11. Scanner interpretation CCD (charge coupled device): CCD development time, technology and manufacturing process are quite mature, and the image quality of the CCD scanner is quite prominent, and it can meet all aspects of requirements. It mainly adopts the CCD microsystem photosensitive chip as the core of the scanner. Scanning using CCDs requires a set of precise optical systems to cooperate, which makes the scanner structure complicated. Therefore, it is characterized by high scan quality and wide scanning range (sweeping material), long service life, high resolution. The traditional CCD technology works well like a copier, which illuminates the original using an external high-brightness light source, and the reflected light of the original is imaged on the CCD element after the mirror, the mirror and the spectroscope. Since the lens imaging has a certain clear range, the original may have a certain depth of field, that is, an object having a stereo surface can be scanned. The depth of the CCD scanner can generally reach a dozen centimeters, which is 3D scans that manufacturers often say. Since the optical device of the CCD is more complicated, it is difficult to narrow the volume, so the CCD scanner is generally relatively thick. The CCD device is the same as the devices used in the digital camera, and the manufacturing technology is very mature. The CCD device can achieve very high optical resolution, which has reached 1200 × 2400dpi or more. CIS: CIS uses a contact image sensor (photoreceptive sensor) to perform photosensitive, one to two millimeters of the scan platform, a row of 300-600 tightly arranged red, blue, green three-color LED sensor The light is mixed together to generate a white light source, replacing the CCD array, lens, fluorescent tube or cold cathode ray tube in the CCD scanner, and the CCD scanner is integrated into a CIS scanner. Machine, electrical one. The working principle of the CIS product is very like a fax machine. It does not have a lens assembly, and the CIS photoreceptor across the entire scan width and minimizes the original. CIS uses the light-emitting diode as the light source and diode photosensitive element, the structure is simple and compact, so the volume can be made small, and the thickness of the CIS product is typically less than half of the CCD product. However, since there is no lens imaging portion in the CIS device, the depth of field is small, and the planar object can only be scanned. The CIS device belongs to a semiconductor device that achieves a lower cost after large-scale production. However, CIS technology is still in the development phase, and its optical resolution is generally only 300 x 600 DPI. CCD Scanning Technology is very uniform due to the adoption of optical imaging devices, and because of the high-brightness light source, very high color resolution can be achieved due to high brightness light sources. The CIS technology uses large-area photosensitive devices, and it is difficult to ensure the uniformity of the scan, and since the luminous diode light emitting device is used, the color resolution of CIS is not as good as the CCD. Second, the classification scanner of the scanner interface is divided into three kinds of EPP, USB, SCSI, and other interfaces. Their features are as follows: 1, EPP: It is convenient for its maximum feature. And now enhances the EPP port and USB, SCSI speed is very close, so it is more highlighting its convenience, and the EPP port is low, and any models of 486 can be used. So if your computer is the old motherboard, the scanner of the EPP interface is a good choice. 2, USB: Its maximum feature is faster, easy to install, can with electricity plug. But it is high for the main board quality. First, you must support USB, but also the test indicates that if the motherboard is not powered by the USB device, it may cause a scan to crash. With the increasingness of USB applications, the scanner of the USB interface is a development trend. 3, SCSI: Its advantage is that the speed is fast, the scan is stable, and there is less system resources when scanning. The disadvantage is that the cost is higher, and it is difficult to install, and now, except for high-end professional scanners, it is getting less and less.
Third, the main technical parameters resolution of the scanner: The resolution of the scanner is an optical resolution. It refers to how many points divided into one inch, such as 300dpi, it is said that it scans 300 optical points in one inch. The scanner has a maximum resolution, which is mainly referred to in the software interpolation on the optical resolution, that is, through software operations. Color bit: The color bits in the technical parameters of the scanner are data in bits, and now there are 36 bits and 48-bit scanners on the world. 2 How many times is the number of times. So 36 is millions of colors and 48 are hundreds of millions of colors. It is of course color (number of color bits) in use, the better. But the general home 36 is enough ASPI: Advanced SCSI Programming Interface abbreviation. A programming language or protocol developed by Adaptec for communication between SCSI peripherals (such as scanners) and SCSI adapter cards. Automatic Paper Instructor: This is an additional accessory of the scanner, which is mainly used for scanning of auxiliary text manuscript. The ADF can make a continuous scan of up to 50 pages of text page. This additional accessory is usually used with optical text identification software (OCR) instead of image editing programs like Adobe Photoshop. Bit (bit): This is the smallest storage unit of the computer. The value of the bit is indicated by 0 or 1. The more the number of digits can express the more complex image information. For example: Single-Bit unit images use only one bit to record each pixel - white or black. 8 grayscale (8-bit grayscale): Present 256 (2 8th = 256) order grayscale level, used to more accurately manifest the general black and white photo. The 256th order grayscale is sufficient to realize the level of grayscale levels that can be identified than the naked eye. 24-bit color (24-bit color): 24-bit color image consists of three 8-bit color channels. The red green blue channel can produce a combination of 16.77 million colors. The 24-bit color is also called full color. 36-bit color (36-bit color): 36-bit color images consisting of three 12-bit color channels. The red green blue channel can produce a combination of 68.7 billion colors, that is, more colors (this is more than 16.77 million colors generated by the 24-bit scanner). Since the 36-bit scanner can express a more detailed color level, the additional image information obtained by scanning can exhibit more vivid colors, with more realistic images. Brightness: It is a picture of a picture in a picture. The brightness is different from contrast, and the contrast metric is the difference between the brightest tones and the darkest tones in the image. The brightness is determined by the intensity of the bright and dark tones; the comparison is the number of bright and dark levels. Color Calibration: It ensures that the color of the image can be accurately reconstructed. Complete color calibration is usually divided into two steps: calibrating input devices such as scanners, and calibrating output devices such as printers or screens. After accurate calibration inputs and output devices, the scanner can accurately capture color, screen or printers can also be faithful to show color.
Charge Coupling Components (CCD): Represents Charge-Coupled Device, is a long strip-shaped photosensitive assembly, which is used to convert the optical wave reflected from the image into a digital signal during the scanning process. Color Channel: refers to a red, green, and blue ingredient generated colorine. Color Image: One of the image type contains the most complex image information (compared to the unit image and grayscale image). To capture color images, the scanner uses RGB-based color model to handle color data. Contrast: Indicates the interrelationship of a dark area in an image. Comparison refers to the difference in the difference between the brightest tones and the darkest tones in an image. The greater the difference between the difference, the smaller the difference, the smaller the difference is, and the brightness refers to a picture of the image. The balance between the color is adjusted. The contrast is determined by the number of bright and dark levels; the brightness is determined by the intensity of the bright and dark tones. The contrast low image looks gray and plain. Dynamic Color Correction (DCR): Represents Dynamic Color Rendition, which is a full-family computer (Microtek) unique color color school technology. DCR ensures that the image color of the scanned image is as close as possible to the original color. Remove the DESCREEN: ScanWizard Scan a feature in the driver to remove mesh and outlets that will be presented when scanning the print manuscript. The points (DPI) per inch: indicates DOTS Per inch (points per inch) to measure resolutions. The higher the DPI value, the higher the resolution. Dynamic Range: The ability to distinguish how much color order hierarchy can be distinguished from white to black. A scanner with a good concentration range can accurately exhibit the tone level of the original, so that the image looks clearer and can perform more detail. The usual bits determine the maximum concentration value of the scanner. For example, the concentration value of the 36-bit scanner is higher than the 24-bit scanner. Exposure (Exposure): The intensity of the light in the image. A image of an image can be changed by increasing or reducing the photosensitive time. File Format: The format of the graph file. There are many kinds of file format available, each has its own advantages. The most universal file formats include TIFF, PICT, EPS, and PCX. TIFF is the most widely used archive format. Filters: Tools that make special effects on images. Filters in scanning software include fuzzy / blurred enhancement, sharp / sharp enhancement / USM sharp chemical, relief effects, and edge emphasis results. Grayscale: One of the type of image, not only black and white, but also the true gray scale. Each pixel in the grayscale image contains multiple digits, records and displays more levels of bright and dark tones. 4 bits can generate a 16-order grayscale, and 8-bit can produce a 256th step of grayscale. Halftone (HALFTONE): One of the unit image type, which is a pattern composed of different degree-of-degree black points to generate an image of an approximate grayscale image. The picture seen on the newspaper is this halftone image.
These images usually look rough. Highlights: The brightest area in the image. Hymthogram: Distribution of Ming Dynamic Pixels in Image. The specific gravity of the color order distribution is biased toward the left indicates that the image is dark, and the specific gravity is biased to the right, indicating that the image is high. Hue: A characteristic used to distinguish between different colors (ie, to distinguish between red, green or blue, etc.). The color phase is different from saturation, and the saturation is represented by the intensity (shade or greene). Image Editing Software (Image-Editing Software): Software used to make images, such as Adobe Photoshop. Image Enhancement Tools: Tools for adjusting color and image quality in scanning software. These tools include BCE (brightness, contrast, and exposure); color step adjustment tools; tone adjustment tools, curve tools and filters. Image Type: The way you expect image scan and processing. ScanWizard can choose to process the image type with halftone image, black and white, grayscale or color image. IMAGESETER: It is used to output high-resolution images or files to output devices on photo paper or film. Interpolated Resolution: Improve resolution through software, and is therefore also referred to as software enhanced resolution. For example, if your scanner is 300 dpi, you can increase the image to 600 dpi through the software interpolation algorithm. The interpolation resolution is less than the detailed information obtained by the optical resolution, which is useful for some specific work, such as scanning black and white images, or amplifying. Black and White Art: One type of unit image, only black and white, such as a sketch of a pen or pen. Some single color images can also be considered black and white images, such as mechanical blueprints or illustrations, and the like. Each English line number (LPI): It represents LINES PER INCH (number of lines per inch), which is the resolution unit used in printing, and the LPI is different from DPI. The DPI metric is the resolution of the electronic image. Middle Tune: The image in the image is in the field and the dark portion, approximately 50% grayscale part. Netflowers: This is a pattern that is not expected during color printing, which is due to incorrect screen angles when the halftone imaging is incorrect. Usually when you scan halftone images or scan images directly from the magazine (scanned originals are not photos or negatives). Optical Text Identification (OCR): On behalf of Optical Character Recognition, this is a process of scanning images and converts it into a text format. Optical Resolution: The actual resolution of the scanner is also a key factor in determining the number of visual details in an image. Optical resolution is one of the types of resolution, the other is interpolation resolution.
Pixel: The computer used by the computer when the image represents the digital format. For example, an image is very simple is to indicate in a single arrangement of millions of pixels in thousands of pixels. Print Method: The printing method you choose should be adjusted according to the image you scan. For example, the low resolution black and white printer is suitable for printing text and black and white images, but not for printing grayscale images. For grayscale images, higher resolution printers should be used, for example, can be printed to 600 DPI to 1200 DPI printers. If it is printing of a color image, you can choose a color inkjet printer, hot linked printer or press. Resolution: The details of the image are represented by a number of points (DPIs) per inch (DPI). The larger the value of the DPI, the greater the scanned resolution and the image file you get. There are two types of resolution: optical resolution and interpolation resolution. Red-green (RGB): One of the color model, in which the color model is made into a variety of colors with different intensity red, green, and blue. Saturation: The intensity of the color, or the color intensity of a specific color phase. For example, a clear red apple image will appear "colorful" when color saturation. Scaling: Enlarge or narrow the image of the image in ScanWizard, so that the image does not have to zoom in or reduced after transferring to the image editing program. The zoom ratio is inversely relative to the resolution: In terms of the same scanner, the lower the resolution setting, the larger the image can be enlarged; the image ratio can only be reduced when the resolution is set to the highest. Scan Material: The original type used when scanning. Scanning can usually be divided into three categories: reflectance, such as photos or print; positive pieces, such as slides; negative slices, such as the negative film used in general photo. Scanner: The scanner is a digital format that captures the image to the computer to display, edit, store, and output digital formats that can be displayed, edited, stored, and output. The scanner is widely used, such as combining art graphics and photo scans into a file; input printing text scan into a text processing software, avoiding re-typing again; input fax file scanning into database software or text processing software Store; and add images in multimedia. SCSI: Small Computer System Interface, is a computer hardware interface format. SCSI Serial: Connect the serial circuit of the SCSI device in the system. A SCSI serial can include scanners, optical drives, external hard drives, and tape drives. SCSI devices on each connection should have different SCSI ID numbers. Otherwise it will cause hardware conflicts. Shadows: The most dark area in the image. Single-bit Image: Unit image is a simplest image, each pixel is only used by one bit. The image of the unit is divided into two different types: black and white video (also known as line draft; line art) and halftone image.
