Why do I get these error message ?
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EyeDetect = vision.CascadeObjectDetector('EyePairBig');
% Read input image
I = imread('Photo.jpg');
subplot(1,2,1), imshow(I);
% Create bounding box
BB = step(EyeDetect, I);
rectangle('Position', BB, 'LineWidth', 3, 'LineStyle', '-', 'EdgeColor','r');
title('Eyes Detection');
Eyes = imcrop(I,BB);
subplot(1,2,2), imshow(Eyes);
title('Cropped Eyes')
Error message
>> EyeDetection
Error using rectangle
Value must be a 4 element vector
Error in EyeDetection (line 9)
rectangle('Position', BB, 'LineWidth', 3, 'LineStyle', '-', 'EdgeColor','r');
1 个评论
dpb
2019-6-28
Because the returned region isn't a 4-vector in BB.
We have no way to know what it actually is -- perhaps either empty if the algorithm failed to find the desired features or alternatively, an Mx4 array if there were more than one region detected.
Set a breakpoint and use the debugger to see or display the image and label the regions returned as in the example in the documentation to see what actually was found...
回答（1 个）
Himanshu tripathi
2019-6-28
编辑：Himanshu tripathi
2019-6-28
Try this
for i = 1:size(BB,1)
rectangle('Position',BB(i,:),'LineWidth',3,'LineStyle','-','EdgeColor','r');
end
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2019-6-28
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