Text Detection & extraction in video
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Hello I had detected text in video using sobel filter & I had search the connected component now I want to generate the rectangular region arrount the text so that I can extract text using matlab plz tell me how to generate rectangular region arround text. Thanking u.
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Image Analyst
on 4 Jul 2015
Rohit, see this link:
Automatically Detect and Recognize Text in Natural Images http://www.mathworks.com/help/vision/examples/automatically-detect-and-recognize-text-in-natural-images.html?prodcode=VP&language=en
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Image Analyst
on 25 Dec 2011
Not quite sure how to answer. Just detect the top and bottom rows, and the left and right columns of where your Sobel filter determines there to be text, and that is your rectangle.
If you want to crop the original grayscale image and save the cropped portion out into its own separate image you can do this:
subImage = fullSizedImage(topRow:bottomRow, leftColumn:rightColumn);
If you want, you can use plot() or rectangle() to display a colored box over the original image in the graphics overlay.
plot([leftColumn rightColumn rightColumn leftColumn leftColumn],...
[topRow topRow bottomRow bottomRow topRow], 'b-');
If you need something different, then say what you need in more explicit terms.
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Image Analyst
on 20 Feb 2013
See my Image Segmentation Tutorial. The code is in there. http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862
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