Image identification and acquisition

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mohamed al-asklany 2018-7-25

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/412156-image-identification-and-acquisition

编辑： Walter Roberson 2018-7-26

i have 5 MP camera system with usb dvr has resolution 708*528 and i have 1 meter *1 meter red panel has character ,distance between camera and panel 60 meters when i captured the image of panel the panel can not seen character clearly so i can not detect it how can i solve this problem to detect and i identify it and this is my code

clear all; %%clear all privious variables
clc;
warning('off','all'); %.... diable warining msg ...;
vid = videoinput('winvideo',1);
set(vid, 'FramesPerTrigger', Inf);
set(vid, 'ReturnedColorspace', 'rgb');
 %vid.FrameRate =30;
vid.FrameGrabInterval = 1;  % distance between captured frames 
start(vid)
imgData=getsnapshot(vid);
%  w=imgData(:,:,1)-rgb2gray(imgData);
%   I=imbinarize(w);
%   I = bwareaopen(imgData,100);
I = bwlabel(imgData, 4);
stats = regionprops(I, 'BoundingBox', 'Centroid');
 imshow(I)   
 figure 
 imshow(I);
    hold on
   for object = 1:length(stats)
        bb = stats(object).BoundingBox;
        bc = stats(object).Centroid;
        rectangle('Position',bb,'EdgeColor','r','LineWidth',2)
        plot(bc(1),bc(2), '-m+')
        a=text(bc(1)+15,bc(2), strcat('X: ', num2str(round(bc(1))), '    Y: ', num2str(round(bc(2)))));
        set(a, 'FontName', 'Arial', 'FontWeight', 'bold', 'FontSize', 12, 'Color', 'yellow');
    end
hold off
 word=ocr(I);
stop(vid);