Open AccessDesign and Implementation of Brightness Configurable Bi-Histogram Equalization Based on FPGA
Author(s) -
Zhaolin Wang,
Hongju Yue,
Jun Wang,
Huibin Tao,
Li Wang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/693/1/012087
Subject(s) - brightness , histogram equalization , field programmable gate array , computer science , histogram , computer vision , contrast (vision) , adaptive histogram equalization , artificial intelligence , equalization (audio) , contrast ratio , computer hardware , image (mathematics) , algorithm , optics , physics , decoding methods , operating system
In order to improve the contrast of images in different brightness environments, based on brightness preserving Bi-Histogram Equalization(BBHE), a Brightness configurable Bi-Histogram Equalization(BCBHE) system is proposed and implemented by FPGA in this paper. The system implements the BBHE algorithm, and adds the brightness configurable logic unit to realize the brightness configurable image contrast enhancement. The test results of the video processing platform of Genesys 2 development board show that: the design obtains BBHE images with different brightness configurations, and achieves the best contrast enhancement visual effect by setting image brightness threshold in different field environment. At the same time, based on the parallel operation characteristics of the FPGA, it meets the requirements of real-time image processing.