Image Processing - How to separate barcode from the background

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Kim
Kim 2011-12-22
回答： mostafa alhamdany 2015-12-4
I'm wondering how to separate the barcode from background itself, and I have tried some different to remove the unwanted object but cannot remove fully , anybody has an idea!
http://www.mediafire.com/?n3q24a2acfjinui
%Read Image
RGB = imread('barcode.jpg');
%Resize Image
RGB = imresize(RGB, 0.33);
%Convert from RGB to Gray
Gray = rgb2gray(RGB);
%Threshold Image to black and white
Threshold = graythresh(Gray);
BW = im2bw(Gray, Threshold);
%Remove Noise
BW2 = bwareaopen(BW,25000);
imshow(BW2)

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采纳的回答

Chandra Kurniawan
Chandra Kurniawan 2011-12-22
Hello, Kim
Here I have the code to do segmentation on your barcode image.
I hope this helps
rgb = imread('barcode.jpg');
rgb = imresize(rgb,0.33);
Igray= rgb2gray(rgb);
Ibw = im2bw(Igray, graythresh(Igray));
Iarea = bwareaopen(Ibw,25000);
Iarea = imfill(Iarea,'holes');
stat = regionprops(Iarea,'boundingbox');
for cnt = 1 : length(stat)
area(cnt) = stat(cnt).BoundingBox(3) * stat(cnt).BoundingBox(4);
end
[C I] = min(area);
Icropped = imcrop(Ibw,stat(I).BoundingBox);
imshow(Icropped);
Original Image :
Cropped Image :
  2 个评论
Malta
Malta 2013-11-11
Why is there an error like this? Error using area (line 42) Must supply Y data or X and Y data as first argument(s).

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更多回答（2 个）

noosa
noosa 2012-1-25
I am trying to run this code but I get this error :
??? Error using ==> area at 44 Must supply Y data or X and Y data as first argument(s).
Can you help me please???
  10 个评论
显示 8更早的评论
Chandra Kurniawan
Chandra Kurniawan 2012-1-25
Just find the largest area and then use that value as threshold
Eq:
I = imread('cameraman.tif');
I = im2bw(I);
stat = regionprops(I,'area');
C(1:length(stat)) = stat(1:end).Area;
m = max(C);
J = bwareaopen(I,m);
imshow(J);

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mostafa alhamdany
mostafa alhamdany 2015-12-4
hi this code is not working and the error is : Error using area (line 35) Must supply Y data or X and Y data as first argument(s).
Error in barcode (line 15) [C I] = min(area); can anyone help me to solve it , please

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