系统使用CCD获取原始数字图像数据,采用快速算法实现了核心的二维DCT变换,经过编码后,在一个16位定点DSP上实现了快速图像压缩。
The system uses CCD for getting digital image, uses a 16 bit fix-point DSP to perform fast discret cosine transform(DCT) arithmetic and image encoding and realizes a fast image compression in end.
针对数据流上近似查询中的梗概计算,提出了一种新的基于最小误差的维压缩小波变换算法(MEDC)。
Aiming at synopsis computation of approximate query in data stream, a novel wavelet transformation algorithm, Minimum Error based Dimension Compression (MEDC) algorithm, is proposed in this paper.
这种方法的优点是能够在保证不降低网格精度的情况下实现网格DEM数据的压缩以及三维地形上面片的简化。
The merit of this method is it can compress the DEM data and simplify the terrain grids without precision reducing.
应用推荐