内窥镜血红蛋白增强算法在数字信号处理器中的超快实现

      Ultrafast Implementation of Endoscopic Hemoglobin Enhancement Algorithm in Digital Signal Processor

      • 摘要: 针对一次性医用内窥镜受限于硬件成本而导致成像质量偏低、难以满足精细化手术导航需求的问题,该文旨在通过移植与优化高效的图像增强算法,在确保实时性能的前提下,有效提升内窥镜图像中血红蛋白相关信息的可视性。研究使用的数字信号处理器(digital signal processor, DSP)基于TI公司的TMS320C6678 DSP平台,完成了自适应血红蛋白增强算法的系统移植。结合该DSP架构的并行计算与存储特性,该文从算法与汇编两个层面进行了深度的多级优化:在算法层面,利用数学重构、查表法及高耗时函数替换以大幅降低计算复杂度;在汇编层面,采用软件流水线结构与指令重排技术显著提升了执行密度。实验结果表明,经过上述系统性优化,该增强算法在TMS320C6678单核上的运行时间由原始的7百多毫秒缩减至3 ms以内,在维持良好图像增强效果的同时,满足了内窥镜手术导航对实时性的严苛要求。综上所述,该优化方案使自适应血红蛋白增强算法能够在一次性内窥镜系统中实现高效、实时运行,为低成本硬件条件下提升内窥镜成像质量提供了切实可行的技术路径,表现出显著的临床应用潜力。

         

        Abstract: To address the issue of low imaging quality in disposable medical endoscopes due to hardware cost constraints, which limits their suitability for precision surgical navigation, this study aims to enhance the visibility of hemoglobin-related information by transplanting and optimizing an efficient image enhancement algorithm while ensuring real-time performance. Based on the TI TMS320C6678 DSP platform, the system transplantation of an adaptive hemoglobin enhancement algorithm was completed. Leveraging the parallel computing and memory characteristics of the DSP architecture, deep multi-level optimizations were performed at both the algorithmic and assembly levels: at the algorithmic level, computational complexity was substantially reduced through mathematical reconstruction, look-up tables, and the replacement of time-consuming functions; at the assembly level, execution density was significantly improved by adopting software pipeline structures and instruction reordering techniques. Experimental results indicate that after these systematic optimizations, the execution time of the enhancement algorithm on a single core of the TMS320C6678 was reduced from over 700 milliseconds to under 3 milliseconds, meeting the strict real-time requirements for endoscopic surgical navigation while maintaining effective image enhancement. In conclusion, this optimization scheme enables the efficient and real-time operation of the adaptive hemoglobin enhancement algorithm in disposable endoscope systems, providing a feasible technical solution for improving endoscopic imaging quality on low-cost hardware and demonstrating significant clinical application potential.

         

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