通过分析工业电视图象的特点,提出了一种基于分形小波变换编码的工业电视图象压缩方法,从而较好地 解决了分形编码只能压缩静止图象的不足.该方法不仅适合于煤矿工业电视图象压缩,而且还可用于其它背景区图象相对静止的工业电视图象的压缩编码,实验结果表明,该法可取得较高压缩比和峰值信噪比,因此具有实用价值.

In the multimedia safety monitoring and detecting system of coal mine, the key technology is to compress the video signals which are from the subsystem of optic-fiber industrial TV. Fractal image coding can not be used in real time coding, because this method will have a delay when the code is picked up. After analyzing the feature of industrial TV image, the image is divided into background district and motive district by means of image enhancement and edge measurement. The background district is a static image, which can be compressed by fractal image coding. After that, a method of block-based image coding and wavelet transform coding to compress the image is presented. It is a good method for fractal coding to compress the motive image. It can be used not only in coal mine industrial TV image but also in any industrial TV image which background image is still and has practical value widely. At the end of the paper, a sample of compression is given.Fractals are a modern invention, they have been recognized as useful to natural scientists only over the last 20 years. Euclidean geometry provides concise accurate descriptions of man-made objects but is inappropriate for natural shapes. Fractals provide an excellent description of many natural shapes. In general, fractals are the result of a construction procedure and algorithm that is often recursive and suited to computers. Fractal coding is a new image coding method after subband coding, model-based coding and wavelet transform. It breaks through traditional coding theory frame. In real time coding and automatic coding it will have wide research prospect.