基于FPGA的低分辨率激光图像增强系统研究  

Research on low resolution laser image enhancement system based on FPGA

作　　者：傅建明[1] 鲍艳[1] 高圣斐 FU Jianming;BAO Yan;GAO Shengfei(Jiangxi University of Technology,Nanchang 330098,China)

机构地区：[1]江西科技学院,南昌330098

出　　处：《激光杂志》2023年第12期115-119,共5页Laser Journal

基　　金：江西省科学规划研究项目(No.YG2018250)。

摘　　要：为提升低分辨率激光图像的整体清晰度和分辨率,提出基于FPGA的低分辨率激光图像增强系统设计。系统硬件主要由I2C总线配置、图像解码、图像存储及VGA显示等模块组成,软件设计中先利用CLAHE算法划分图像,计算每个子块的像素值,将大于阈值的像素均衡分配给小于阈值的像素,实现直方图均衡,然后对分配后的子块计算中心像素点灰度值和直方图映射,选取出需要增强的像素点直接增强,最后将YCrCb4:2:2格式的图像转换为RGB格式,完成色彩空间的转换。系统性能测试结果表明,设计系统提高了图像整体的清晰度和分辨率,具有较好的应用价值。In order to improve the overall clarity and resolution of low-resolution laser images,a low-resolution laser image enhancement system design based on FPGA is proposed.The system hardware is mainly composed of I2C bus configuration,image decoding,image storage and VGA display modules.In the software design,the CLAHE algorithm is used to divide the image,calculate the pixel value of each sub-block,and evenly distribute the pixels larger than the threshold to the pixels smaller than the threshold.,to achieve histogram equalization,then calculate the central pixel gray value and histogram mapping for the allocated sub-blocks,select the pixels that need to be enhanced and directly enhance,and finally convert the image in YCrCb4:2:2 format to RGB format,complete the color space conversion.The system performance test results show that the designed system improves the overall image clarity and resolution,and has good application value.

关 键 词：激光图像 FPGA 分辨率增强 CLAHE算法 色彩空间转换模块 

分 类 号：TN362.2[电子电信—物理电子学]