如何旋转图像使条形码水平？ - MATLAB
如何使用条形码旋转图像以确定角度并旋转它以使其水平。我使用了霍夫变换，但只能稍微向右旋转。
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);
How can I rotate the image using the barcode to determine where the angle is and rotate it according to make it horizontal. I used Hough Transform but I can only rotate slightly to the right.
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);
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您首先需要检测线条。对于线条检测，您可以使用霍夫变换。
You need first to detect the lines. For line detection you can use Hough transform.