How to enclose a line using regionprops and rectangle function

2014 1 8
1 个回答
更新时间：2014 1 8
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Dear Image analyst,
I am having two english text lines. I want to enclose individual lines in a rectangle with red color. Can you tell me how can i do this using regionprops and rectangle function.
Waiting for your reply
Suvendra

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回答（1 个）

Image Analyst
Image Analyst 2014-1-8

0 个投票

A simplistic way (probably too simplistic):
  1. Threshold: binaryImage = grayImage < 128;
  2. call imclose to connect nearby letters: binaryImage = imclose(binaryImage, true(7));
  3. call regionprops and ask for BoundingBox measurements = regionprops(binaryImage, 'BoundingBox');
  4. call rectangle() or plot() to draw the box.
Give it a shot. Come back if you can't figure out that algorithm (though I've given 3 out of 4 lines of it so it should be easy to finish the rest of it).

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