基于Kinect相机的穴盘苗生长过程无损监测方法

为实现工厂化穴盘苗的无损测量,提出一种基于Kinect相机的穴盘苗生长过程无损监测方法.以黄瓜穴盘苗为监测对象,在穴盘苗正上方架设Kinect相机,获取穴盘苗的彩色图像和深度图像,并进行彩色图和深度图之间的像素匹配;通过对彩色图像进行预处理、阈值分割、形态学运算和连通分量统计,获取穴盘发芽率;同时,由图像分割获取的幼苗...

Non-destructive Monitoring of Plug Seedling Growth Process Based on Kinect Camera

In order to realize the non-destructive and automatic measurement of factory plug seedlings,a non-destructive monitoring method based on Kinect camera was proposed.With the cucumber plug seedlings,the Kinect camera was set up directly above the plug seedlings to obtain the depth image and the color image,and pixels matching was carried between obtained two kind of images.The germination rate was monitored by preprocessing,threshold segmentation,morphological operations and connected component statistics on color image.The center pixel point and the corresponding depth of the leaf were calculated by using the seedling contour obtained by image segmentation,and depth map,so as to obtain the height from the camera to the center of leaf.Lastly,combined with the distance of the camera to the plug tray,the seedling height of plug tray was monitored.The valid depth image was obtained by an algorithm which combined straight-through filtering,conditional filtering,and boundary-preserving filtering to effectively remove background noise around the plug seedlings and depth data with large fluctuations.Then,the leaf area was calculated by blade reconstruction.Based on the results of the height and leaf area of the plug seedling,the estimation of the healthy index was put forward.The method was verified by monitoring the growth process of plug seedlings.Within five days after germination,the monitored germination rate error was no more than 1.567%.The goodness of fit R²between the monitored plant height and the actual plant height was 0.875,and the RMSE was 1.395 mm.The average error of the calculated leaf area was 2.15%,and the R²of healthy index was 0.958.The results showed that the non-destructively monitoring method for plug seedlings can provide an effective solution for the monitoring of the plug seedlings.