Abstract: DRC is a basic method of image enhancement which is applied in image recognition，video surveillance and so on.According to the applications，a DRC algorithm of image based on nonlinear transform is proposed.Aiming at the processing of an image，this algorithm based on FPGA is implemented，and the whole framework and arithmetic logic of the DRC system are given.Attention is paid to the issue of how to optimize FPGA’s area and speed，and a pipeline control logic is proposed.Verilog HDL is used to describe the design，and then Ncverilog is used to assemble and simulate the code based on Linux.The simulation and implementation of this system are performed by Xilinx’s FPGA design tool Synplify Pro 8.2.1.The results show the validity and feasibility of this design.