Matlab：致力于使用 'Detect and Track Multiple Face' 获取检测到的人脸

Question

目前我尝试运行示例Detect and Track Multiple Face。当我尝试如下裁剪检测到的面部图像时：

.....
while keepRunning
.....
displayFrame = insertMarker(displayFrame, tracker.Points);
for I=1:size(bboxes,1)
    J = imcrop(displayFrame, tracker.Bboxes(I, :));
    imshow(J);
    cropfile = sprint('crop %d.jpg, I);
    imwrite(J, cropfile, 'jpg');
 end
.....

然而，当主题不在视野中时，会出现“index is out of bounds because size(tracker.Bboxes)=[0,4].

的错误

Answer 1

当你不在 frame 中时，边界框是空的；你应该在循环之前检查它

if ~isempty(bboxes)
    for I=1:size(bboxes,1) 
    J = imcrop(displayFrame, tracker.Bboxes(I, :));
    imshow(J);
    cropfile = strcat('crop', num2str(I));
    cropfilefull =[cropfile,'.jpg'];
    imwrite(J, cropfilefull, 'jpg');
    end
end

对我有用

Matlab：致力于使用 'Detect and Track Multiple Face' 获取检测到的人脸

Matlab: Working on obtaining detected face using 'Detect and Track Multiple Face'

matlab

crop

face-detection

video-tracking