内窥镜下提高出血点可见性的饱和度色调映射算法  

Saturation-to-hue mapping algorithm for improving the visibility of bleeding points under endoscopy

作　　者：宋萌[1] 倪旭翔[1] 王立强[1] 袁波[1] 陈可[1] 张基强 Song Meng;Ni Xuxiang;Wang Liqiang;Yuan Bo;Chen Ke;Zhang Jiqiang(College of Optical Science and Engineering,Zhejiang University,Hangzhou,Zhejiang 310027,China)

机构地区：[1]浙江大学光电科学与工程学院,浙江杭州310027

出　　处：《光电工程》2025年第3期2-10,共9页Opto-Electronic Engineering

基　　金：国家重点研发计划(2023YFF0720402);国家自然科学基金(T2293751)。

摘　　要：针对内窥镜手术中淹没性出血点可见性差影响止血操作时间的问题,提出了一种4LED照明结合饱和度-色调映射算法的出血点增强显示方法。该方法使用对粘膜组织和不同浓度血液成像具有特异性的4个窄带LED进行同步照明,以代替传统的氙灯光源实现彩色成像;然后在xyY颜色空间中,对彩色图像的饱和度信息进行拉伸后再向色调映射,进而有效提升淹没性出血点与出血点周围区域的色差。针对动物材料的硬镜体外实验结果表明,饱和度-色调映射成像(saturation-to-hue mapping imaging,SHMI)在出血点与出血点周围区域的色差明显大于常规白光图像(41.31>11.78),有效提高了淹没性出血点的可见性,可进一步降低内窥镜手术风险。To address the poor visibility of submerged bleeding points during endoscopic surgery,which can extend hemostasis procedures,a method combining 4-LED illumination with a saturation-to-hue mapping algorithm is proposed for enhancing bleeding points visibility.With imaging specificity for tissue and blood of varying concentrations,four narrow-band LEDs synchronous lighting are used for imaging,replacing the conventional xenon light source.In the xyY color space,the saturation information of the image is stretched and then mapped to the hue,effectively increasing the color differences between submerged bleeding points and the surrounding areas.Vitro experimental results using rigid endoscopes on animal materials demonstrate that the enhanced images achieved significantly higher color difference between bleeding points and their surroundings than conventional white-light images(41.31>11.78).Saturation-to-hue mapping imaging(SHMI)effectively improves the visibility of submerged bleeding points and reduces the risk associated with endoscopic surgeries.

关 键 词：图像增强 内窥镜 多光谱成像 出血点检测 

分 类 号：TN29[电子电信—物理电子学] TP391.41[自动化与计算机技术—计算机应用技术]