detected Image and text in document.
1 view (last 30 days)
Show older comments
0 down vote favorite
I have a binary image (image1). Now I want to detection where is the figure ( may be include big text) in original image. I use haar wavelet transform and detec a image B include some position may be the figure of A. (image 2). If I use image A - image B = image C (image 3) it may be not good be cause we have some boundary. Now I want remove the boundary or detect exactly the figure in image A? how to do that ?. I try use conected component but it run over time.
There is my image: Image A:
Image B:
Image C:
Image A- imageB =Image C ( that mean if A(i,j)==1 and B(i,j)==1 then C(i,j)=0;)
Please help me. Thank you so much
Answers (2)
Image Analyst
on 23 May 2014
Edited: Image Analyst
on 23 May 2014
Take the image, call imfill(), then erode it enough to make the letters disappear. Then use imreconstruct. See attached demos.
6 Comments
Image Analyst
on 24 May 2014
It looks like B gets all the large blobs. There are a few small scattered dots around the big blobs and it's not picking those up. As far as it's concerned if it's small it could be text. If you want to capture the small surrounding dots, call imclose(). It will dilate the large blobs to engulf the small blobs or connect to nearby blobs, then it will erode to shrink it back down to the original size but without breaking any connections that were made during dialation.
closedImage = imclose(binaryImage, true(9)); % Use whatever window size you want.
Tran Tuan Anh
on 26 May 2014
Edited: Tran Tuan Anh
on 26 May 2014
6 Comments
Image Analyst
on 26 May 2014
Why don't you just threshold and find the areas of all the blobs? All the text will be in a narrow range. Any outliers (bigger or smaller) will be non-letters and might be considered as noise (if smaller) or part of a figure (if bigger).
See Also
Categories
Find more on Discrete Multiresolution Analysis in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!