Research On Chromatic Aberration Correction Of High-temperature Industrial Television And Intrinsic Color Restoration Method Of The Workpiece In Furnace Based On Zynq

High-temperature industrial television is an indispensable real-time video monitoring platform in steel,petrochemical and other industries.In the steel industry,field operators can understand the running state and position of billet in the high temperature furnace in real time through the high-temperature industrial television,and can also judge the surface temperature distribution of the billet,so as to judge the casting of billet in the process of production.Due to the camera now use color temperature adjustment value of the minimum not less than 2500k,the high temperature furnace in only about 1700k color temperature or lower,which can cause high-temperature industrial television color distortion problem.And for a long time in the high temperature furnace,the bayer filter of the camera will age,and it will cause the loss of the high-temperature industrial television.Aiming at these problems,this paper implements a color camera chromatic aberration correction in the embedded development platform based on Zynq,put forward a kind of intrinsic color restoration method based on infrared imaging,used in high temperature industrial furnace is the special environment of high-temperature industrial television color distortion or leakage problems.With 4.0 industry and put forward of "made in China 2025" in our country,high-temperature industrial television platform of intelligent,low cost,low power consumption will be the trend of the future.In this paper,the embedded development platform based on Zynq SoC launched by Xilinx company has set up a high-temperature industrial television chromatic aberration correction platform with video image collection,Bayer image converted to gray image processing,pseudo-color image processing and HDMI high-definition display.Among them,The high temperature probe composed of high temperature lens and GigE industrial camera completes the collection of workpiece video image in furnace.The image processing part is divided into two steps:the first step is based on the sensor characteristics of GigE industrial camera to complete the processing of Bayer image converted to gray image processing;The second step is to implement the pseudo-color processing.Use the HDMI video output interface on the hardware development board to complete the video output of high-definition.According to the internal structure of the Zynq chip,the software and hardware resources can be used to reduce the product development cycle.Using Vivado HLS high-level synthesis tool to complete the transfer based on C++ Bayer image converted to gray image,pseudo color image algorithm design,and integrated into the corresponding hardware description language respectively.To build a project on the Vivado tool,the complex,time-consuming image processing module and HDMI output display module are placed on the FPGA side for high speed processing.Again on the ARM processor embedded Linux system setup,transplantation could design the elegant interface embedded Qt,video image acquisition,displays and sets the parameters of GigE industrial camera.And the function of Qt program is implemented automatically after the hardware development board is started,which further enhances the intelligence of the platform.Based on the test,the high-temperature industrial television chromatic aberration correction platform based on Zynq can realize the design scheme of video image acquisition,Bayer image converted to gray image and pseudo-color image processing and high definition display.And GigE industrial camera under the specific speed mode and exposure time,three resolution to complete the total time of image processing,acquisition and display frame rate is respectively:The FPGA side has a total time time of 2-3ms for video to complete image processing at 640×480,and the frame rate is stable to 43～45fps;The FPGA side has a total time time of 7～8ms for video to complete image processing at 1280×720,and the frame rate is stable to 17～18fps;The FPGA side has a total time time of 10～11 ms for video to complete image processing at 1280×960,and the frame rate is stable to 13～15fps.The test results show that the design of a high-temperature industrial television chromatic aberration correction platform based on the Zynq is designed to satisfy real-time monitoring at three resolutions.