摘要
为满足基于小波变换的高速图像处理技术需求,在研究小波分析数理基础上,以Le Gall(5/3)小波为例,设计了一种结构简单、易于硬件高速实现的二维多级小波变换硬件架构。该设计抛弃了传统二维图像在二维多级小波变换时需要先将图像行变换和列变换分开处理,以及不同级变换需要分层处理思路。这种架构设计充分利用图像变换时像素的运算规则,在读取面阵图像2行数据后,就开始图像的行与列,以及不同级小波变换同时并行执行。此外在不同级小波变换中插入多级流水线,有效地提高了整个变换的时钟频率,整个变换采用VHDL语言在FPGA实现。仿真结果表明,该设计思路正确,所得到变换结果与理论计算完全一致。
In order to satisfy the technology demand of the high-speed image processing based on the wavelet transform, in this paper, a hardware structure of the two-dimensional multi-level wavelet transform is proposed based on the research mathematics theory of the wavelet and for the example of the Le Gall （5/3） , which frame can be easily realized by the hardware. This design discards the traditional transform method that is separately the row and column of the image to transform, another the different levels of the wavelet transform needs hierarchical processing. By making full use of the rules of the operation of the pixel in image transformation, when the two lines data of the image has been read, all of the operate is making, which includes the transform of row and column, and the different levels of the wavelet transform. Another multi-level pipeline is inserting into the different level wavelet transform, so the frequency of the whole work is improved. The entire process of the transformation realized in the FPGA by using VHDL. The simulation results show that the design＇ s idea is correct, and the transform results are consistent with the results of the theoretical calculation.
出处
《电视技术》
北大核心
2012年第13期19-22,27,共5页
Video Engineering
