Composite Filter-Based Bicubic Interpolation Method and FPGA Implementation

This paper proposes a bicubic interpolation method based on Clamp-Laplace composite filters, to solve the problems of blurring and distortion in interpolated images generated by traditional interpolation methods. In addition, the proposed method is implemented in hardware based on ZCU104 FPGA platform. The qualitative and quantitative experimental results show that the proposed method improves PSNR by 1.76% and SSIM by 1.02% compared to the traditional bicubic interpolation method. The proposed processor has been implemented on FPGA platform, with a processing speed of 144 Mpixels/s, an energy efficiency of 157.3 Mpixels/J, a decrease of 5.23% in PSNR and 1.06% in SSIM compare with software implementation.