Question

嗨我在提取前景后尝试在检测到的blob周围绘制一个椭圆。在这里我附加了我的代码，但是当我尝试绘制椭圆时它会出错。如果有人可以帮我修改这段代码，那将是一个很大的帮助。

    function fg_drawn = DrawEllipse(fg,centroids,thetas,rhos)

fg_drawn = fg;

NumOfFrames = length(fg);

t = 0:.01:2*pi;

for frameIndex = 1:NumOfFrames


    theta = thetas(frameIndex);

    %TO BE MODIFIED
    b = 60;
    a = b / rhos(frameIndex);

    h = centroids(frameIndex,1);
    k = centroids(frameIndex,2);

    x = h + cos(theta)*(a*cos(t)) - sin(theta)*(b*sin(t));
    y = k + sin(theta)*(a*cos(t)) + cos(theta)*(b*sin(t));

    for c = 1:length(x)
        fg_drawn{frameIndex}(round(y(c)) , round(x(c)) ) = 0.5;
    end

    fg_drawn{frameIndex}( round(centroids(frameIndex,2)) , round(centroids(frameIndex,1)) ) = 0.5;

end

m file

clc
clear all
disp('Loading Video..');

v = VideoReader('test.avi');

video1 = read(v,[10 inf]);
video1 = mat2cell(video1, size(video1,1), size(video1,2), size(video1,3), ones(1,size(video1,4)) );
disp('Extracting Foreground..');
fg = extractForeground(video1,30,4,0);
disp('Eliminating Noise from Foreground..');
fg_smooth=detectBlob(fg);
disp('Evaluating Motion History Image of the video..');
motion_history = MHI(fg_smooth);
disp('Determining Ellipse Statistical Properties..');
**c = centroid(fg_smooth);
[thetas rhos] = OrientEccent(fg, c);**
fg_drawn = DrawEllipse(fg_smooth,c,thetas,rhos)
[fg_drawn,thetas,rhos] = EllipseMain(fg)

figure(1);
imshow(fg{22})
title('Foreground Extraction');
figure(2);
imshow(fg_smooth{22})
title('Noise Elimination');
figure(3);
imshow(fg_drawn{22})
title('Ellipse Detection');

T=15;
frameDisp = motion_history{22};
frameDisp = double(frameDisp);
frameDisp = frameDisp ./ T;
figure(4);
imshow(frameDisp)
title('MHI Image');
disp('Analyzing Statistics for Video..');
[sigma_t sigma_r c_motion] = statistics(thetas, rhos, motion_history);
figure(5)
subplot(2,2,1);
plot(sigma_t);
title('Theta Std Dev Values');
subplot(2,2,2);
plot(sigma_r);
title('Rho Std Dev Values');
subplot(2,2,3);
plot(c_motion);
title('C Motion Values');

maxTheta = max(sigma_t);
gaussianFilter = fspecial('gaussian', [9, 9], 3.8);

for t = 1:(length(sigma_t)-5)
    if(c_motion(t) > 0.65 && sigma_t(t) >= 0.9*maxTheta)
        disp('FALL DETECTED!!');
        figure(6);
        imshow(imfilter(video1{t+5}, gaussianFilter));
        break;
    end
end
disp('Done!!!');

当我运行此代码时，我得到的错误是尝试访问fg_drawn。％cell（134,0）; index必须是正整数或逻辑。 DrawEllipse出错（第33行） fg_drawn {frameIndex}（round（y（c）），round（x（c）））= 0.5;

因为错误本身表示索引必须是正整数，我尝试了几种方法来防止x或y变为负数。但没有任何效果。我仍然无法在检测到的斑点周围得到椭圆图。

使用MATLAB在前景中围绕检测到的斑点绘制椭圆

0 个答案: