Traditional Butterworth filter cannot adaptively adjust the cutoff frequency for different images,in view of this problem,the proposed frequency adaptive two-dimensional Butterworth filter,through the high frequency band energy in the total image energy ratio,adaptively adjust the cutoff frequency.The color space used is Hue-Saturation-Intensity(HSI),and the data format replaces the fixed-point number with a floating-point number,achieving high-speed,high-precision 2D-Fast Fourier Transform(FFT)and 2D-Inverse Fast Fourier Transform(IFFT).Deeply considering the underlying structure of Xilinx 7 series Field Programmable Gate Array(FPGA)hardware,the filter is implemented on the xc7al00tfgg484-3 chip,and on this basis,the image details are enhanced,and the image color is colorless and the image details are richer.The hardware simulation results show that the image with a resolution of 512x512 takes 6548.892 ps to complete a 2D-FFT,which is 99.9998％similar to the spectrum structure calculated by software.The entire design trade-offs between resources,power consumption,and performance.
维普
万方数据