基于FPGA的La Gell5/3小波变换的硬件电路设计

Hardware Circuit Design for La Gell 5/3 Wavelet Transform Based on FPGA

为了对冗余的图像数据进行有效的压缩,提出一种基于FPGA的快速小波变换的方案。介绍了La Gell 5/3提升小波变换的原理,设计了适用于高帧频CMOS相机的La Gell 5/3提升小波变换硬件结构,采用Verilog硬件语言在QuartusII软件平台下对设计方案进行了实验,利用Matlab语言对图像进行反变换,并通过变换前与反变换后图像的比对,验证了算法的可行性。实验结果证明:该方案成功实现了基于FPGA的La Gell 5/3提升小波变换系统对给定图像的三级快速小波变换,相比较于DSP等硬件电路,更适合于高速图像实时处理的应用。

In order to compress the redundant image data effectively, this paper put forwards a fast wavelet transform project based on FPGA. The principle of La Gell 5/3 wavelet transform is introduced, and an appropriate wavelet transform hardware circuit of La Gell 5/3 wavelet transform is designed for the high frame rate CMOS camera. This design is programmed on the QuartuslI software platform in Verilog hardware language. The feasibility of the algorithm is verified by comparing the original image to inverse transformed image, which is transformed by Matlab. The experimental result shows that this program successfully realized the three-level fast wavelet transform for a given image through the system of La Gell 5/3 lifting wavelet transform which based on FPGA, and the plan is more suitable for application of real-time high-soeed image orocessing by compared to other hardware circuit such as DSP.