如何旋转图像使条形码水平？ - MATLAB

Question

如何使用条形码旋转图像以确定角度位置，然后根据水平方向旋转角度。我用Hough Transform，但我只能稍微向右旋转。

rgb = imread('barcode10.jpg'); 
% Resize Image 
rgb = imresize(rgb,0.33); 
figure(),imshow(rgb); 
% Convert from RGB to Gray 
Igray = double(rgb2gray(rgb)); 
BW2 = edge(Igray,'canny'); 
figure(),imshow(BW2); 
% Perform the Hough transform 
[H, theta, rho] = hough(BW2); 
% Find the peak pt in the Hough transform 
peak = houghpeaks(H); 
% Find the angle of the bars 
barAngle = theta(peak(2)); 
J = imrotate(rgb,barAngle,'bilinear','crop'); 
figure(),imshow(J); 

Answer 1

您需要先检测线。对于线路检测，您可以使用Hough transform。