运动目标检测背景差分matlab
时间: 2023-10-16 14:18:04 浏览: 91
运动目标检测背景差分是一种基于背景建模的目标检测方法,常用于视频监控、交通监控等领域。下面是一份在Matlab中实现运动目标检测背景差分的代码:
```matlab
clear all; close all; clc;
%读入视频
obj = VideoReader('test.mp4');
frames = obj.NumberOfFrames;
video = read(obj);
%初始化背景模型
background = zeros(size(video(:,:,:,1)));
for i = 1:20
background = background + double(video(:,:,:,i));
end
background = uint8(background/20);
%背景差分
threshold = 30;
for i = 1:frames
%读取每一帧
frame = video(:,:,:,i);
%将当前帧与背景模型相减
diff = abs(double(frame) - double(background));
%将差值大于阈值的像素点标记为运动目标
diff(diff<threshold) = 0;
diff(diff>=threshold) = 255;
%显示结果
imshow(diff);
end
```
以上代码首先读取视频,然后通过前20帧计算出背景模型。接着对每一帧进行背景差分,将与背景模型差异大于阈值的像素点标记为运动目标。最后将结果显示出来。需要注意的是,这里的阈值需要根据具体场景进行调整。
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