Background:
1. Digital image processing technology originated in the 1920s, when through submarine cables transferred from London to New York, a photo, which us digital compression technology. Look at the technical level in 1920, if you do not compress, 啤酒花的作用transfer an image to one week after compression only need 3 hours. The Jet Propulsion Laboratory of the United States in 1964 to deal with the spacecraft "Voyager VII nt back photos of the moon, which marks the third generation of computers after the advent of digital image processing concept began to be applied. Subquently, the rapid development 王莽新政of digital image processing technology, has become the engineering, learning between the various disciplines in the field of computer science, information science, statistics, physics, chemistry, biology, medicine and even social sciences and爱莲说 the object of the study.
2.The main medium of human transmission of information is the voice and 女性活动image. According to statistics, 百色地区in the accepted human auditory information accounted for 20%, accounting for 60% of the visual information, such as taste, touch, smell, the total adds up, but accounted for 20%. So, as the media and other means of relaying information - the ima
ge information is very important, as the saying goes: "a picture is worth a thousand words," at a glance ", reflects the image in the transmission of information is unique.
One of the earliest applications of digital image processing is the newspaper industry, at that time, the image for the first time via submarine cables from the London to New York. Other applications are as follows:
The telegraph printer using special characters in the encoded tape digital image in 1921,1922 in the signal across the Atlantic twice, the digital image from the punched tape, you can e that some of the errors,To 15 shades equipment without modification through cable nt Generals Pershing and Foch photos from London to New York in 1929,U.S. spacecraft nt the first moon photos, "Traveler VII satellite affect light images taken 17 minutes 微量元素检查多少钱before the lunar surface at 9:09 on July 31st, 1964 (Eastern daylight time).
Significance
1. Image is an important source of people to obtain information from the objective world
Human to obtain information from the objective world through the n organs, through the ears, eyes, mouth, no, hand, by listening, watching, taste, smell and touch to get information. In the information, 比个高the visual information is accounted for 60% to 70%. Characteristics of visual information is a large amount of information, and spread fast, and the role of distance, psychological and physiological effects, with brain thinking and Lenovo, has a strong ability to judge. Followed by the human visual sound, the high nsitivity of the human eye, and the ability to identify strong and can not only identify the scene, but also to identify the person's mood, Thus, the image information is very important for humans.
2. The image information processing is important means of the human visual continuity.As we all know, the human eye can only e the visible part, but look at the prent level of science and technology, can be imaged and not just visible light.
3.Digital image processing technology has important significance to the national economy and the people's livelihood
The development of digital image processing technology to many technology has mature
d. Applications in various fields has achieved great success and significant economic benefits. Such as industrial production, military, medical and scientific rearch in the engineering field, has become widespread. Distribution and burial underground mineral resources can be obtained by analyzing the resources satellite photos; using infrared, microwave remote nsing technology for investigation to the covert military facilities; X-ray CT has been widely ud in clinical diagnosis, becau it is available to the body's internal organs. tomographic images, therefore, can accurately determine the lesion location brings great convenience for the diagnosis and treatment of dia. As for design automation in industrial production and product quality inspection is very promising. The basic technology, similar examples of the application of digital image processing technology in curity and monitoring is indispensable everywhere. As for the communication and multimedia technology in image processing is an important key technology.
The characteristics of the digital image processing
Large amount of image information
In digital image processing, an image can be en as compod by the pixels in the image matrix, the gray level of each pixel of at least u 6bit reprented generally u precision available 12bit or 16bit. General resolution of the image pixel count of 256 × 256, 512 × 512, high-resolution images up to 1024 × 1024 小型车排行榜or 2048 × 2048 pixels.
Digital image processing technology and strong
A wide range of basic knowledge and technical experti involved in digital image processing. Involving communication technology, computer technology, electronic technology, television technology in general, even more As regards to the basics of mathematics, physics and other aspects. The computer is a conventional image processing tools, to software, hardware, network interface, and a number of technology involved in image processing and parallel processing technology is very important in the real-time image processing.
Cloly related to image information theory and communication theory
