一种基于FPGA的图像自动增强算法与实现

范斌; 于起峰

doi:10.11728/cjss2018.02.261

一种基于FPGA的图像自动增强算法与实现

doi: 10.11728/cjss2018.02.261

范斌^1,2,
于起峰¹

1. 国防科技大学空天科学学院长沙 410073;
2. 北京空间机电研究所北京 100094

基金项目:

国家重点研发计划项目资助（2016YFB0501300，2016YFB0501302）

详细信息

作者简介:
范斌,E-mail:fanbin508@163.com

中图分类号: V524
计量
- 文章访问数: 1190
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- 被引次数: 0
出版历程
- 收稿日期: 2017-07-03
- 修回日期: 2017-12-17
- 刊出日期: 2018-03-15

Design and Implementation of an Automatic Image Enhancement Algorithm Based on FPGAormalsize

FAN Bin^1,2,
YU Qifeng¹

1. College of Aerospace Science, National University of Defense Technology, Changsha 410073;
2. Beijing Institute of Space Mechanics and Electricity, Beijing 100094

摘要

摘要: 图像灰度分布不均匀是影响画质的重要因素，集中表现在对空间场景成像时，图像中存在大量过亮或过暗的区域.同时，算法的实时性和嵌入式平台的可实现性是设计实现空间应用载荷需要着重考虑的问题.针对上述问题，提出一种适合于FPGA实现的图像自动增强算法.算法以分段线性变换方法为基础，采用K均值聚类对视频图像的灰度直方图进行动态的区间划分；构建分段函数系数与直方图之间的定量关系，自动计算线性变换系数；采用高效的并行流水线结构设计，实现了基于FPGA的硬件处理系统.仿真和成像试验结果表明，该FPGA硬件系统实时性好，适应性强，针对不同的场景均取得较好的处理效果，具有广阔的应用前景.
- 图像增强 /
- FPGA /
- 航天遥感
Abstract: Since there are many too dark or too bright areas in pictures that shot in the space, the corresponding images are uneven distributed, and the image quality is damaged. How to improve the processing speed of the algorithm and how to implement the algorithm by the embedded system are also key problems for space application. In this paper, the automatic image enhancement algorithm which is suitable to be implemented by the FPGA is proposed to solve these problems. The basis of the proposed algorithm is the piecewise linear transformation algorithm. In practical, firstly, the K-means clustering is used to segment the histogram into several sections automatically. Secondly, the quantitative relationship between the histogram distribution and the coefficients of the piecewise linear function is established. As a result, the coefficients can be automatically calculated. Thirdly, the corresponding FPGA system is implemented. And the high-performance parallel pipelined technology is used to ensure the real-time processing ability of the system. The simulations and the experimentations show that the proposed FPGA system is characterized as real-time processing ability and good adaptability. It can achieve good processing effects for different sceneries, and can be used in various practical applications.
- Image enhancement /
- FPGA /
- Space remote sensing

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参考文献(16)

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