and vividly in a certain range, while the output image of CIS scanner tends to be blurred and defocused when scanning slightly uneven objects.
High-quality CCD photosensitive element, the same quality can be used 10000 hours. However, the brightness of the light-emitting elements of the current CIS scanner is reduced by 30% on average after 500 hours of use, which means that the life of the light-emitting elements of the CIS scanner is very short.
What kind of scanner is better to buy?
Betcolor wide scanner series
Let me show you a picture, specializing in the production of large-size scanners
Which scanner is the best?
Canon Canon (world brand, leading brand, market share first, Japan 1937)
Zhongjing (domestic scanner flag inkstone brand, top ten scanner brands)
Ziguang (1988 Beijing, national key high-tech enterprise, top ten scanner brands)
Epson Epson (Nagano, Japan, global leader in digital imaging, 1942)
BenQ BenQ( 1984 was founded in Taiwan Province province, a world brand and one of the top ten scanner brands).
HP HP( 1939 California, USA, world brand, top ten scanner brands)
Hanwang Hardware (Beijing in 1998, national high-tech enterprise, top ten scanner brands)