Infrared Image Compression Multicast Transmission Of FPGA System Design

Infrared image is used in many fields because of its imaging characteristics.However,the amount of infrared image data is very large,which will bring all kinds of inconvenience when it is transmitted through the network.The image compression technology to solve the problem.JPEG2000 is widely used in various fields because of its low bit error rate,supporting lossy and lossless compression,progressive transmission and other functions.With the advent of the information age,network transmission has become the mainstream of information transmission.Due to unicast network transmission can’t satisfy the one-to-many information transmission,although broadcast can solve this problem,there will be information leakage.Multicast network transmission only transmits to the members of the group,which not only realizes the one-to-many information transmission,but also ensures the confidentiality of information.So it is very meaningful to compress the infrared image and transmit the compressed code through multicast network.The system uses FPGA to combine Cameralink,adv212 and W5300 to realize infrared image compression and network transmission in the form of multicast on the embedded platform.XC7K325T-FFG676 I is selected as FPGA to realize system timing control and auxiliary data processing;Cameralink transmission protocol is responsible for receiving infrared images;ADV212 is responsible for image compression;After compression processing,the compressed code is generated and transmitted to the network interface chip W5300 through the internal RAM of FPGA;The W5300 transmits the compressed code stream via Ethernet in the form of multicast,transmits the data to the computer,and the host reads the data through the network serial port.The change of compression ratio of infrared image is tested.PSNR(peak signal to noise ratio)and MSE(mean square error)are used to measure the quality of the decompressed image.By analyzing the test data,it can be seen that the image distortion is proportional to the compression ratio;The system performance is measured by measuring the image transmission,compression and network transmission time with different compression ratios when the system is working;At the same time,the multicast network transmission is tested.Through the above design,the system can not only realize the compressed of infrared images and multicast transmission,but also the decompressed images have good visual effects.At the same time,the s ystem has the characteristics of high-speed transmission and low delay.