Real-time pre-distortion system for near-eye display based on FPGA

To meet the requirement of enlarging the field of view angle of near-eye display, a real-time pre-distortion system for near-eye display based on FPGA is designed. This system adopts the coordinate correction method based on off-chip storage lookup table structure and combined with the bilinear interpolation algorithm for calculating grayscale correction, the use of chip designs an image data Block RAM resources stored separately according to the odd lines of data caching structure, reduced the data cache memory, reduces the output delay, has realized the high resolution, high frame rate of video image real-time pre distortion processing. The experimental results show that the real-time pre-distortion system has a good correction effect on the nonlinear geometric distortion generated by the optical system, and the processing delay is small, the display image is clear and complete, and the scalability is strong.