A Sonar Image Data Compression Method Based on Improved ezw
A compression method and technology for image data, applied in image communication, digital video signal modification, electrical components, etc., to improve computing efficiency and facilitate compression coding
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[0046] The invention provides a method for compressing sonar image data based on improved EZW, such as figure 1 ,Specific steps are as follows:
[0047] Step 1), collect the sonar image signal, and analyze its statistical characteristics and energy distribution characteristics. When the sonar beam propagates in seawater, it will scatter when it encounters a scatterer whose size is smaller than the wavelength, and the scattered waves interfere with each other, resulting in fluctuations in the echo amplitude. Since the forward-looking sonar has a certain detection angle and distance resolution, the number of scatterers in its resolution unit is limited. When it obeys the binomial distribution, the received sonar signal obeys the K distribution, and its amplitude distribution is as follows: figure 2 (a). Depend on figure 2 (a) It can be seen that due to the interference of scattered waves, the amplitude range of the received echo is relatively large. According to the princip...
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