How to create a bounding box for multiple objects of interest

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Ryan
Ryan 2015-10-5
评论： Walter Roberson 2015-10-5
Hello Everyone,
I'm working on a project where my goal is to detect and recognize playing cards, and I'm having trouble creating bounding boxes and extracting them to compare against a template image. For right now, I'm just trying to create a bounding box for three separate cards in an image, although ideally I'd like to for just the corners of the cards. But while creating the bounding boxes I can only get it to work with one of the three cards in my image. I'll supply my code and image, and if anyone could help me any I would greatly appreciate it. For right now it is only working with the first card.
Ryan
*HERE IS MY CODE***** this is working to create the bounding box for one card. How can I for all three cards? %J is a binary image that's already been processed and using the canny edge detector.
J = Edge;
%For TEST IMAGE
imshow(J)
[B,L] = bwboundaries(J, 'noholes');
figure; imshow(J); hold on;
for k = 1;length(B),
boundary = B{k};
plot(boundary(:,2),boundary(:,1),'g','LineWidth',2);
end

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Walter Roberson
Walter Roberson 2015-10-5
for k = 1;length(B), needs ":" instead of ";"
for k = 1:length(B)
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Ryan
Ryan 2015-10-5
Yea that's what I was I thinking. Even though I'm not quite at that point yet, do you have any advice for doing that in real time. I'm actually grabbing each and every frame from my video and processing the frames continuously. I don't think it would be too hard with a set image, but with varying distances and angles, I imagine this is going to be a difficult problem to solve.

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