基于图像跟踪的LED无影灯自动调光方法的研究

Auto Dimming Method of LED Operation Shadowless Lamp Based on Image Tracking

针对手术进行中人为造成阴影的问题,提出了一种自动实时调光的新方法。该方法通过图像跟踪,对手术被照明区域的彩色图像进行实时分割,得到需要消除阴影的目标区域,再将阴影区域映射到照明光源LED阵列分布图上,得到需调节的LED的编号及其照度值;通过以单片机为核心的LED控制器调节输出PWM占空比,改变LED驱动电流,控制相应LED亮度,对阴影区域进行补光处理,从而达到实时消除阴影的目的。

A kind of new method was put forward,which can automatic real-time adjust the lighting of operating lamp.The method was based on real-time image tracking.The shadow area was determined by color image segmentation technology,and the shadow region and location of lighting LED arrays were required to map,then the numbers and illuminance values of LED which needed to be adjusted were issued on the LED dimming controller.The duty ratio of PWM was controlled by circuit of MCU,and drive current of LED was changed,so the purpose of real-time dynamic shadows elimination was achieved.