Dual Mode High Speed Uncooled Short Wave Infrared Camera Based on FPGA. Issue 3 (June 2021)

• Record Type: Journal Article
• Authors: Liu, Qing; Wang, Huawei; Bian, He; Wang, Hua
• Is Part Of: Journal of physics. Volume 1952:Issue 3(2021)
• Publication Date: 2021-06
• Subjects: SWIR -- non-uniformity correction -- TMR -- FPGA; Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1952/3/032042
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: This paper introduces a short-wave infrared camera logic design based on FPGA. The hardware design adopts the architecture of Sofradir Tecless SWIR detector SW640+Xilinx FPGA xc 4vsx 55, which has a dual working mode of 640×512 at 25 FPS and 64×48 at 4000 FPS. The function of high precision target tracking can be realized by high frequency capture of laser signal. In this design, the non-uniform correction coefficient table in SDRAM cache Flash is controlled by FPGA to correct the image of full resolution mode, and the table of 64×48 is cached by Bram in FPGA to achieve fast image correction and processing. The exposure time is controlled by the external synchronous signal, and the 14 bit precision image data are collected by four ADCs for restoration. The output data is processed by image bad point correction, non-uniform correction, median filtering, histogram equalization, and then the image is packaged and sent by the specified protocol.