Looking to identify a football from an image
2 次查看(过去 30 天)
显示 更早的评论
I currently have a still image of a football about to be kicked. I would like to identify the ball and it's center. ![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1140355/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1140355/image.png)
0 个评论
回答(1 个)
Kevin Holly
2022-9-30
RGB = imread('YourImage.png');
% Convert RGB image to lab space
I = rgb2lab(RGB);
% Apply thresholds
BW = (I(:,:,1) >= 14.5 ) & (I(:,:,1) <= 89.77) & ...
(I(:,:,2) >= 0.12) & (I(:,:,2) <= 12.5) & ...
(I(:,:,3) >= 3.8) & (I(:,:,3) <= 33.0);
% Open mask
se = strel('disk', 13,0);
BW = imopen(BW, se);
% Filter out smaller objects
BW=bwareafilt(BW,[50000 Inf]);
% Find Centroid and Area of object
rp = regionprops(BW,"Centroid","Area")
% Display masked image for verfication purposes
maskedRGBImage = RGB;
maskedRGBImage(repmat(~BW,[1 1 3])) = 0;
imshow(maskedRGBImage)
% Add marker on centroid
hold on
scatter(rp.Centroid(1),rp.Centroid(2),'b','filled')
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Convert Image Type 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!