The Design And Implementation Of Image Correction Based On LED Dome

With the development of science and technology,dome displaying has been widely used in different industries.With the increasing demand,the research on dome displaying becomes more extensive and in-depth.The display mode is not limited to projection,but to diversified development.Compared with traditional dome displaying screen,LED dome is more competitive in brightness,contrast and other indicators,and have great potential in the field of flight simulation.If the video source is not processed,pixel dislocation will occur when it is displayed on the dome.In order to ensure that the LED dome can be displayed normally,it is usually necessary to correct the video source.As the display field continues to develop towards higher resolution and faster processing speed,the use of hardware to complete the work of video image processing has become a trend.In this thesis,an image correction system based on LED dome is designed on the FPGA,which can correct the spherical map with a resolution of 3840*2160 @60Hz to an image that conforms to the observation habits of the human eye,and the output delay is within16.67 ms.After correction,the pixel error of single image is between 0.2% and 0.4%,and the pixel loss of adjacent image stitching is less than 0.2%,which realizes the seamless stitching of multi-channel dome image.The main work is as follows:1.Design the overall scheme according to the system requirements,and complete the selection of the main chip and the configuration chip.2.Draw schematics and PCB layouts to complete design work at the hardware level.According to the function,the hardware is divided into three parts.Design a separate board card for each part.3.Design the main logical framework of the FPGA,write code,realize the rearrangement of pixels,and complete the correction of the image.Based on actual requirements,relevant modules are designed,the dome size is passed between each module in the form of parameters,ensuring the portability of code.4.Simulate and debug the code,test on the board,and implement the image correction function on the LED dome.