| 一种地形数据压缩的自适应分块编码方法 |
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| 引用本文： | 周杰,彭嘉雄.一种地形数据压缩的自适应分块编码方法[J].数据采集与处理,1995,10(2):116-120. |
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| 作者姓名： | 周杰 彭嘉雄 |
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| 作者单位： | 华中理工大学图象识别与人工智能研究所，华中理工大学图象识别与人工智能研究所，华中理工大学图象识别与人工智能研究所 武汉，430074，武汉，430074，武汉，430074 |
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| 摘 要： | 地形数据的空间自相关性有着很强的方向属性。为了充分地利用这一属性来消除地形数据之间的信息冗余度，本文提出了一种自适应分块的编码方法。首先确定地形带的自相关方向属性，然后依照地形方向性的不同，将数据按不同矩形形状进行方块划分，然后对较平坦的地形块和剧烈变化的地形块分别采用ＭＶＱ方法和ＢＴＣ－ＶＱ方法进行编码，以保护边缘信息。这种采用自适应分块式的编码方法与通常使用的固定分块方式的编码方法相比，可以大
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| 关 键 词： | 数据处理 数据压缩 自适应分块编码 地形 |
An Adaptive Block Coding Method for Terrain Data Compression |
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| Zhou Jie Peng Jiaxiong Ding Mingyue,Institute of Pattern Recognition & Artificial Intelligence,Huazhong University of Science & Technology Wuhan.An Adaptive Block Coding Method for Terrain Data Compression[J].Journal of Data Acquisition & Processing,1995,10(2):116-120. |
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| Authors: | Zhou Jie Peng Jiaxiong Ding Mingyue Institute of Pattern Recognition & Artificial Intelligence Huazhong University of Science & Technology Wuhan |
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| Affiliation: | Zhou Jie Peng Jiaxiong Ding Mingyue
Institute of Pattern Recognition & Artificial Intelligence
Huazhong University of Science & Technology Wuhan,430074 |
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| Abstract: | Terrain autocorrelation has a strong directionality. This paper proposes an adaptive block coding method for terrain data compression in order to take its advantages. First, terrain data is partitioned into blocks with different shapes according to the directionality of the terrain autocorrelation. Then MVQ and BTC-VQ are applied to blocks with slow variation and sharp variation respectively in order to protect edges. Using this method,a smaller distortion can be gotten as compared with the fixed-block coding. |
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| Keywords: | data processing autocorrelation terrain analysis terrain data data compression adaptive coding vector quantization |
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