Multimedia Information Retrieval Research Report
1 Introduction
The Internet has developed around the world. With the income of massive information, we want to find what they want on the Internet has become more and more difficult. In order to meet this needs, many companies have launched their own Based on the Internet search service, such as Google, Yahoo, Batu, 3721 and other search engines, which greatly gives people to provide convenience. But this still can't completely solve the problem, because now almost all the functions of all search engines are only based on ordinary text search, the documentation for various formats, the spreadsheet search is very small, and the search for multimedia information is almost no . Therefore, there is now an urgent need for a means to retrieve huge multimedia information.
2, multimedia
As a variety of uses such as information transmission, entertainment, multimedia has developed a large and perfect. The current multimedia information is mainly divided into 3 categories: video, audio and images. Each major category is also a small class, such as video, including many format video information: RealMedia, Divx, etc., images are also divided into multiple images such as JPG, GIF. And these large categories also cross the place, some for the media contain both video information and audio information, and even image information. Because the type of multimedia is so much, the difficulty of retrieving all multimedia information is greatly increased, which is the direction of our research.
3. Research on multimedia information retrieval excuse
The retrieval of multimedia information is mainly for retrieval of multimedia information content, such as audio content, image content, etc. Since there is a certain difference between the media, the classification research retrieves the excuse. Now assume that all multimedia messages have already been met, that is, do not need to search for those multimedia information.
a) Video. Various video families that everyone can see are all kinds of movie documents, such as various RMVB, ASF, MPEG, AVI, etc. A variety of ways for these video retrieval, such as the name of the movie, retrieved by the task inside the film, retrieved with each specific lens inside, and even use a series of lens pieces to retrieve and use a story plot Retrieve it. Of course, you can also use sound to retrieve, but this is the range of audio retrieval.
b) audio. Audio includes various music files, such as MP3, WAV, etc., and even most video files also include audio. If there is, you can retrieve the lyrics, singers, song names. You can also use music to retrieve, such as casually, you can use this paragraph to retrieve. It can also be retrieved by a strong change of sound, an emotional atmosphere expressed by the sound.
c) an image. The current image file is already a variety of, and the information it can express is also rich. You can retrieve the characteristics of the image itself, such as the texture, color, and brightness of the image. You can also retrieve this simply, such as give a sketch, you can search for a picture similar to the sketch. You can also retrieve the information expressed by the image. For example, you can search for all the images of all men with the words "Men". You can find pictures with Jordan with "Jordan".
4. Research on the implementation of information retrieval function
Multimedia is different from ordinary text. It has the complexity of the content, which is much higher than normal text, so the difficulty to retrieve it is much greater than normal text. Some people have proposed: You can first process different multimedia information. When you need to add a comment, you only need to retrieve the information when you need it. This is feasible if the information is rapidly, then the information is increased rapidly. Human material spends in multimedia information is unacceptable. Some people say: You can first convert the media information into normal text, then establish an index structure, you can query the index, this program can researt existing text search technology, but how to convert multimedia information into ordinary text is A big problem. Another is to re-establish formatting standards for media information, so that this format can have both sufficient expressions to be inquired, this is also a research direction, the main problem is the formatting standard. 5, small knot
With the development of multimedia technology, there may be more and more types of multimedia, maybe not, but the general direction should not be too far. The main problem now facing now is idea, but there is no technical ability.
