Hadamard变换光谱仪光谱复原算法的FPGA实现

Realization of spectral recovery algorithm of Hadamard transform spectrometer based on FPGA

提出一种利用FPGA实现Hadamard变换光谱仪光谱复原算法的方案。利用具备数字信号处理功能的FPGA对Hadamard编码图像,可以快速地进行Hadamard逆变换并得到复原图像。根据复原图像可以知道被测目标在各个波段的信息从而获得光谱曲线。实验表明,利用FPGA来完成该型光谱仪的光谱复原可以得到清晰的复原图像和单点光谱曲线,并且与软件得到的处理结果基本相同。该方案可以用于该型光谱仪的实时光谱复原以及基于光谱特征的目标识别领域。

This author proposed a method which used FPGA to achieve spectral recovery algorithm of Hadamard transform spectrometer.FPGA with digital signal processing could quickly complete reverse Hadamard transform and get recovery images.According to recovery images,we could know the information of each band of measured target and get the spectral curve.Experiment showes that we could get clear recovery images and an accurate spectral curve of a single point.The results obtained by hardware were the same as the results obtained by software.The proposed program could be used for real-time spectral recovery and target identification based spectral characteristics.