How to draw single bounding box by combining all bounding boxes

Question

Stephen john 2022-8-25

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1785785-how-to-draw-single-bounding-box-by-combining-all-bounding-boxes

评论： Walter Roberson 2022-8-25

采纳的回答： KSSV

GFSK.png

在 MATLAB Online 中打开

Hello everyone, I hope you are doing well. I have the image in which i want to draw bounding box on the object.

I have write the following code, which convert the image in binary form and draw the bounding box around white object.

But i want to draw a single bounding box. How can i draw or combine all bounding boxes in MATLAB and plot it on original Image.

Image=imread('GFSK.png')
im1=im2bw(Image);
invertedI = ~im1
[labeledImage, numRegions] = bwlabel(invertedI);
props = regionprops(labeledImage,'all' );
allLengths = [props.Area];
% NumberofPulses=allLengths;
centroids = vertcat(props.Centroid);
figure;
hold on;
for k = 1 : numRegions
    y1 = round(centroids(k, 2));
    y2 = y1;
	xt = props(k).Centroid(1);
	yt = props(k).Centroid(2);
    BB = props(k).BoundingBox;
    
	
	
    rectangle('Position', [BB(1),BB(2),BB(3),BB(4)],'EdgeColor','b','LineWidth',1) ;
    
    caption = sprintf('Class 1') ;
    hold off
    title(caption, 'FontSize',10);
end

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

KSSV 2022-8-25

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1785785-how-to-draw-single-bounding-box-by-combining-all-bounding-boxes#answer_1032875

在 MATLAB Online 中打开

Image=imread('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1107335/GFSK.png') ;

im1=im2bw(Image);

invertedI = ~im1 ;

[labeledImage, numRegions] = bwlabel(invertedI);

props = regionprops(labeledImage,'all' );

allLengths = [props.Area];

% NumberofPulses=allLengths;

centroids = vertcat(props.Centroid);

X = zeros(numRegions,4) ;

Y = zeros(numRegions,4) ;

figure;

hold on;

for k = 1 : numRegions

y1 = round(centroids(k, 2));

y2 = y1;

xt = props(k).Centroid(1);

yt = props(k).Centroid(2);

BB = props(k).BoundingBox;

rectangle('Position', [BB(1),BB(2),BB(3),BB(4)],'EdgeColor','b','LineWidth',1) ;

X(k,:) = [BB(1) BB(1)+BB(3) BB(1)+BB(3) BB(1)] ;

Y(k,:) = [BB(2) BB(2) BB(2)+BB(4) BB(2)+BB(4)] ;

caption = sprintf('Class 1') ;

hold off

title(caption, 'FontSize',10);

end

x0 = min(X(:)) ; x1 = max(X(:)) ;

y0 = min(Y(:)) ; y1 = max(Y(:)) ;

L = abs(x1-x0) ;

B = abs(y1-y0) ;

rectangle('Position', [x0 y0 L B],'EdgeColor','r','LineWidth',1) ;

6 个评论
显示 4更早的评论隐藏 4更早的评论

KSSV 2022-8-25

在 MATLAB Online 中打开

Image=imread('https://in.mathworks.com/matlabcentral/answers/uploaded_files/1107335/GFSK.png') ;

im1=im2bw(Image);

invertedI = ~im1 ;

[labeledImage, numRegions] = bwlabel(invertedI);

props = regionprops(labeledImage,'all' );

allLengths = [props.Area];

% NumberofPulses=allLengths;

centroids = vertcat(props.Centroid);

X = zeros(numRegions,4) ;

Y = zeros(numRegions,4) ;

figure;

hold on;

for k = 1 : numRegions

y1 = round(centroids(k, 2));

y2 = y1;

xt = props(k).Centroid(1);

yt = props(k).Centroid(2);

BB = props(k).BoundingBox;

% rectangle('Position', [BB(1),BB(2),BB(3),BB(4)],'EdgeColor','b','LineWidth',1) ;

X(k,:) = [BB(1) BB(1)+BB(3) BB(1)+BB(3) BB(1)] ;

Y(k,:) = [BB(2) BB(2) BB(2)+BB(4) BB(2)+BB(4)] ;

end

x0 = min(X(:)) ; x1 = max(X(:)) ;

y0 = min(Y(:)) ; y1 = max(Y(:)) ;

L = abs(x1-x0) ;

B = abs(y1-y0) ;

imshow(Image)

hold on

rectangle('Position', [x0 y0 L B],'EdgeColor','k','LineWidth',1) ;

caption = sprintf('Class 1') ;

title(caption, 'FontSize',10);

Stephen john 2022-8-25

@KSSV i am unable to do that , thats why i asked

Walter Roberson 2022-8-25

在 MATLAB Online 中打开

text(x0, y0, 'class1')

请先登录，再进行评论。

How to draw single bounding box by combining all bounding boxes

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

采纳的回答

6 个评论
显示 4更早的评论隐藏 4更早的评论

更多回答（0 个）

另请参阅

类别

标签

产品

版本

Community Treasure Hunt

How to draw single bounding box by combining all bounding boxes

0 个评论 显示 -2更早的评论隐藏 -2更早的评论

采纳的回答

6 个评论 显示 4更早的评论隐藏 4更早的评论

更多回答（0 个）

另请参阅

类别

标签

产品

版本

Community Treasure Hunt

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

6 个评论
显示 4更早的评论隐藏 4更早的评论