传感技术学报Issue(7)：1016-1022,7.DOI:10.3969/j.issn.1004-1699.2015.07.013
高质量手掌静脉图像获取及ROI提取的研究
Research of High Quality Palm Vein Image Acquisition and ROI Extraction
摘要
Abstract
To avoid the difficulty of obtaining the palm vein images,and low quality of the images along with the complex palm region locating methods,this paper proposes a device for acquiring palm vein images. The quality of acquired images is assessed by 2D image entropy and local 2D entropy. Based on the feedback image quality,the brightness of near infrared light emitting diodes(LEDs)is controlled and some parameters of the camera are set, then the image is recaptured until high quality palm vein is achieved. Those images acquired are used for fast ex⁃traction of the palm region of interest(ROI),and the following image processing algorithms. The images are as⁃sessed by the accelerating implementation method applying to Field Programmable Gate Array(FPGA)platform, and ROI extraction uses local image fast discrimination method. In conclusion,this study provides a method to ac⁃quire the palm vein images using 2D entropy assessment,coordinated with feedback control Pulse Width Modulation (PWM)output. The efficacy gets improved compared to the method of present stage,such as acquiring images’gra⁃dation characteristics,vein characteristics,in the meantime,the sharp images reduce the computation cost of extrac⁃tion ROI and increase the performance of processing.关键词
手掌静脉/图像质量评价/熵/反馈/感兴趣区域Key words
Palm vein/image quality assessment/entropy/feedback/ROI分类
信息技术与安全科学引用本文复制引用
陈朋,蓝晓柯,金峰,史金专..高质量手掌静脉图像获取及ROI提取的研究[J].传感技术学报,2015,(7):1016-1022,7.基金项目
国家自然基金项目（61303139）；浙江省公益技术项目 （）
