Three bottlenecks of the hottest digital imaging t

  • Detail

The three bottlenecks of digital imaging technology

the rapid development of digital imaging technology is really unexpected. In just five or six years, the varieties of digital cameras, scanners and printers have emerged in endlessly, the technical quality has been continuously improved, and the price has been continuously falling. It is believed that the development potential of digital image is very huge. However, in a short period of time, digital imaging technology is still difficult to achieve breakthrough development, because there are still three bottlenecks in digital imaging technology. The three bottlenecks are image quality, processing speed and market price, which are interrelated and affect each other

I. price of digital imaging equipment

let's take a look at digital cameras first. At present, the civilian portable digital camera has reached 3million pixels, but the image quality of the photos taken by the traditional 135 camera is still unmatched, but the price has reached more than 7000 yuan; Although the number of pixels of the professional SLR digital camera has reached 6million, which is comparable to the traditional 135 camera, the price is surprisingly high, but the price is surprisingly high, reaching more than 200000 yuan. The quality of the back of the digital camera is comparable to that of the traditional 120 camera. But the price is also unacceptably high, generally between 100000 and 400000. There are not many such digital cameras in China

let's look at the scanner. Although the image quality of the flat-panel scanner used for scanning pictures is OK, and the price is not high, the price of the slightly better negative 135 scanner is more than 10000 yuan. And as long as it is a high-resolution scanner that can scan 120 negatives, whether it is a special negatives scanner or a dual platform scanner, the price is more than 50000 yuan. It is difficult for such scanners to enter the homes of Chinese people. The image quality of the negative printed photos scanned by the scanner with more than 50000 yuan can not be compared with that of the photos magnified by the traditional one. However, the quality of the photos magnified by the laser enlarger after the roller scanner is significantly higher than that of the traditional ones. The price of the scanner is between 300000 and 1.5 million, and the price of the enlarger is between 500000 and 2million. Such a price is astronomical for the Chinese market. Apart from the large photo agencies with abundant funds, it is difficult for several units in China to afford it

printers fall into three categories: inkjet, laser and thermal sublimation. The prices of laser and thermal sublimation printers are relatively high, ranging from twoorthree yuan to hundreds of thousands yuan according to the size of the format; At present, inkjet printers are mostly used for photography. Inkjet printers are mainly divided into two categories: large format commercial printers and small format home printers. Although inkjet printers for home and office use are relatively cheap, the cost of consumables used to print photos is too high. Printing an A4 size photo costs about 10 yuan. Although the cost of consumables for large format printers is relatively cheaper, the price of printers is between 100000 and 500000 yuan, and the price of slightly smaller printers is more than 50000 yuan

to sum up, due to the price problem, it is still too early for digital imaging equipment to enter the family, especially in China. According to the statistical results released by the National Bureau of technology statistics, at present, the number of computers in Chinese households is about 18million, while the number of printers, scanners and digital cameras in Chinese households is 42%, 5% and 0.4% of the number of computers respectively. The main reason is the price. The lower the quantity of equipment, the greater the gap between the actual price and the expected value. For example, according to the statistics of Tsinghua Ziguang company, at present, the price generally accepted by people for civil digital cameras is between 2000 yuan and 300 yuan, which is also the training and output base of high-tech talents in the field of polymer surface materials. However, the actual price of civil digital cameras is between 6000 yuan and 7000 yuan, far exceeding the affordability of most people. However, the actual price of the negative scanner is much lower than people's affordability. However, due to the high technical content of digital imaging equipment, its early development cost and later manufacturing cost are both very high. If the market sales go up, it is difficult to reduce the price, and if the price does not go down, it is difficult to increase the market sales. This contradiction is precisely the bottleneck of the development of digital imaging technology

II. Image quality of digital image

at present, in addition to the image quality of the photos taken by tens of millions of digital backs like Qin, which has reached the image quality of the photos taken by the traditional 120 camera at this stage because the aircraft began to use the thick and large cross-section structure, the image quality of the photos taken by the static scanning digital backs has exceeded the image quality of the traditional 120 camera, The image quality of most civilian portable digital cameras and professional SLR digital cameras is not as good as that of traditional cameras. Scanner except that the scanning quality of the two 4000dpi 135 special film scanners, microtek4000t and Polaroid 4000t, can be compared with the image quality of the direct amplification of the traditional 135 film, other scanning quality with a scanning resolution lower than 4000dpi can not be compared with the image quality of the direct amplification of the traditional 135 film, let alone the image quality of the direct amplification of the traditional 120 film. It can be compared with the image quality of the photos directly enlarged by the traditional 120 negative film, and only the large roller scanner can surpass it

although the image quality of high-end digital back and large roller scanners can be completely comparable to or even exceed the image quality of traditional images without considering the price factor, there is still a contradiction that is still difficult to solve at present, that is, its high-quality images need to occupy a very large data space. At present, a high-definition digital back photo needs to occupy 50m to 600m files, while a 120 negative scanned by a roller scanner or 4 × 5 negative film, the file volume shall reach 200m to 1200m. With such a large amount of files, a CD can only store photos taken by the digital back. To store high-definition photos scanned by the roller scanner, a CD can only store three, or even two or more CD can store one photo. However, even the 40g hard disk with the largest capacity at present can only store less than 40 digital images above 1000m. The sharp contradiction between image definition and its capacity is the biggest bottleneck hindering the development of digital image

III. processing speed of digital images

compared with traditional images, another bottleneck of digital images is their processing speed

let's take a look at the digital camera first. When taking a picture with a civil digital camera, it always lags behind for a period of time when the shutter is connected. This is called "shutter lag" for digital cameras. Good digital cameras have a very short shutter lag, but they all have shutter lag, which obviously has a certain impact on shooting. The image storage of digital cameras also needs a period of time, especially for high-definition digital photos. This is a big obstacle for fast continuous shooting

let's look at the scanner. It takes more than 5 minutes for a high-definition negative scanner to scan a negative (including pre scanning), some of which are slower, and the fastest is more than 2 minutes. The price of a fast scanner is its price. For example, the time for scanning a negative film with the microtek4000t scanner is 4 minutes. Plus the time for installing the negative film and pre scanning, the total time for scanning a negative film is at least 5 minutes. The Kodak 3570 scanner only needs 20 seconds to scan a negative. With the time for installing the negative and pre scanning, the total time for scanning a negative is about 1 minute at most. However, the price of microtek4000t scanner is only 13000 yuan, while the price of Kodak 3570 scanner is as high as 60000 yuan. Scan a 120 "6" with a minitek42500 scanner at a resolution of 2500dpi × It takes at least 10 minutes for the whole time of 9 negatives. Although it can scan multiple negatives at the same time, the price of more than 50000 yuan is prohibitive. The scanning accuracy and average single scanning time of large roller scanners are much better than those of ordinary special negative scanners, but the price of hundreds of thousands to millions of yuan is almost astronomical for ordinary units and individuals

the speed of computer image processing is also very slow. Not to mention modifying the image or making some special processing according to Meike, that is, the time required to open an image with a slightly larger file size is also very long, which is different from the stretching experiment. Not to mention the newly outdated piv1.5g series models, it takes more than ten seconds to open a 1000m image. It's even slower for you to do some slightly complicated work. For example, if you want to change the color of a 200m file size photo, it will take about one minute. It takes longer to do other complex work. It can be said that at present, for home, commercial and office computers, image processing requires the highest computer configuration, whether it is the main frequency, memory, hard disk, display card and display. Even so, the current maximum configuration is only just meeting the requirements

look at the printer again. At present, small format household printers use 1440dpi resolution to print an A4 format color photo, which takes time, and the price of printing paper and ink is very high. Although the printing speed of large format commercial printers is much faster than that of small computers, it is still quite slow to print large format and high-definition photos. For example, to print a 1 with a resolution of 1440dpi × 1.5 for 1200m photos, it will take at least 4 hours

from the above discussion, it can be seen that no matter shooting, scanning, processing or printing a high-definition photo, the digital image cannot be compared with the traditional image in terms of speed

to sum up, the three bottlenecks of digital imaging technology image quality, processing speed and market price affect and restrict each other, and image quality and processing speed are directly related to the capacity of computer memory and hard disk. However, digital imaging equipment, like computers, are information technology products. Their development complies with Moore's law, that is, its capacity and speed are doubled every month, and the price of products will continue to decline. Therefore, it can be predicted that in the near future, the three bottlenecks of digital imaging products will be broken one after another. At that time, digital imaging equipment will greatly surpass traditional imaging products in terms of image quality, processing speed and market price. The spring of digital imaging technology will come sooner or later

Copyright © 2011 JIN SHI